You searched for subject:(Equation of state).
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208 total matches.
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University of Rochester
1.
Gregor, Michelle (1989 - ); Boehly, Thomas R.
The shock and release behaviors of diamond at Terapascal
pressures.
Degree: PhD, 2017, University of Rochester
URL: http://hdl.handle.net/1802/32674 
► The behavior of carbon at terapascal pressures (10’s of millions of atmospheres) is important to modeling ice giant planets and white dwarf stars and to…
(more)
▼ The behavior of carbon at terapascal pressures
(10’s of millions of atmospheres) is
important to modeling ice
giant planets and white dwarf stars and to designing inertial
confinement
fusion (ICF) experiments, where diamond is used to
contain and compress the
hydrogen fuel. The high-pressure shock
and release responses of diamond are of particular
interest to the
initial stages of an ICF implosion. Measurements of these behaviors
provide
rigorous constraints on important paths through carbon’s
equation of state. This work
presents experimental Hugoniot and
release data for both single-crystal diamond (SCD) and
nanocrystalline diamond (NCD), which is comprised of
nanometer-scale diamond grains
and is 5% less dense than SCD. We
find that the NCD used in ICF experiments has a
stiffer Hugoniot
than SCD that can be attributed to porosity. A Gr¨uneisen parameter
of 1
for high-pressure fluid carbon was derived from the NCD and
SCD Hugoniots and is used
in Mie-Gr¨uneisen models to accurately
describe the NCD and SCD release data.
Subjects/Keywords: Equation of State; Shock
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APA (6th Edition):
Gregor, Michelle (1989 - ); Boehly, T. R. (2017). The shock and release behaviors of diamond at Terapascal
pressures. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/32674
Chicago Manual of Style (16th Edition):
Gregor, Michelle (1989 - ); Boehly, Thomas R. “The shock and release behaviors of diamond at Terapascal
pressures.” 2017. Doctoral Dissertation, University of Rochester. Accessed January 18, 2021.
http://hdl.handle.net/1802/32674.
MLA Handbook (7th Edition):
Gregor, Michelle (1989 - ); Boehly, Thomas R. “The shock and release behaviors of diamond at Terapascal
pressures.” 2017. Web. 18 Jan 2021.
Vancouver:
Gregor, Michelle (1989 - ); Boehly TR. The shock and release behaviors of diamond at Terapascal
pressures. [Internet] [Doctoral dissertation]. University of Rochester; 2017. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1802/32674.
Council of Science Editors:
Gregor, Michelle (1989 - ); Boehly TR. The shock and release behaviors of diamond at Terapascal
pressures. [Doctoral Dissertation]. University of Rochester; 2017. Available from: http://hdl.handle.net/1802/32674
Texas A&M University
2.
Ortiz Vega, Diego O.
A New Wide Range Equation of State for Helium-4.
Degree: PhD, Chemical Engineering, 2013, Texas A&M University
URL: http://hdl.handle.net/1969.1/151301
► A multiparametric and fundamental equation of state is presented for the fluid thermodynamic properties of helium. The equation is valid for temperatures from the λ-…
(more)
▼ A multiparametric and fundamental
equation of
state is presented for the fluid thermodynamic properties of helium. The
equation is valid for temperatures from the λ- line (~2.17 K) to 1500 K and for pressures up to 2000 MPa. The formulation can calculate all thermodynamic properties, including density, heat capacity, speed of sound, energies, entropy and saturation properties. A new
equation of
state is necessary to overcome difficulties associated with the current standard in the asymptotic region between the λ -line and 3 K and also difficulties related to lack of data, extrapolation performance, and accuracy at higher temperatures.
Below 50 K, the uncertainties in density are 0.20% at pressures up to 20 MPa. From 50 K to 200 K the uncertainties decrease to 0.05 % at pressures up to 80 MPa. At higher temperatures the uncertainties in density are 0.02 % up to pressures of 80 MPa. At all temperatures and at pressures higher than listed here, the uncertainties may increase to 0.3% in density. The uncertainties in the speed of sound are 0.02%. The uncertainties in vapor pressure are less than 0.02% and for the heat capacities are about 2%. Uncertainties in the critical region are higher for all properties except vapor pressure.
Advisors/Committee Members: Hall, Kenneth R. (advisor), Holste, James C. (advisor), Balbuena, Perla (committee member), Barrufet, Maria (committee member), El-Halwagi, Mahmoud (committee member).
Subjects/Keywords: Helium; Equation of State
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APA (6th Edition):
Ortiz Vega, D. O. (2013). A New Wide Range Equation of State for Helium-4. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151301
Chicago Manual of Style (16th Edition):
Ortiz Vega, Diego O. “A New Wide Range Equation of State for Helium-4.” 2013. Doctoral Dissertation, Texas A&M University. Accessed January 18, 2021.
http://hdl.handle.net/1969.1/151301.
MLA Handbook (7th Edition):
Ortiz Vega, Diego O. “A New Wide Range Equation of State for Helium-4.” 2013. Web. 18 Jan 2021.
Vancouver:
Ortiz Vega DO. A New Wide Range Equation of State for Helium-4. [Internet] [Doctoral dissertation]. Texas A&M University; 2013. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1969.1/151301.
Council of Science Editors:
Ortiz Vega DO. A New Wide Range Equation of State for Helium-4. [Doctoral Dissertation]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151301
Vanderbilt University
3.
Haley, Jessica Deloris.
Predicting the Thermodynamic Properties of Complex Molecular Systems
for Environmental Applications.
Degree: PhD, Chemical Engineering, 2015, Vanderbilt University
URL: http://hdl.handle.net/1803/13135
► The call for the advancement in our ability to design cleaner technologies, as well as mitigate our ecological footprint, requires the investigation of new energy…
(more)
▼ The call for the advancement in our ability to design cleaner technologies, as well as mitigate our ecological footprint, requires the investigation of new energy related systems. Fundamental knowledge of the thermodynamics and phase behavior of such systems is essential for their development and industrial application. Accurate thermophysical properties are required, as limited or inaccurate data may affect the design of processes resulting in a financial or product yield loss; thus, the ability to reliably predict the properties and phase behavior of energy relevant fluids is essential to the development of new and continual improvement of existing chemical and energy processes. Traditional theoretical approaches based on semi-empirical or empirical equations of
state that do not reflect molecular-level structure and interactions, are typically heavily reliant on correlations from experimental data, which may limit their general applicability. Molecular-based equations of
state that take into account molecular structure are an attractive alternative because they yield a more accurate and predictive approach by accounting for the intrinsic effects of the microscopic interactions between molecules that ultimately determine the thermodynamic properties of the fluid. This results in parameters that are typically transferrable to entire classes of molecules. The statistical associating fluid theory for potentials of variable range (SAFT-VR) is one such molecular-based approach that describes chain molecules formed from hard-core monomers that interact via square well potentials of variable attractive range. In this work, systems with significant environmental applications, including carbon dioxide, organic sulfur and fluorine molecules, fatty acid methyl esters, and nanoparticle systems, are studied with the SAFT-VR approach. These systems were specifically chosen, as their unique features (e.g., large molecules, association interactions, electrostatics) have historically made their thermodynamic modeling difficult.
Advisors/Committee Members: Peter Cummings (committee member), Doug LeVan (committee member), Mark Abkowitz (committee member), Clare McCabe (Committee Chair).
Subjects/Keywords: SAFT; Equation of State; Molecular Modeling
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APA (6th Edition):
Haley, J. D. (2015). Predicting the Thermodynamic Properties of Complex Molecular Systems
for Environmental Applications. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/13135
Chicago Manual of Style (16th Edition):
Haley, Jessica Deloris. “Predicting the Thermodynamic Properties of Complex Molecular Systems
for Environmental Applications.” 2015. Doctoral Dissertation, Vanderbilt University. Accessed January 18, 2021.
http://hdl.handle.net/1803/13135.
MLA Handbook (7th Edition):
Haley, Jessica Deloris. “Predicting the Thermodynamic Properties of Complex Molecular Systems
for Environmental Applications.” 2015. Web. 18 Jan 2021.
Vancouver:
Haley JD. Predicting the Thermodynamic Properties of Complex Molecular Systems
for Environmental Applications. [Internet] [Doctoral dissertation]. Vanderbilt University; 2015. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1803/13135.
Council of Science Editors:
Haley JD. Predicting the Thermodynamic Properties of Complex Molecular Systems
for Environmental Applications. [Doctoral Dissertation]. Vanderbilt University; 2015. Available from: http://hdl.handle.net/1803/13135
Penn State University
4.
Imonighavwe, Goodness Oghenetega.
Comparative Analysis of Three Equations of State in the prediction of Liquid Properties and the introduction of a new approach to Phase Behavior Modelling.
Degree: 2016, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/13522goi5004
► Hydrocarbon Phase Behavior modelling is extremely important in the characterization of fluids because this helps in obtaining fluid properties that are important in the design…
(more)
▼ Hydrocarbon Phase Behavior modelling is extremely important in the characterization of fluids because this helps in obtaining fluid properties that are important in the design and optimization of various production processes and facilities. These fluid properties were initially obtained through laboratory measurements until the introduction of cubic equations of
state which provided fairly accurate results in less time. A major drawback of cubic equations of
state is measurement of liquid densities. This is extremely important when dealing with reservoir fluids such as gas condensates which exhibit a retrograde behavior of splitting into gas and liquid phases during isothermal expansion. The goal of this study is to develop a tool that will be able to detect when a hydrocarbon mixture undergoes a phase split and also be able to provide a more accurate prediction of condensate properties than the presently used Equations of
state. This tool is developed by the incorporation of a newly developed
equation of
state into flash calculations and the predictions made are not only compared to experimental values but also to the predictions made by the popular two parameter, Peng-Robinson (PR) and three parameter Patel-Teja’s (PR) equations of
state.
The new
equation of
state proved to be more accurate in the prediction of the composition, density and viscosity of the liquid phase when compared to Peng-Robinson and It also showed great accuracy in the predictions of these properties at higher temperatures, where Patel-Teja failed to excel.
Advisors/Committee Members: Michael Adebola Adewumi, Thesis Advisor/Co-Advisor, unkown, Committee Member, Unknown, Committee Member.
Subjects/Keywords: Thermodynamics; Phase modelling; Equation of state
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APA (6th Edition):
Imonighavwe, G. O. (2016). Comparative Analysis of Three Equations of State in the prediction of Liquid Properties and the introduction of a new approach to Phase Behavior Modelling. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/13522goi5004
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Imonighavwe, Goodness Oghenetega. “Comparative Analysis of Three Equations of State in the prediction of Liquid Properties and the introduction of a new approach to Phase Behavior Modelling.” 2016. Thesis, Penn State University. Accessed January 18, 2021.
https://submit-etda.libraries.psu.edu/catalog/13522goi5004.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Imonighavwe, Goodness Oghenetega. “Comparative Analysis of Three Equations of State in the prediction of Liquid Properties and the introduction of a new approach to Phase Behavior Modelling.” 2016. Web. 18 Jan 2021.
Vancouver:
Imonighavwe GO. Comparative Analysis of Three Equations of State in the prediction of Liquid Properties and the introduction of a new approach to Phase Behavior Modelling. [Internet] [Thesis]. Penn State University; 2016. [cited 2021 Jan 18].
Available from: https://submit-etda.libraries.psu.edu/catalog/13522goi5004.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Imonighavwe GO. Comparative Analysis of Three Equations of State in the prediction of Liquid Properties and the introduction of a new approach to Phase Behavior Modelling. [Thesis]. Penn State University; 2016. Available from: https://submit-etda.libraries.psu.edu/catalog/13522goi5004
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Adelaide
5.
Kalaitzis, Anthony Michael.
Constraining the Equation of State of Nuclear Matter with Neutron Stars.
Degree: 2020, University of Adelaide
URL: http://hdl.handle.net/2440/124869
► Neutron stars present one of the best opportunities to constrain the equation of state of nuclear matter. With the gravitational wave experiment and the imminent…
(more)
▼ Neutron stars present one of the best opportunities to constrain the
equation of
state of nuclear matter. With the gravitational wave experiment and the imminent radius measurements by NICER, understanding what these macroscopic properties are both theoretically and numerically is of great interest to any astronomy or nuclear physicist. Our goal is to explain the topics necessary to understand the constrained quantities in question and allow for easy numerical calculation if one chooses to do so. This will cover nuclear theory and general relativity, finishing with a collection of numerical results with regards to the quark-meson coupling model’s equations of
state and is intended for individuals who understand special relativity and quantum field theory at a minimum.
Advisors/Committee Members: Thomas, Anthony (advisor), Leinweber, Derek (advisor), School of Physical Sciences : Physics (school).
Subjects/Keywords: Neutron stars; equation of state; nuclear matter
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APA (6th Edition):
Kalaitzis, A. M. (2020). Constraining the Equation of State of Nuclear Matter with Neutron Stars. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/124869
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kalaitzis, Anthony Michael. “Constraining the Equation of State of Nuclear Matter with Neutron Stars.” 2020. Thesis, University of Adelaide. Accessed January 18, 2021.
http://hdl.handle.net/2440/124869.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kalaitzis, Anthony Michael. “Constraining the Equation of State of Nuclear Matter with Neutron Stars.” 2020. Web. 18 Jan 2021.
Vancouver:
Kalaitzis AM. Constraining the Equation of State of Nuclear Matter with Neutron Stars. [Internet] [Thesis]. University of Adelaide; 2020. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/2440/124869.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kalaitzis AM. Constraining the Equation of State of Nuclear Matter with Neutron Stars. [Thesis]. University of Adelaide; 2020. Available from: http://hdl.handle.net/2440/124869
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Notre Dame
6.
J. Pocahontas Olson.
A Density Functional Equation of State for Use in
Astrophysical Phenomena</h1>.
Degree: Physics, 2015, University of Notre Dame
URL: https://curate.nd.edu/show/6h440r9874p
► In this thesis, I present a new equation of state for use in simulating supernovae, black holes and neutron star mergers. It is the…
(more)
▼ In this thesis, I present a new
equation of
state for use in simulating supernovae, black holes and neutron
star mergers. It is the first such
equation of
state for
astrophysical applications to use a density functional theory
description for hadronic matter. The inclusion of thermal effects
of matter enable nuclear Skyrme models, which have been highly
tested and constrained at laboratory energy scales, to expand their
domain to predictions of astronomical phenomena. Broadening the
scope of these models can further confine parameter sets, using
vastly different energy scales. The new
equation
of
state, titled the Notre Dame-Livermore
Equation of
State (NDL
EoS), allows for the creation of a pion condensate at high density
and pair production of all known baryonic and mesonic states at
high temperature. The description of matter also allows for the
possibility of the formation of a net proton excess (Ye >
0.5). In addition to the density functional
theory formulation for hadronic matter, the NDL EoS contains low
and high density completions to better describe matter in these
specific energy regimes. The low density description expands upon a
Bowers and Wilson formulation, adding a transition through nuclear
pasta phases, which are of particular importance in neutron star
structure. These low density definitions have further been updated
to include an improved treatment of the nuclear statistical
equilibrium and the transition to heavy nuclei as the density
approaches nuclear matter density. At high densities, matter is
allowed to transition to a quark-gluon plasma (QGP) either as a
first-order Gibbs transition, or a smooth
crossover. I identify predictions of the NDL EoS,
contrasting them to existing equations of
state and various Skyrme
models of the NDL EoS. The observation of a heavy (two solar
masses) neutron star restricts many descriptions of matter, and
rules out several Skyrme parameter sets that had heretofore been
entirely within the bounds set by nuclear
experiments. Finally, I present the results of
core-collapse simulations, both with the original Bowers and Wilson
equation of
state and the NDL EoS, using the spherically symmetric
Mayle and Wilson supernova code.
Advisors/Committee Members: Grant Mathews, Research Director, Stefan Frauendorf, Committee Member, Terrence Rettig, Committee Member, Christopher Kolda, Committee Member.
Subjects/Keywords: Physics; Supernova; Equation of State; Astrophysics
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APA (6th Edition):
Olson, J. P. (2015). A Density Functional Equation of State for Use in
Astrophysical Phenomena</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/6h440r9874p
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Olson, J. Pocahontas. “A Density Functional Equation of State for Use in
Astrophysical Phenomena</h1>.” 2015. Thesis, University of Notre Dame. Accessed January 18, 2021.
https://curate.nd.edu/show/6h440r9874p.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Olson, J. Pocahontas. “A Density Functional Equation of State for Use in
Astrophysical Phenomena</h1>.” 2015. Web. 18 Jan 2021.
Vancouver:
Olson JP. A Density Functional Equation of State for Use in
Astrophysical Phenomena</h1>. [Internet] [Thesis]. University of Notre Dame; 2015. [cited 2021 Jan 18].
Available from: https://curate.nd.edu/show/6h440r9874p.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Olson JP. A Density Functional Equation of State for Use in
Astrophysical Phenomena</h1>. [Thesis]. University of Notre Dame; 2015. Available from: https://curate.nd.edu/show/6h440r9874p
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Notre Dame
7.
Matthew Aaron Meixner.
Supernovae Simulations and the Equation of
State</h1>.
Degree: Physics, 2013, University of Notre Dame
URL: https://curate.nd.edu/show/2514nk33w0g
► In this thesis I present an updated and improved equation of state (which we call the NDL EoS) for use in neutron-star structure and…
(more)
▼ In this thesis I present an updated and
improved
equation of
state (which we call the NDL EoS) for use in
neutron-star structure and supernova simulations. This EoS is based
upon a framework originally developed by Bowers & Wilson,
but there are numerous changes. Among them
are: <ol> a reformulation in
the context of density functional theory; the
possibility of the formation of material with a net proton excess
(Y
e > 0.5); an
improved treatment of the nuclear statistical equilibrium and the
transition to heavy nuclei as the density approaches nuclear matter
density; an improved treatment of the effects
of pions in the regime above nuclear matter density;
the effects of 3-body nuclear forces at high densities;
and a first order or crossover transition to
a QCD chiral symmetry restoration and deconfinement phase at
densities above nuclear matter density. </ol> This
thesis details the physics of, and constraints on, this new EoS and
describes its implementation in numerical
simulations. I show comparisons of this
EoS with other equations of
state commonly used in supernova
collapse and neutron star simulations. I also show the effect the
NDL EoS has on the thermodynamic quantities and nuclear abundances
in the collapse simulation of Mayle &
Wilson.
Advisors/Committee Members: Peter Garnavich, Committee Member, Grant J. Mathews, Committee Member, Chris Howk, Committee Member, Xiaodong Tang, Committee Member.
Subjects/Keywords: Equation of State; Neutron Stars; Supernovae
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APA (6th Edition):
Meixner, M. A. (2013). Supernovae Simulations and the Equation of
State</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/2514nk33w0g
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Meixner, Matthew Aaron. “Supernovae Simulations and the Equation of
State</h1>.” 2013. Thesis, University of Notre Dame. Accessed January 18, 2021.
https://curate.nd.edu/show/2514nk33w0g.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Meixner, Matthew Aaron. “Supernovae Simulations and the Equation of
State</h1>.” 2013. Web. 18 Jan 2021.
Vancouver:
Meixner MA. Supernovae Simulations and the Equation of
State</h1>. [Internet] [Thesis]. University of Notre Dame; 2013. [cited 2021 Jan 18].
Available from: https://curate.nd.edu/show/2514nk33w0g.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Meixner MA. Supernovae Simulations and the Equation of
State</h1>. [Thesis]. University of Notre Dame; 2013. Available from: https://curate.nd.edu/show/2514nk33w0g
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
8.
Pham, Van Nhat.
Development of high throughput microfluidic platforms for the measurement of the protein solution thermodynamic properties : Développement de plateformes microfluidiques à haut débit pour la mesure des propriétés thermodynamiques de la solution de protéine.
Degree: Docteur es, Génie des procédés et de l'environnement, 2016, Université Toulouse III – Paul Sabatier
URL: http://www.theses.fr/2016TOU30369
► Les travaux de cette thèse portent sur le développement de système microfluidiques génériques pour la mesure de propriétés thermodynamiques de solutions de proteines. Un procédé…
(more)
▼ Les travaux de cette thèse portent sur le développement de système microfluidiques génériques pour la mesure de propriétés thermodynamiques de solutions de proteines. Un procédé simple de fabrication de puces microfluidiques résistantes à la pression ainsi qu'à la majorité des solvants organiques a été développé. En outre, les propriétés de surface des microcanaux peuvent être ajustées afin de générer des émulsions eau dans huile ou huile dans l'eau. L'étude des interactions proteines-proteines en solution a été réalisée en couplant ces dispositifs expérimentaux à la diffusion de rayonnement X aux petits angles. Avec seulement quelque milligramme de produit, les données expérimentales obtenues ont permis de calculer le second coefficient du Viriel, grandeur thermodynamique permettant de quantifier les interactions entre protéines. Une nouvelle approche expérimentale a également été développée afin de déterminer l'équation d'état du lysozyme, équation reliant la pression osmotique à la fraction volumique. Ce système microfluidique est basé sur le transfert de matière entre d'une phase dispersée vers une phase continue. Dans une certaine gamme d'activité de l'eau, l'équation d'état obtenu est en bon accord avec les données de la littérature. Afin de relier la dynamique du transfert aux propriétés thermodynamique du système une première approche de modélisation est proposée. Cette approche a pour but de déterminer l'équation d'état de la protéine avec une seule goutte.
This thesis is focused on the development of more efficient protocols and systems, by means of generic microfluidic platforms for measuring thermodynamic properties of protein solutions. A simple method for manufacturing pressure-resistant microfluidic structures with high chemical resistance has been developed. In addition, the surface properties of the fabrication materials can be adjusted to generate hydrophilic and hydrophobic surfaces allowing to generate aqueous and non-aqueous emulsions. On a first approach, the study of protein-protein interactions in solution was successfully performed using just a few milligrams of product by coupling a microfluidic platform, developed ad-hoc for this application, to small angle X-ray scattering. The obtained experimental data were used to calculate the second virial coefficient, thermodynamic parameter which quantifies protein interactions. A second and new experimental approach has also been developed to determine protein equations of state (EOS), which relate protein osmotic pressure to its volume fraction in solution. This novel methodology is based on the study of the mass transfer between a dispersed and a continuous phase, which are generated and controlled by means of a microfluidic setup. For a given range of water activity, the resulting EOS was found to be in good agreement with data reported in the literature. To link the mass transfer dynamics to the thermodynamic properties of the system a first modeling approach was proposed. This approach aims to determine the EOS of the protein using a single…
Advisors/Committee Members: Remigy, Jean-Christophe (thesis director), Teychené, Sébastien (thesis director).
Subjects/Keywords: Microfluidique; SAXS; Protéines; Equation d'état; Interactions; Microfluidic; SAXS; Equation of state; Protein; Interactions
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APA ·
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APA (6th Edition):
Pham, V. N. (2016). Development of high throughput microfluidic platforms for the measurement of the protein solution thermodynamic properties : Développement de plateformes microfluidiques à haut débit pour la mesure des propriétés thermodynamiques de la solution de protéine. (Doctoral Dissertation). Université Toulouse III – Paul Sabatier. Retrieved from http://www.theses.fr/2016TOU30369
Chicago Manual of Style (16th Edition):
Pham, Van Nhat. “Development of high throughput microfluidic platforms for the measurement of the protein solution thermodynamic properties : Développement de plateformes microfluidiques à haut débit pour la mesure des propriétés thermodynamiques de la solution de protéine.” 2016. Doctoral Dissertation, Université Toulouse III – Paul Sabatier. Accessed January 18, 2021.
http://www.theses.fr/2016TOU30369.
MLA Handbook (7th Edition):
Pham, Van Nhat. “Development of high throughput microfluidic platforms for the measurement of the protein solution thermodynamic properties : Développement de plateformes microfluidiques à haut débit pour la mesure des propriétés thermodynamiques de la solution de protéine.” 2016. Web. 18 Jan 2021.
Vancouver:
Pham VN. Development of high throughput microfluidic platforms for the measurement of the protein solution thermodynamic properties : Développement de plateformes microfluidiques à haut débit pour la mesure des propriétés thermodynamiques de la solution de protéine. [Internet] [Doctoral dissertation]. Université Toulouse III – Paul Sabatier; 2016. [cited 2021 Jan 18].
Available from: http://www.theses.fr/2016TOU30369.
Council of Science Editors:
Pham VN. Development of high throughput microfluidic platforms for the measurement of the protein solution thermodynamic properties : Développement de plateformes microfluidiques à haut débit pour la mesure des propriétés thermodynamiques de la solution de protéine. [Doctoral Dissertation]. Université Toulouse III – Paul Sabatier; 2016. Available from: http://www.theses.fr/2016TOU30369
University of Victoria
9.
Walker, David Keith.
Particle trajectory analysis of a two-dimensional shock tube flow.
Degree: Department of Physics and Astronomy, 2014, University of Victoria
URL: http://hdl.handle.net/1828/5201
► The physical properties within the two-dimensional flow produced by the reflection of a plane shock of intermediate strength at a wedge, have been determined by…
(more)
▼ The physical properties within the two-dimensional flow produced by the reflection of a plane shock of intermediate strength at a wedge, have been determined by analysis of the particle trajectories. The particle trajectories were obtained by high speed photography of smoke tracers within the flow. Trajectories were determined for different initial positions of the tracers relative to the wedge. The conservation of mass
equation was used to determine the density at points within the flow. A knowledge of the shock configurations within the flow, together with the Rankins-Hugoniot
equation, was used to determine the pressure immediately behind the incident and reflected shocks. The isentropic
equation of
state was used to determine the pressure after the passage of the reflected shock. The pressure determined in this manner agreed, within the limits of experimental error, with that obtained using a piezo-electric transducer. The temperature, velocity of sound, and particle velocity at points within the flow were also determined.
Advisors/Committee Members: Dewey, John M. (supervisor).
Subjects/Keywords: particle trajectory; analysis; two-dimensional; shock tube; isentropic equation of state; Rankins-Hugoniot equation
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APA (6th Edition):
Walker, D. K. (2014). Particle trajectory analysis of a two-dimensional shock tube flow. (Masters Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/5201
Chicago Manual of Style (16th Edition):
Walker, David Keith. “Particle trajectory analysis of a two-dimensional shock tube flow.” 2014. Masters Thesis, University of Victoria. Accessed January 18, 2021.
http://hdl.handle.net/1828/5201.
MLA Handbook (7th Edition):
Walker, David Keith. “Particle trajectory analysis of a two-dimensional shock tube flow.” 2014. Web. 18 Jan 2021.
Vancouver:
Walker DK. Particle trajectory analysis of a two-dimensional shock tube flow. [Internet] [Masters thesis]. University of Victoria; 2014. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1828/5201.
Council of Science Editors:
Walker DK. Particle trajectory analysis of a two-dimensional shock tube flow. [Masters Thesis]. University of Victoria; 2014. Available from: http://hdl.handle.net/1828/5201
University of New Mexico
10.
O'Grady, Caitlin.
Micro-Sandwich Test of Vapor-Deposited Hexanitroazobenzene (HNAB).
Degree: Mechanical Engineering, 2016, University of New Mexico
URL: http://hdl.handle.net/1928/32972
► Experiments were conducted to support development of equation of state (EOS) of detonation products for the high explosive, hexanitroazobenzene (HNAB) using a scaled-down version of…
(more)
▼ Experiments were conducted to support development of
equation of
state (EOS) of detonation products for the high explosive, hexanitroazobenzene (HNAB) using a scaled-down version of a sandwich test. The sandwich test is the 2-dimensional analog of the well-known 1-dimensional cylinder test. Use of the sandwich test allows experiments to be conducted on films of explosive produced by physical vapor deposition (PVD). PVD allows for close contact between the explosive and the substrate and provides repeatable geometries and microstructures. The PVD process was conducted in a custom deposition chamber at Sandia National Laboratories. HNAB was deposited by vacuum thermal evaporation onto tantalum substrates that were rotated to ensure uniform thicknesses. Amorphous HNAB films were deposited onto three different thicknesses of tantalum substrates, crystallized to HNAB-II at 35°C, then assembled into a symmetrical slab configuration by joining two identical small-scale samples to form the "micro-sandwich." The experiment successfully measured velocity of the tantalum liner during detonation. The experimental data were provided to modelers to validate EOS generated using the CTH shock-physics code.
Advisors/Committee Members: Truman, C. Randall, Tappan, Alexander S., Naseri Kouzehgarani, Asal, Poroseva, Svetlana.
Subjects/Keywords: Hexanitroazobenzene (HNAB); Micro-Sandwich Test; Explosive equations of state; Equation of State (EOS); Sandwich Test
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APA (6th Edition):
O'Grady, C. (2016). Micro-Sandwich Test of Vapor-Deposited Hexanitroazobenzene (HNAB). (Masters Thesis). University of New Mexico. Retrieved from http://hdl.handle.net/1928/32972
Chicago Manual of Style (16th Edition):
O'Grady, Caitlin. “Micro-Sandwich Test of Vapor-Deposited Hexanitroazobenzene (HNAB).” 2016. Masters Thesis, University of New Mexico. Accessed January 18, 2021.
http://hdl.handle.net/1928/32972.
MLA Handbook (7th Edition):
O'Grady, Caitlin. “Micro-Sandwich Test of Vapor-Deposited Hexanitroazobenzene (HNAB).” 2016. Web. 18 Jan 2021.
Vancouver:
O'Grady C. Micro-Sandwich Test of Vapor-Deposited Hexanitroazobenzene (HNAB). [Internet] [Masters thesis]. University of New Mexico; 2016. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1928/32972.
Council of Science Editors:
O'Grady C. Micro-Sandwich Test of Vapor-Deposited Hexanitroazobenzene (HNAB). [Masters Thesis]. University of New Mexico; 2016. Available from: http://hdl.handle.net/1928/32972
Mississippi State University
11.
Oyeka, Onyema.
Explicit finite element comparison of the lower human extremity under blast load.
Degree: MS, Agricultural and Biological Engineering, 2013, Mississippi State University
URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-11292012-204915/
;
► Most studies on blast explosion focus on a single technique or software. This Thesis directly compares several methods of simulating blast loads using LS-DYNA,…
(more)
▼ Most studies on blast explosion focus on a single technique or software. This Thesis directly compares several methods of simulating blast loads using LS-DYNA, ABAQUS and CTH software. The techniques appraised in this thesis include; Jones-Wilkins-Lee (JWL)
equation of
state (EOS), spherical incident wave formulation, and a direct planar blast load application. In the first section of this study, we analyzed a free air-blast generated by detonating 100 g of composition-4 (C-4). Next, we placed and examined the lower extremity model under the same blast parameters in different coupled and uncoupled scenarios. In the free air-blast study, all three codes gave similar results. The peak over pressure from ABAQUS was the closest in value to the experimentally measured data. In the second section, the JWL EOS method consistently produced higher-pressure response in the lower extremity elements compared to the other methods implemented.
Advisors/Committee Members: Robert Linford (committee member), Jun Liao (committee member), Lakiesha Williams (committee member), Mark Horstemeyer (committee member).
Subjects/Keywords: Blast methods; LS-DYNA; ABAQUS; CTH; JWL equation of state
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Manager
APA (6th Edition):
Oyeka, O. (2013). Explicit finite element comparison of the lower human extremity under blast load. (Masters Thesis). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-11292012-204915/ ;
Chicago Manual of Style (16th Edition):
Oyeka, Onyema. “Explicit finite element comparison of the lower human extremity under blast load.” 2013. Masters Thesis, Mississippi State University. Accessed January 18, 2021.
http://sun.library.msstate.edu/ETD-db/theses/available/etd-11292012-204915/ ;.
MLA Handbook (7th Edition):
Oyeka, Onyema. “Explicit finite element comparison of the lower human extremity under blast load.” 2013. Web. 18 Jan 2021.
Vancouver:
Oyeka O. Explicit finite element comparison of the lower human extremity under blast load. [Internet] [Masters thesis]. Mississippi State University; 2013. [cited 2021 Jan 18].
Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-11292012-204915/ ;.
Council of Science Editors:
Oyeka O. Explicit finite element comparison of the lower human extremity under blast load. [Masters Thesis]. Mississippi State University; 2013. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-11292012-204915/ ;
Vanderbilt University
12.
Chang, Hui-Yiing.
Scalar field models for dark energy.
Degree: PhD, Physics, 2014, Vanderbilt University
URL: http://hdl.handle.net/1803/13203
► The accelerated expansion of the universe was discovered in 1998 through studying high–redshift Type Ia supernovae. “Dark energy” has been proposed to account for this…
(more)
▼ The accelerated expansion of the universe was discovered in 1998 through studying high–redshift Type Ia supernovae. “Dark energy” has been proposed to account for this acceleration. There have been sundry candidates for dark energy, which remains one of the greatest unresolved mysteries in science today. Einstein's cosmological constant Λ originally introduced in 1917 became a strong candidate for dark energy. A model of the universe with cold dark matter (CDM) and a cosmological constant, the ΛCDM, became the currently accepted model of the universe. However, there are distinct unresolved issues with the ΛCDM cosmology, one major one being the coincidence problem. There are also realistic models of the universe, such as quintessence cosmologies which contain a scalar field <i>Φ</i>, hypothesized to be time–varying dark energy, that have been proposed.
In the cyclic phantom model, the universe is dominated sequentially by radiation, matter, and a phantom dark energy field, followed by a standard inflationary phase. Since this cycle repeats endlessly, the universe spends a substantial portion of its lifetime in a
state for which the matter and dark energy densities have comparable magnitudes, thus ameliorating the coincidence problem.
In inflection point quintessence, a cosmology invented by the author and her advisor, the accelerated expansion of the universe is driven by a scalar field rolling near an inflection point in the potential. For the simplest such models, in which the potential is of the form <i>V(Φ) = V
0 + V
3 (Φ – Φ
0)
3</i>, the scalar field can yield an eternal or a transient acceleration. The cases that imitate the ΛCDM can be consistent with either outcome.
Finally, a quintessence model with a modified exponential potential given by <i>V(Φ) = V
0 (1 + e
–λΦ)</i> can produce an acceptable accelerated expansion at late times. The strongest constraints on the model from Cosmic Microwave Background observations give the limit <i>λ</i> > 13. This cosmology provides a partial solution to the coincidence problem. The above three models of the universe contain scalar fields. The goal of this dissertation is to further the revelation of dark energy by providing ideas for more accurate models of the universe.
Advisors/Committee Members: John G. Ratcliffe, Ph.D. (committee member), M. Shane Hutson, Ph.D. (committee member), Andreas A. Berlind, Ph.D. (committee member), Thomas J. Weiler, Ph.D. (committee member), Robert J. Scherrer, Ph.D. (Committee Chair).
Subjects/Keywords: equation of state; Hubble; Friedmann; energy density; scale factor
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Manager
APA (6th Edition):
Chang, H. (2014). Scalar field models for dark energy. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/13203
Chicago Manual of Style (16th Edition):
Chang, Hui-Yiing. “Scalar field models for dark energy.” 2014. Doctoral Dissertation, Vanderbilt University. Accessed January 18, 2021.
http://hdl.handle.net/1803/13203.
MLA Handbook (7th Edition):
Chang, Hui-Yiing. “Scalar field models for dark energy.” 2014. Web. 18 Jan 2021.
Vancouver:
Chang H. Scalar field models for dark energy. [Internet] [Doctoral dissertation]. Vanderbilt University; 2014. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1803/13203.
Council of Science Editors:
Chang H. Scalar field models for dark energy. [Doctoral Dissertation]. Vanderbilt University; 2014. Available from: http://hdl.handle.net/1803/13203
Texas A&M University
13.
Gomez Osorio, Martin Alonso.
Modeling and Experimental Measurements of Thermodynamic Properties of Natural Gas Mixtures and Their Components.
Degree: PhD, Chemical Engineering, 2016, Texas A&M University
URL: http://hdl.handle.net/1969.1/157973
► Chemical process design requires mathematical models for predicting thermophysical properties. Those models, called equations of state (EoS), need experimental data for parameter estimation and validation.…
(more)
▼ Chemical process design requires mathematical models for predicting thermophysical properties. Those models, called equations of
state (EoS), need experimental data for parameter estimation and validation. This work presents a detailed description of a vibrating tube densimeter, which is an alternative technique for measurement of p-ρ-T data in gases at critical conditions. This apparatus can measure fluids in a temperature range of 300 K to 470 K and pressures up to 140 MPa. This work calibrates the vibrating tube using a physical-based methodology with nitrogen, methane and argon measurements. Carbon dioxide and ethane p-ρ-T data validate calibration procedures covering a wide range in density and pressure. The vibrating tube densimeter performs density measurements for nitrogen + methane mixtures for pressures up to 140 MPa.
This work also presents a new
equation of
state (EoS) having a rational form that can describe properties with accuracy comparable to the best multi-parametric equations with less mathematical complexity. This EoS presents the Helmholtz residual energy as a ratio of two polynomial functions in density (no exponential terms in density are included), which can describe the behavior of pure components. The EoS can be transformed to describe other thermophysical properties as pressure, compressibility factor, heat capacity and speed of sound. Also this
equation can calculate saturated liquid-vapor properties with 20 times less computational time. This work presents rational EoS for nitrogen, argon and methane applicable in wide ranges of pressure and temperature.
Finally, this work proposes a new mixing rule for binary mixtures of gases based upon a quadratic combination of residual Helmholtz energy. This approach divides the energy contribution between interactions of same species and interaction of different species molecules. A rational form is proposed for description of energy interaction between molecules of different species. The mixing rule is applied to nitrogen + methane data.
Advisors/Committee Members: Holste, James (advisor), Hall, Kenneth (advisor), Balbuena, Perla (committee member), Barrufet, Maria (committee member).
Subjects/Keywords: Equation of State; Vibrating Tube Densimeter; Density measurements; Methane; Nitrogen; Argon
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Export
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APA (6th Edition):
Gomez Osorio, M. A. (2016). Modeling and Experimental Measurements of Thermodynamic Properties of Natural Gas Mixtures and Their Components. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/157973
Chicago Manual of Style (16th Edition):
Gomez Osorio, Martin Alonso. “Modeling and Experimental Measurements of Thermodynamic Properties of Natural Gas Mixtures and Their Components.” 2016. Doctoral Dissertation, Texas A&M University. Accessed January 18, 2021.
http://hdl.handle.net/1969.1/157973.
MLA Handbook (7th Edition):
Gomez Osorio, Martin Alonso. “Modeling and Experimental Measurements of Thermodynamic Properties of Natural Gas Mixtures and Their Components.” 2016. Web. 18 Jan 2021.
Vancouver:
Gomez Osorio MA. Modeling and Experimental Measurements of Thermodynamic Properties of Natural Gas Mixtures and Their Components. [Internet] [Doctoral dissertation]. Texas A&M University; 2016. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1969.1/157973.
Council of Science Editors:
Gomez Osorio MA. Modeling and Experimental Measurements of Thermodynamic Properties of Natural Gas Mixtures and Their Components. [Doctoral Dissertation]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/157973
Texas A&M University
14.
Khazndar, Aoubai M.
An Investigation of Using Isochoric Data Points in the Development of Natural Gas Equation of State.
Degree: MS, Chemical Engineering, 2014, Texas A&M University
URL: http://hdl.handle.net/1969.1/152489
► Access to energy is essential for the survival of humans, and the need for energy rises continuously because of population increase and economic progress. Fossil…
(more)
▼ Access to energy is essential for the survival of humans, and the need for energy rises continuously because of population increase and economic progress. Fossil fuels continue to play the major role in satisfying energy demand. Among the fossil fuels, natural gas is the cleanest, most available, and most useful of the energy sources. It finds extensive use in residential, commercial, electric power generation and industrial applications. Moreover, the international energy outlook report released in 2011 indicates that yearly world natural gas consumption should increase from 111 trillion cubic feet in 2008 to 169 trillion cubic feet in 2035. Recently, new natural gas reservoirs have been discovered in many places throughout the world. In 2012, the total world supplies of proved natural gas reserves were estimated to be 6,746.8 trillion cubic feet. Thus, studies on natural gas are significant to advance the technique of natural gas processing, transportation and storage. In these three sectors, an accurate knowledge of the thermodynamic properties of natural gas is essential for engineering and technical processes. Developing accurate equations of
state is important, and can provide us with accurate thermodynamic properties for natural gas. In addition, developing new techniques to produce mathematical models is important to create more accurate results and to enrich this field with new ideas, which might provide progress in the future. The aim of this thesis is to demonstrate a new approach for developing an
equation of
state.
This technique relies upon isochoric data of carbon dioxide pure component to develop mathematical models. This thesis contains nine models based upon experimental and generated data. The generated data come from REFPROP, which also provides an accurate means to adjust experimental data to true isochores. Within this thesis, a regression analysis was performed - using Polymath 6.1 - to provide mathematical structure of the
equation for carbon dioxide. Results indicate that models covering vapor phase has less deviation than models covering liquid or both phases, and models developed by the generated data has less deviation than models developed by the experimental data. The deviation obtained by most of the models was less than the random error imposed upon the data. In this study, we conclude that modeling an
equation of
state from isochores appears to provide sufficient advantages to encourage additional studies on pure fluids and multi-component mixtures.
Advisors/Committee Members: Hall, Kenneth R (advisor), Atilhan , Mert (advisor), Castier, Marcelo (committee member), Fraim , Michael (committee member).
Subjects/Keywords: Energy; Natural gas; isochores; Equation of state; Carbon dioxide
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Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Khazndar, A. M. (2014). An Investigation of Using Isochoric Data Points in the Development of Natural Gas Equation of State. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/152489
Chicago Manual of Style (16th Edition):
Khazndar, Aoubai M. “An Investigation of Using Isochoric Data Points in the Development of Natural Gas Equation of State.” 2014. Masters Thesis, Texas A&M University. Accessed January 18, 2021.
http://hdl.handle.net/1969.1/152489.
MLA Handbook (7th Edition):
Khazndar, Aoubai M. “An Investigation of Using Isochoric Data Points in the Development of Natural Gas Equation of State.” 2014. Web. 18 Jan 2021.
Vancouver:
Khazndar AM. An Investigation of Using Isochoric Data Points in the Development of Natural Gas Equation of State. [Internet] [Masters thesis]. Texas A&M University; 2014. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1969.1/152489.
Council of Science Editors:
Khazndar AM. An Investigation of Using Isochoric Data Points in the Development of Natural Gas Equation of State. [Masters Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/152489
Texas A&M University
15.
D'Lima, Michelle Lynn.
Development of a Thermodynamic Model for Fluids Confined in Spherical Pores.
Degree: MS, Chemical Engineering, 2014, Texas A&M University
URL: http://hdl.handle.net/1969.1/153385
► The thermodynamic properties of a fluid confined in extremely small pores can be substantially different from those observed of the same bulk fluid. These differences…
(more)
▼ The thermodynamic properties of a fluid confined in extremely small pores can be substantially different from those observed of the same bulk fluid. These differences in behavior could have technical applications in adsorption-based separations; may pose a challenge with regards to the extraction of oil entrapped in the small cavities of reservoir rocks; or could even be utilized in complex heterogeneous catalytic systems such as those used in gas-to liquid fuel conversions.
This thesis describes the use of the generalized van der Waals theory to extend cubic equations of
state, such as Peng-Robinson, that are widely applied in the oil and gas industry to model the behavior of pure fluids as well as mixtures confined in spherical pores. Empirical expressions were developed for the coordination number in spherical pores as a function of the molecule to pore size ratio, for the distribution of molecules along the pore radius as function of temperature, and of the interaction potential between the molecules and the pore wall. Despite their relative simplicity, the expressions capture the limiting behaviors expected at high and low temperatures. The model parameters were then fitted to experimental data for the adsorption of light hydrocarbons and gases in common adsorbents. Finally, the calculated results were compared to the experimental results in order to assess the performance of the model, through adsorption equilibrium calculations.
Advisors/Committee Members: Castier, Marcelo (advisor), Hall, Kenneth (committee member), Fraim, Michael (committee member).
Subjects/Keywords: Confinement; Adsorption; Peng-Robinson; Equation of State; Spherical pores
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APA ·
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Export
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Manager
APA (6th Edition):
D'Lima, M. L. (2014). Development of a Thermodynamic Model for Fluids Confined in Spherical Pores. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153385
Chicago Manual of Style (16th Edition):
D'Lima, Michelle Lynn. “Development of a Thermodynamic Model for Fluids Confined in Spherical Pores.” 2014. Masters Thesis, Texas A&M University. Accessed January 18, 2021.
http://hdl.handle.net/1969.1/153385.
MLA Handbook (7th Edition):
D'Lima, Michelle Lynn. “Development of a Thermodynamic Model for Fluids Confined in Spherical Pores.” 2014. Web. 18 Jan 2021.
Vancouver:
D'Lima ML. Development of a Thermodynamic Model for Fluids Confined in Spherical Pores. [Internet] [Masters thesis]. Texas A&M University; 2014. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1969.1/153385.
Council of Science Editors:
D'Lima ML. Development of a Thermodynamic Model for Fluids Confined in Spherical Pores. [Masters Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153385
University of Waterloo
16.
von Konigslow, Kier.
An off-lattice derivation and thermodynamic consistency consideration for the Sanchez-Lacombe equation of state.
Degree: 2017, University of Waterloo
URL: http://hdl.handle.net/10012/12620
► The application of the Sanchez-Lacombe equation of state (SL-EOS) to homogeneous polymeric mixtures is requisite for the application of some types of Self-Consistent Field Theory…
(more)
▼ The application of the Sanchez-Lacombe equation of state (SL-EOS) to homogeneous polymeric mixtures is requisite for the application of some types of Self-Consistent Field Theory (SCFT) to inhomogeneous mixtures. It has recently been observed that the SL-EOS fails to adequately describe the saturated polymer-solvent mixtures considered in polymeric foaming. This observation portends poor outcomes for the application of SCFT to the inhomogeneous polymer mixtures that constitute foams. In order to investigate this failure, an off-lattice method for deriving the SL-EOS is presented. In doing so, it is shown that the phase equilibrium inconsistencies introduced into the mixture formulation through hole volume mixing rules cannot be corrected, as previously proposed. Rather, it is found that any mixing rule applied to the hole volume introduces impermissible thermodynamic inconsistencies to the theory.
A new variant of the theory for use with saturated polymer-solvent mixtures is proposed, eliminating mixing rules in favour of a constant hole volume. This variant is successfully applied to the solubility data of saturated binary and ternary polymer-solvent mixtures, indicating that the previously observed poor performance of the SL-EOS for such mixtures was partly the result of the thermodynamic inconsistencies. Fair agreement is also achieved for swelling data for the same mixtures.
A physical interpretation of hole volume is put forward, characterizing them in terms of rudimentary averaged correlations. The interpretation relates these correlations to the architecture of polymer molecules, evidenced by consideration of both pure fluids and mixtures.
The large number of conflicting literature parameters is addressed by proposing a best practice parameter estimation procedure based on nonlinear least-square fitting, for both for pure fluids and mixtures. Poor performance in some literature parameters is found to be related to sub-optimal parameter estimation practices, namely those that include few data points and those that encompass the critical point.
An additional constraint is proposed for semi-empirical statistical thermodynamical theories that include features without physical basis and use thermodynamic principles to derive material properties, asserting that ensemble equivalence should be imposed. This constraint is applied through the imposition that equations of state derived from each thermodynamic potential be consistent.
Subjects/Keywords: statistical thermodynamics; polymer; foam; Sanchez-Lacombe; equation of state
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Export
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Manager
APA (6th Edition):
von Konigslow, K. (2017). An off-lattice derivation and thermodynamic consistency consideration for the Sanchez-Lacombe equation of state. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/12620
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
von Konigslow, Kier. “An off-lattice derivation and thermodynamic consistency consideration for the Sanchez-Lacombe equation of state.” 2017. Thesis, University of Waterloo. Accessed January 18, 2021.
http://hdl.handle.net/10012/12620.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
von Konigslow, Kier. “An off-lattice derivation and thermodynamic consistency consideration for the Sanchez-Lacombe equation of state.” 2017. Web. 18 Jan 2021.
Vancouver:
von Konigslow K. An off-lattice derivation and thermodynamic consistency consideration for the Sanchez-Lacombe equation of state. [Internet] [Thesis]. University of Waterloo; 2017. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/10012/12620.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
von Konigslow K. An off-lattice derivation and thermodynamic consistency consideration for the Sanchez-Lacombe equation of state. [Thesis]. University of Waterloo; 2017. Available from: http://hdl.handle.net/10012/12620
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas Tech University
17.
Siddiqui, Fahd.
A derivative-less approach for generating phase envelope and applications to equations of state.
Degree: MSin Engineering, Petroleum Engineering, 2012, Texas Tech University
URL: http://hdl.handle.net/2346/73905
► Petroleum engineers are interested in the phase envelope that describes the characteristics of the pore fluids. These phase envelopes are normally established by laboratory measurements…
(more)
▼ Petroleum engineers are interested in the phase envelope that describes the characteristics of the pore fluids. These phase envelopes are normally established by laboratory measurements involving expensive PVT equipment and highly trained personnel. By using an
Equation of
State (EOS) based computer model that requires some hydrocarbon composition data, these envelopes can be generated almost instantly.
An algorithm for generating a complete phase envelope using computer modeling was suggested by Michelsen (1980). His procedure, based on EOS modeling, may sometimes suffer from convergence issues, especially near the critical region. In addition, his procedure requires the partial derivatives of fugacity. In this work a phase behavior model has been developed that incorporates some modifications to Michelsen’s algorithm avoiding the need for calculating these derivatives, which in turn put fewer requirements on the data and computation. These modifications allowed running the model successfully for different hydrocarbon systems without any convergence issues. By not having to deal with the partial derivatives of fugacity, the new model can work with any existing EOS based phase behavior model.
After validating the phase behavior model against commercial software, the model was used for simulating a slim-tube experiment to calculate the Minimum Miscibility Pressure (MMP) using the Metcalfe et al. (1978) procedure. The results from computer modeling are then compared with the results from an experimental study performed by Amao (2011). The results match closely, demonstrating the power of EOS modeling.
Advisors/Committee Members: Menouar, Habib K (committee member), Awal, Mohammad R (committee member), Siddiqui, Shameem (Committee Chair).
Subjects/Keywords: Phase Behavior; Equation of State; EOS; SKR; PR; Phase; Envelope
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APA (6th Edition):
Siddiqui, F. (2012). A derivative-less approach for generating phase envelope and applications to equations of state. (Masters Thesis). Texas Tech University. Retrieved from http://hdl.handle.net/2346/73905
Chicago Manual of Style (16th Edition):
Siddiqui, Fahd. “A derivative-less approach for generating phase envelope and applications to equations of state.” 2012. Masters Thesis, Texas Tech University. Accessed January 18, 2021.
http://hdl.handle.net/2346/73905.
MLA Handbook (7th Edition):
Siddiqui, Fahd. “A derivative-less approach for generating phase envelope and applications to equations of state.” 2012. Web. 18 Jan 2021.
Vancouver:
Siddiqui F. A derivative-less approach for generating phase envelope and applications to equations of state. [Internet] [Masters thesis]. Texas Tech University; 2012. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/2346/73905.
Council of Science Editors:
Siddiqui F. A derivative-less approach for generating phase envelope and applications to equations of state. [Masters Thesis]. Texas Tech University; 2012. Available from: http://hdl.handle.net/2346/73905
18.
Zandy, Agustinus.
Study Of Pore-Dependent Petroleum Fluid Properties In Tight Shale Plays: Bakken Formation.
Degree: MS, Petroleum Engineering, 2017, University of North Dakota
URL: https://commons.und.edu/theses/2388
► In 2013, the United States Geological Survey (USGS) released an estimate of 7.38 billion barrels of oil held within the Bakken Formation, one of…
(more)
▼ In 2013, the United States Geological Survey (USGS) released an estimate of 7.38 billion barrels of oil held within the Bakken Formation, one of the most significant discoveries. However, the Bakken Formation, a tight shale play, is also known for its ultra-low permeability and nano-scale pore size (1 – 100 nm). A nano-scale pore size can impact the petroleum fluid properties when compared to its bulk properties. This study utilized a theory-based analytical method and compares the results with those from experiments conducted under the simulated conditions.
Peng-Robinson
Equation of
State (PR-EOS) was modified to calculate the critical properties of individual hydrocarbon component in confined conditions. The modification was deduced from the Helmholtz free energy function with Lennard-Jones potential for particles interaction. The modified PR-EOS became a function of molecule-to-pore-size ratio. The value of pore size was obtained using nuclear magnetic resonance (NMR) and from related experiments. NMR measurements were conducted on five-Middle Bakken core samples and provided the pore size distribution and porosity. The results from the analytical method and experiments were compared with the data from the literature to examine the theory and for comparison purposes.
Suppression effect on critical temperature was calculated on eight hydrocarbons (from methane to decane) and compared with the experimental results. The total porosity from five- NMR experiments, is within the range of 2.73 to 9.38 % with an average of 5.4 %. A close match was found between the model and experiments with a deviation of 14% for pore sizes within 1 – 3 nm and of 1.02% for pore sizes larger than 3 nm. The pore size of 3 nm seems to work as a cutoff due to the adsorption layers on the vicinity of the pore wall. Also, the bulk critical properties were estimated using the equations and presented similar results to the literature, with a maximum deviation of 0.03%.
Advisors/Committee Members: Hadi Jabbari.
Subjects/Keywords: Confined PVT; Equation of state; NMR; Pore size distribution
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APA (6th Edition):
Zandy, A. (2017). Study Of Pore-Dependent Petroleum Fluid Properties In Tight Shale Plays: Bakken Formation. (Masters Thesis). University of North Dakota. Retrieved from https://commons.und.edu/theses/2388
Chicago Manual of Style (16th Edition):
Zandy, Agustinus. “Study Of Pore-Dependent Petroleum Fluid Properties In Tight Shale Plays: Bakken Formation.” 2017. Masters Thesis, University of North Dakota. Accessed January 18, 2021.
https://commons.und.edu/theses/2388.
MLA Handbook (7th Edition):
Zandy, Agustinus. “Study Of Pore-Dependent Petroleum Fluid Properties In Tight Shale Plays: Bakken Formation.” 2017. Web. 18 Jan 2021.
Vancouver:
Zandy A. Study Of Pore-Dependent Petroleum Fluid Properties In Tight Shale Plays: Bakken Formation. [Internet] [Masters thesis]. University of North Dakota; 2017. [cited 2021 Jan 18].
Available from: https://commons.und.edu/theses/2388.
Council of Science Editors:
Zandy A. Study Of Pore-Dependent Petroleum Fluid Properties In Tight Shale Plays: Bakken Formation. [Masters Thesis]. University of North Dakota; 2017. Available from: https://commons.und.edu/theses/2388
Harvard University
19.
Kraus, Richard Gordon.
On the Thermodynamics of Planetary Impact Events.
Degree: PhD, Earth and Planetary Sciences, 2013, Harvard University
URL: http://nrs.harvard.edu/urn-3:HUL.InstRepos:11125110
► The history of planet formation and evolution is strongly tied to understanding the outcomes of a wide range of impact events, from slow accretionary events…
(more)
▼ The history of planet formation and evolution is strongly tied to understanding the outcomes of a wide range of impact events, from slow accretionary events to hypervelocity events that melt and vaporize large fractions of the colliding bodies. To better understand impact processes, their effects on planetary evolution, and how to interpret geochemical data, we need to improve our knowledge of the behavior of materials over the entire range of conditions accessed by collisions. Here I present experimental results from gas gun, laser driven, and pulsed power facilities. Together these facilities can access the tremendously wide range of pressure and temperature conditions achieved in natural impact events. This work focuses on the thermodynamics of impacts to better understand the phase transitions that most strongly affect the dynamics and chemical consequences of a collision. I show that the entropy generation during collisions is the most natural means of interpreting the thermodynamic processes that occur during an impact event. For materials with sufficient thermodynamic data at high pressures and temperatures, I present a method for obtaining the entropy generation during an impact. With the knowledge of the entropy, I present new shock-and-release techniques to investigate the liquid-vapor region of the phase diagram. I also show that for materials without sufficient data to calculate the entropy generation during an impact, one can use the shock-and-release techniques described here to determine the entropy in the high pressure shock state. With better equation of state models that are constrained by our experimental data, our confidence in impact models improves dramatically. Using a high fidelity equation of state for (H2O). ice, I derive scaling laws for how much (H2O) ice melts and vaporizes for impacts onto icy bodies. Recognizing that icy bodies are not pure ice, I have performed experiments to show how the impact energy partitions between the disparate phases. Finally, I discuss some of the uncertainties in using the laboratory experiments to directly interpret the effects of impacts in nature.
Earth and Planetary Sciences
Advisors/Committee Members: Stewart Mukhopadhyay, Sarah Toby (advisor), Jacobsen, Stein (committee member), Mitrovica, Jerry (committee member), Nellis, William (committee member), Silvera, Isaac (committee member).
Subjects/Keywords: Geophysics; Materials Science; Equation of State; Planetary Impact; Shock; Vaporization
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APA (6th Edition):
Kraus, R. G. (2013). On the Thermodynamics of Planetary Impact Events. (Doctoral Dissertation). Harvard University. Retrieved from http://nrs.harvard.edu/urn-3:HUL.InstRepos:11125110
Chicago Manual of Style (16th Edition):
Kraus, Richard Gordon. “On the Thermodynamics of Planetary Impact Events.” 2013. Doctoral Dissertation, Harvard University. Accessed January 18, 2021.
http://nrs.harvard.edu/urn-3:HUL.InstRepos:11125110.
MLA Handbook (7th Edition):
Kraus, Richard Gordon. “On the Thermodynamics of Planetary Impact Events.” 2013. Web. 18 Jan 2021.
Vancouver:
Kraus RG. On the Thermodynamics of Planetary Impact Events. [Internet] [Doctoral dissertation]. Harvard University; 2013. [cited 2021 Jan 18].
Available from: http://nrs.harvard.edu/urn-3:HUL.InstRepos:11125110.
Council of Science Editors:
Kraus RG. On the Thermodynamics of Planetary Impact Events. [Doctoral Dissertation]. Harvard University; 2013. Available from: http://nrs.harvard.edu/urn-3:HUL.InstRepos:11125110
West Virginia University
20.
Alsanea, Bashayer.
The Impact of Permeability Heterogeneity on Liquid Recovery from Gas Condensate Reservoir.
Degree: MS, Petroleum and Natural Gas Engineering, 2019, West Virginia University
URL: https://doi.org/10.33915/etd.7398
;
https://researchrepository.wvu.edu/etd/7398
► In gas condensate reservoirs, when reservoir pressure drops below dew point pressure as production takes place at the surface, hydrocarbon liquids begin to form.…
(more)
▼ In gas condensate reservoirs, when reservoir pressure drops below dew point pressure as production takes place at the surface, hydrocarbon liquids begin to form. The volume of the liquid formed in the reservoir increases as the reservoir pressure declines below dew point pressure. In most gas condensate reservoirs, the liquid saturation in the formation does not reach to the critical level for liquid flow to occur. Therefore, the liquid formed as result of the pressure decline becomes trapped in the formation. The formation of the liquid in the reservoir causes the produced gas composition to change continuously leading to lower liquid recovery at the surface facilities. The formation permeability directly impacts the pressure in the reservoir and as consequence the amount of liquid that is trapped in a gas condensate reservoir. In this study, a gas condensate reservoir model was developed to investigate the impact of permeability and heterogeneity of the gas condensate reservoir on the liquid recovery. The constant compositional changes in the gas condensate reservoir require rigorous evaluation of the fluid system to determine the hydrocarbon recovery accurately.
A generic gas condensate reservoir model was constructed to simulate the liquid recovery and investigate the impact of permeability heterogeneity on the natural gas liquid recovery. Phase behavior model based on Peng-Robinson EoS
equation of
state (EoS) was developed by matching the results of a constant volume depletion (CVD) experiment obtained from a gas condensate reservoir in the Appalachian Basin. The phase behavior model was then incorporated into the reservoir model. The results of the investigation with the generic gas condensate reservoir model indicated that the permeability heterogeneity has a negative impact on the liquid recovery from a gas condensate reservoir.
Advisors/Committee Members: Kashy Aminian, Sam Ameri, Mehrdad Zamirian.
Subjects/Keywords: Liquid recover; Permeability; Gas condensate; Heterogeneity; Equation of state; Engineering
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APA (6th Edition):
Alsanea, B. (2019). The Impact of Permeability Heterogeneity on Liquid Recovery from Gas Condensate Reservoir. (Thesis). West Virginia University. Retrieved from https://doi.org/10.33915/etd.7398 ; https://researchrepository.wvu.edu/etd/7398
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Alsanea, Bashayer. “The Impact of Permeability Heterogeneity on Liquid Recovery from Gas Condensate Reservoir.” 2019. Thesis, West Virginia University. Accessed January 18, 2021.
https://doi.org/10.33915/etd.7398 ; https://researchrepository.wvu.edu/etd/7398.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Alsanea, Bashayer. “The Impact of Permeability Heterogeneity on Liquid Recovery from Gas Condensate Reservoir.” 2019. Web. 18 Jan 2021.
Vancouver:
Alsanea B. The Impact of Permeability Heterogeneity on Liquid Recovery from Gas Condensate Reservoir. [Internet] [Thesis]. West Virginia University; 2019. [cited 2021 Jan 18].
Available from: https://doi.org/10.33915/etd.7398 ; https://researchrepository.wvu.edu/etd/7398.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Alsanea B. The Impact of Permeability Heterogeneity on Liquid Recovery from Gas Condensate Reservoir. [Thesis]. West Virginia University; 2019. Available from: https://doi.org/10.33915/etd.7398 ; https://researchrepository.wvu.edu/etd/7398
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade do Rio Grande do Sul
21.
Padilha Júnior, Erlí José.
Análise de equações de estado para polímeros.
Degree: 2014, Universidade do Rio Grande do Sul
URL: http://hdl.handle.net/10183/96468
► O estudo do comportamento termodinâmico de polímeros, através da relação pressão-volume-temperatura (PvT), é essencial para analisar os processos físicos que ocorrem durante o seu processamento…
(more)
▼ O estudo do comportamento termodinâmico de polímeros, através da relação pressão-volume-temperatura (PvT), é essencial para analisar os processos físicos que ocorrem durante o seu processamento e para prever as propriedades finais dos produtos. Existem diversos estudos que comparam a precisão de várias equações de estado (EdE) na descrição do comportamento termodinâmico de polímeros. Segundo a literatura, as que usualmente apresentam os melhores resultados são as equações teóricas dos modelos de célula e de vazios, e as equações empíricas Tait e Hartmann- Haque (HH). Entretanto, não há trabalhos que avaliem a qualidade da estimação dos parâmetros e a sensibilidade da predição das propriedades termodinâmicas com relação aos parâmetros das equações. Além disso, há poucos estudos que contemplem a predição dos coeficientes de expansão térmica e de compressão. Com base nessas observações, o objetivo deste estudo foi apresentar uma análise mais detalhada das equações de estado Tait, HH, MCM (modelo de célula modificado) e SHT (teoria de vazios simplificada) na predição do comportamento PvT de polímeros, para os estados físicos fundido e sólido. As EdE foram analisadas com relação à: (i) qualidade na estimação dos parâmetros, (ii) sensibilidade das suas predições para cada um dos seus parâmetros, (iii) qualidade na predição do volume específico, e (iv) qualidade na predição do coeficiente de expansão térmica isobárica e da compressibilidade isotérmica. Os resultados apontaram que todas as equações de estado proporcionaram uma descrição satisfatória do comportamento PvT no estado fundido, com uma leve superioridade da EdE Tait. As EdE apresentaram baixos desvios padrão na estimação dos parâmetros, sensibilidade paramétrica adequada e predições plausíveis do volume específico, do coeficiente de expansão térmica e da compressibilidade isotérmica, com exceção da EdE Tait que apresentou uma predição do coeficiente de expansão térmica que não está de acordo com o esperado teoricamente. No estado sólido, a equação de estado Tait exibiu desempenho semelhante ao apresentado para o estado fundido na predição de dados PvT. A EdE HH apresentou resultados satisfatórios para os polímeros amorfos e dificuldade no ajuste da curva PvT de polímeros semicristalinos.
The study of the pressure-volume-temperature (PvT) behavior of polymers is essential to the analysis of the physical processes that occur during processing, and to predict the properties of the final products. In literature, there are several studies that compare the accuracy of various equations of state (EoS) in describing the PvT behavior of polymers, indicating that the best results are usually obtained with the theoretical equations of cell and hole models, and the Tait and Hartmann-Haque (HH) empirical equations. However, most of these studies do not provide information about the quality of the estimated parameters or the sensitivity of the prediction of thermodynamic properties to the parameters of the equations. Furthermore, there are few studies exploring the…
Advisors/Committee Members: Cardozo, Nilo Sérgio Medeiros.
Subjects/Keywords: Equation of state; Equações de estado; Termodinâmica; PvT behavior; Polímeros; Polymer
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APA (6th Edition):
Padilha Júnior, E. J. (2014). Análise de equações de estado para polímeros. (Thesis). Universidade do Rio Grande do Sul. Retrieved from http://hdl.handle.net/10183/96468
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Padilha Júnior, Erlí José. “Análise de equações de estado para polímeros.” 2014. Thesis, Universidade do Rio Grande do Sul. Accessed January 18, 2021.
http://hdl.handle.net/10183/96468.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Padilha Júnior, Erlí José. “Análise de equações de estado para polímeros.” 2014. Web. 18 Jan 2021.
Vancouver:
Padilha Júnior EJ. Análise de equações de estado para polímeros. [Internet] [Thesis]. Universidade do Rio Grande do Sul; 2014. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/10183/96468.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Padilha Júnior EJ. Análise de equações de estado para polímeros. [Thesis]. Universidade do Rio Grande do Sul; 2014. Available from: http://hdl.handle.net/10183/96468
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
22.
関口, 秀樹.
BWR状態方程式による異種分子間相互作用パラメータmijの再相関 : Correlation of the binary interaction parameters, mij for the systems containing a non-polar substance by the modified generalized BWR equation of state.
Degree: 2011, Hosei University / 法政大学
URL: http://hdl.handle.net/10114/6899
► Based on the relation suggested by Hudson and McCoubery, we proposed new mixing rules for the coefficients of the modified generalized BWR equation of state…
(more)
▼ Based on the relation suggested by Hudson and McCoubery, we proposed new mixing rules for the coefficients of the modified generalized BWR equation of state in a previous work. We found that the binary interaction parameter, mij in the mixing rules were correlated as a function of the ratio of critical molar volume in previous work. Using the previous correlated functions of mij, we examined the prediction abilities of the VLE (vapor - liquid equilibria). As a result, we had good predictions except for binary systems containing of nitrogen or aromatic hydrocarbons. Therefore, we determined the optimal mij of various binary systems and reconsidered the classification of mij. We re-correlated the functions and could change the functions into simpler one. The validity of the present correlation is ascertained by the calculation of VLE for various binary systems and ternary systems. We obtained better results than previous work.工業上、熱力学的物性値が必要になった場合、状態方程式により推算する方法がよく用いられている。しかし、混合物の気液平衡関係などの熱力学的物性値を推算するには、異種分子間の相互作用を補正する項が必要になる。一般的に、この項は気液平衡関係を良好に示すように決定されるが、これでは少ない物性値から多くの熱力学的物性値を計算できるという状態式の優位性は失われてしまう。 当研究室では、以前Hudson-McCoubreyの理論に基づき、異種分子間相互作用係数mijが臨界容積の比Vci/Vcjの関数になることを発見し、mijは似通った化学種ごとに9グループ、12本に分類することで相関可能であることを示している。 本研究では、この相関式から求めたmijを使用して計算した気液平衡推算値とその実験値との偏倚を評価し、式の妥当性を検討した。多くの系で一定の結果を得たが、不十分な系もあったため、グループの分類法自体の評価・検討、相関式の再決定を行った。 アルカン・アルケン・シクロアルカンを含む系は、メタンを除くと一つのグループとしてまとめられる事が分かった。また、窒素と一酸化炭素のグループ、硫化水素、二酸化炭素、アセチレンのグループとして、それぞればらばらに分類されていたものをまとめられることが分かった。結果として、４本の相関式でこれまで扱っていた物質を表現できる事が分かった。簡潔さだけではなく、気液平衡関係などの物性値をさらに良好に示せるようになった。
Subjects/Keywords: modified generalized BWR equation of state; interaction parameter; VLE
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APA ·
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Manager
APA (6th Edition):
関口, . (2011). BWR状態方程式による異種分子間相互作用パラメータmijの再相関 : Correlation of the binary interaction parameters, mij for the systems containing a non-polar substance by the modified generalized BWR equation of state. (Thesis). Hosei University / 法政大学. Retrieved from http://hdl.handle.net/10114/6899
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
関口, 秀樹. “BWR状態方程式による異種分子間相互作用パラメータmijの再相関 : Correlation of the binary interaction parameters, mij for the systems containing a non-polar substance by the modified generalized BWR equation of state.” 2011. Thesis, Hosei University / 法政大学. Accessed January 18, 2021.
http://hdl.handle.net/10114/6899.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
関口, 秀樹. “BWR状態方程式による異種分子間相互作用パラメータmijの再相関 : Correlation of the binary interaction parameters, mij for the systems containing a non-polar substance by the modified generalized BWR equation of state.” 2011. Web. 18 Jan 2021.
Vancouver:
関口 . BWR状態方程式による異種分子間相互作用パラメータmijの再相関 : Correlation of the binary interaction parameters, mij for the systems containing a non-polar substance by the modified generalized BWR equation of state. [Internet] [Thesis]. Hosei University / 法政大学; 2011. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/10114/6899.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
関口 . BWR状態方程式による異種分子間相互作用パラメータmijの再相関 : Correlation of the binary interaction parameters, mij for the systems containing a non-polar substance by the modified generalized BWR equation of state. [Thesis]. Hosei University / 法政大学; 2011. Available from: http://hdl.handle.net/10114/6899
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
23.
秋定, 諒亮.
成分ファミリー法によるBWR状態方程式における異種分子間相互作用パラメータの相関 : CORRELATION OF THE BINARY INTERACTION PARAMETER IN THE MODIFIED GENERALIZED BWR EQUATION OF STATE BY THE LAW OF CHEMICAL COMPONENT FAMILY .
Degree: 2013, Hosei University / 法政大学
URL: http://hdl.handle.net/10114/8683
► Based on the relation suggested by Hudson and McCoubrey, we wrote correlation equation of the binary interaction parameter. We found that the binary interaction parameter…
(more)
▼ Based on the relation suggested by Hudson and McCoubrey, we wrote correlation equation of the binary interaction parameter. We found that the binary interaction parameter was correlated as a function of the ratio of critical molar volume. We determined the optimal binary interaction parameter and divided into 4 chemical component families. Using the binary interaction parameter of correlation equation, we examined the prediction abilities of the VLE (vapor-liquid equilibria).工業上、多くの熱力学物性値が必要であるが、広い温度域、圧力域にわたって測定されている系は多くない。それらを実験によって全て得ることは、時間、労力、金銭の面で困難である。そこで有効なのが、少ないデータを基にして多くの熱力学物性値を推算できる、状態方程式を利用する方法である。この方法をとる際、二成分系以上の熱力学物性値を推算するためには、異種分子間の相互作用を補正する項が必要になる。それが異種分子間相互作用パラメータmijである。本研究ではこのパラメータを化学成分の違いにより分類した、成分ファミリーごとに相関式を立て決定した。またこれらはHudson-McCoubreyの理論に基づき、臨界体積の比の関数として相関している。状態方程式は、BWR状態方程式を改良した一般化修正BWR状態方程式を利用した。相関式によって得られた異種分子間相互作用パラメータを使い、状態方程式を利用して気液平衡関係の逆算を行うことで、相関式の妥当性を検討した。
Subjects/Keywords: modified generalized BWR equation of state; binary interaction parameter
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APA ·
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APA (6th Edition):
秋定, . (2013). 成分ファミリー法によるBWR状態方程式における異種分子間相互作用パラメータの相関 : CORRELATION OF THE BINARY INTERACTION PARAMETER IN THE MODIFIED GENERALIZED BWR EQUATION OF STATE BY THE LAW OF CHEMICAL COMPONENT FAMILY . (Thesis). Hosei University / 法政大学. Retrieved from http://hdl.handle.net/10114/8683
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
秋定, 諒亮. “成分ファミリー法によるBWR状態方程式における異種分子間相互作用パラメータの相関 : CORRELATION OF THE BINARY INTERACTION PARAMETER IN THE MODIFIED GENERALIZED BWR EQUATION OF STATE BY THE LAW OF CHEMICAL COMPONENT FAMILY .” 2013. Thesis, Hosei University / 法政大学. Accessed January 18, 2021.
http://hdl.handle.net/10114/8683.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
秋定, 諒亮. “成分ファミリー法によるBWR状態方程式における異種分子間相互作用パラメータの相関 : CORRELATION OF THE BINARY INTERACTION PARAMETER IN THE MODIFIED GENERALIZED BWR EQUATION OF STATE BY THE LAW OF CHEMICAL COMPONENT FAMILY .” 2013. Web. 18 Jan 2021.
Vancouver:
秋定 . 成分ファミリー法によるBWR状態方程式における異種分子間相互作用パラメータの相関 : CORRELATION OF THE BINARY INTERACTION PARAMETER IN THE MODIFIED GENERALIZED BWR EQUATION OF STATE BY THE LAW OF CHEMICAL COMPONENT FAMILY . [Internet] [Thesis]. Hosei University / 法政大学; 2013. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/10114/8683.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
秋定 . 成分ファミリー法によるBWR状態方程式における異種分子間相互作用パラメータの相関 : CORRELATION OF THE BINARY INTERACTION PARAMETER IN THE MODIFIED GENERALIZED BWR EQUATION OF STATE BY THE LAW OF CHEMICAL COMPONENT FAMILY . [Thesis]. Hosei University / 法政大学; 2013. Available from: http://hdl.handle.net/10114/8683
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Cambridge
24.
Morley, Michael James.
Shock compression of water and solutions of ammonium nitrate.
Degree: PhD, 2011, University of Cambridge
URL: http://www.dspace.cam.ac.uk/handle/1810/239396https://www.repository.cam.ac.uk/bitstream/1810/239396/3/license.txt
;
https://www.repository.cam.ac.uk/bitstream/1810/239396/8/Thesis_hardbound_UL.pdf.txt
;
https://www.repository.cam.ac.uk/bitstream/1810/239396/10/Thesis_hardbound_stylechanges.pdf.txt
;
https://www.repository.cam.ac.uk/bitstream/1810/239396/9/Thesis_hardbound_UL.pdf.jpg
;
https://www.repository.cam.ac.uk/bitstream/1810/239396/11/Thesis_hardbound_stylechanges.pdf.jpg
► Modern mining explosives employ solutions of ammonium nitrate, where the solution is the oxidising component of a fuel/oxidiser mixture. This thesis is primarily concerned with…
(more)
▼ Modern mining explosives employ solutions of ammonium nitrate, where the solution is the oxidising component of a fuel/oxidiser mixture. This thesis is primarily concerned with the shock response of water and of aqueous solutions of ammonium nitrate. Of particular interest are the temperatures induced through shock compression. An experimental facility, using a single stage gas gun in the ‘plate impact’ configuration, is described, along with associated experimental diagnostics. Measurements of, and improvements to, the tilt at impact are reported. The problem of shock temperature is discussed, including a brief review of the relevant literature. It is demonstrated that direct measurement of shock temperature is a complex issue that is not yet fully understood, whereas determination of temperature from an equation of state is an established technique.
In a series of experiments, plate impact techniques were utilised to determine the Hugoniot and, through shock/reload experiments, the equation of state of water and aqueous solutions of ammonium nitrate. In-situ manganin gauges were used to measure stresses in the liquids and, from the arrival times of the shock wave, determine the shock velocity. Linear shock velocity–particle velocity Hugoniots for the liquids were determined, up to particle velocities of 1km/s, with uncertainties on the intercept and slope of these Hugoniots of 5%. A Mie-Grüneisen equation of state was used to describe the shock/reload experiments. Approximate calculations of shock temperature are reported. Increasing ammonium nitrate concentrations resulted in greater calculated temperatures. It was demonstrated that the liquids investigated in this thesis show a temperature dependence of the Grüneisen parameter, Г, which cannot be accommodated in the model. The present work is believed to be the first demonstration of this effect in shock compressed liquids. The data presented provide constraints on future theoretical development of equations of state.
Subjects/Keywords: Shock compression; Plate impact; Water; Ammonium nitrate; Equation of state; Temperature
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APA (6th Edition):
Morley, M. J. (2011). Shock compression of water and solutions of ammonium nitrate. (Doctoral Dissertation). University of Cambridge. Retrieved from http://www.dspace.cam.ac.uk/handle/1810/239396https://www.repository.cam.ac.uk/bitstream/1810/239396/3/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/239396/8/Thesis_hardbound_UL.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/239396/10/Thesis_hardbound_stylechanges.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/239396/9/Thesis_hardbound_UL.pdf.jpg ; https://www.repository.cam.ac.uk/bitstream/1810/239396/11/Thesis_hardbound_stylechanges.pdf.jpg
Chicago Manual of Style (16th Edition):
Morley, Michael James. “Shock compression of water and solutions of ammonium nitrate.” 2011. Doctoral Dissertation, University of Cambridge. Accessed January 18, 2021.
http://www.dspace.cam.ac.uk/handle/1810/239396https://www.repository.cam.ac.uk/bitstream/1810/239396/3/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/239396/8/Thesis_hardbound_UL.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/239396/10/Thesis_hardbound_stylechanges.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/239396/9/Thesis_hardbound_UL.pdf.jpg ; https://www.repository.cam.ac.uk/bitstream/1810/239396/11/Thesis_hardbound_stylechanges.pdf.jpg.
MLA Handbook (7th Edition):
Morley, Michael James. “Shock compression of water and solutions of ammonium nitrate.” 2011. Web. 18 Jan 2021.
Vancouver:
Morley MJ. Shock compression of water and solutions of ammonium nitrate. [Internet] [Doctoral dissertation]. University of Cambridge; 2011. [cited 2021 Jan 18].
Available from: http://www.dspace.cam.ac.uk/handle/1810/239396https://www.repository.cam.ac.uk/bitstream/1810/239396/3/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/239396/8/Thesis_hardbound_UL.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/239396/10/Thesis_hardbound_stylechanges.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/239396/9/Thesis_hardbound_UL.pdf.jpg ; https://www.repository.cam.ac.uk/bitstream/1810/239396/11/Thesis_hardbound_stylechanges.pdf.jpg.
Council of Science Editors:
Morley MJ. Shock compression of water and solutions of ammonium nitrate. [Doctoral Dissertation]. University of Cambridge; 2011. Available from: http://www.dspace.cam.ac.uk/handle/1810/239396https://www.repository.cam.ac.uk/bitstream/1810/239396/3/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/239396/8/Thesis_hardbound_UL.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/239396/10/Thesis_hardbound_stylechanges.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/239396/9/Thesis_hardbound_UL.pdf.jpg ; https://www.repository.cam.ac.uk/bitstream/1810/239396/11/Thesis_hardbound_stylechanges.pdf.jpg
University College London (University of London)
25.
Goodwin, Anthony Robert Holmes.
Thermophysical properties from the speed of sound.
Degree: PhD, 1988, University College London (University of London)
URL: https://discovery.ucl.ac.uk/id/eprint/1317959/
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308940
► The speed of sound in various gases between 250 and 350 K has been obtained from measurements of the frequencies of the radial modes of…
(more)
▼ The speed of sound in various gases between 250 and 350 K has been obtained from measurements of the frequencies of the radial modes of spherical acoustic resonators; two resonators were used and both apparatus are described. The radius of each resonator was obtained from the speed of sound in argon. Measurements with the 60 mm radius resonator were made below 115 kPa on the six substances: n-butane; methyipropane; n-pentane; methylbutane; dimethylpropane; and, methanol. Perfect gas heat capacities and second and third acoustic virial coefficients for these substances have been calculated from the results, and estimates are given for the second and third (p,Vm,T) virial coefficients. A sealed resonator of radius 40 mm was used to obtain acoustic results below 7 MPa on argon and the industrially important gases methane, a natural gas, and air. Measurements with argon provided an opportunity to study the model used to account for acoustic energy losses in the resonator. The speed of sound, for the industrially important gases, was compared with estimates obtained from several equations of state.
Subjects/Keywords: 541; Gases; Equation of state
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APA (6th Edition):
Goodwin, A. R. H. (1988). Thermophysical properties from the speed of sound. (Doctoral Dissertation). University College London (University of London). Retrieved from https://discovery.ucl.ac.uk/id/eprint/1317959/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308940
Chicago Manual of Style (16th Edition):
Goodwin, Anthony Robert Holmes. “Thermophysical properties from the speed of sound.” 1988. Doctoral Dissertation, University College London (University of London). Accessed January 18, 2021.
https://discovery.ucl.ac.uk/id/eprint/1317959/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308940.
MLA Handbook (7th Edition):
Goodwin, Anthony Robert Holmes. “Thermophysical properties from the speed of sound.” 1988. Web. 18 Jan 2021.
Vancouver:
Goodwin ARH. Thermophysical properties from the speed of sound. [Internet] [Doctoral dissertation]. University College London (University of London); 1988. [cited 2021 Jan 18].
Available from: https://discovery.ucl.ac.uk/id/eprint/1317959/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308940.
Council of Science Editors:
Goodwin ARH. Thermophysical properties from the speed of sound. [Doctoral Dissertation]. University College London (University of London); 1988. Available from: https://discovery.ucl.ac.uk/id/eprint/1317959/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308940
University of Toronto
26.
Mahmood, Syed Hassan.
Thermodynamic Investigation of the Interaction between Polymer and Gases.
Degree: PhD, 2017, University of Toronto
URL: http://hdl.handle.net/1807/80205
► This thesis investigates the interaction between blowing agents and polymer matrix. Existing theoretical model was further developed to accommodate the polymer and blowing agent under…
(more)
▼ This thesis investigates the interaction between blowing agents and polymer matrix. Existing theoretical model was further developed to accommodate the polymer and blowing agent under study. The obtained results are not only useful for the optimization of the plastic foam fabrication process but also provides a different approach to usage of blowing agents.
A magnetic suspension balance and an in-house visualizing dilatometer were used to obtain the sorption of blowing agents in polymer melts under elevated temperature and pressure. The proposed theoretical approach based on the thermodynamic model of SS-EOS is applied to understand the interaction of blowing agents with the polymer melt and one another (in the case of blend blowing agent).
An in-depth study of the interaction of a blend of CO2 and DME with PS was conducted. Experimental volume swelling of the blend/PS mixture was measured and compared to the theoretical volume swelling obtained via ternary based SS-EOS, insuring the models validity. The effect of plasticization due to dissolution of DME on the solubility of CO2 in PS was then investigated by utilizing the aforementioned model. It was noted that the dissolution of DME increased the concentration of CO2 in PS and lowering the saturation pressure needed to dissolved a certain amount of CO2 in PS melt.
The phenomenon of retrograde vitrification in PMMA induced due dissolution of CO2 was investigated in light of the thermodynamic properties resulting from the interaction of polymer and blowing agent. Solubility and volume swelling were measured in the pressure and temperature ranges promoting vitrification phenomenon, with relation being established between the thermodynamic properties and the vitrification process. Foaming of PMMA was conducted at various temperature values to investigate the application of this phenomenon.
Advisors/Committee Members: Park, Chul B, Mechanical and Industrial Engineering.
Subjects/Keywords: Blend Gases; Equation of State; Foaming; Interfacial tension; Solubility; Thermodynamics; 0548
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APA (6th Edition):
Mahmood, S. H. (2017). Thermodynamic Investigation of the Interaction between Polymer and Gases. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/80205
Chicago Manual of Style (16th Edition):
Mahmood, Syed Hassan. “Thermodynamic Investigation of the Interaction between Polymer and Gases.” 2017. Doctoral Dissertation, University of Toronto. Accessed January 18, 2021.
http://hdl.handle.net/1807/80205.
MLA Handbook (7th Edition):
Mahmood, Syed Hassan. “Thermodynamic Investigation of the Interaction between Polymer and Gases.” 2017. Web. 18 Jan 2021.
Vancouver:
Mahmood SH. Thermodynamic Investigation of the Interaction between Polymer and Gases. [Internet] [Doctoral dissertation]. University of Toronto; 2017. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1807/80205.
Council of Science Editors:
Mahmood SH. Thermodynamic Investigation of the Interaction between Polymer and Gases. [Doctoral Dissertation]. University of Toronto; 2017. Available from: http://hdl.handle.net/1807/80205
University of New Mexico
27.
Bigelow, Josiah M.
A Thermodynamic Study of Binary Real Gas Mixtures Undergoing Normal Shocks.
Degree: Mechanical Engineering, 2017, University of New Mexico
URL: https://digitalrepository.unm.edu/me_etds/168
► We investigate the difference between Amagat and Dalton mixing laws for gaseous equations of state (EOS) using planar traveling shocks. Numerical modeling was performed…
(more)
▼ We investigate the difference between Amagat and Dalton mixing laws for gaseous equations of
state (EOS) using planar traveling shocks. Numerical modeling was performed in the Sandia National Laboratories hydrocode CTH utilizing tabular EOS in the SESAME format. Numerical results were compared to experimental work from the University of New Mexico Shock Tube Laboratory. Latin hypercube samples were used to assess model sensitivities to Amagat and Dalton EOS. We find that the Amagat mixing law agrees best with the experimental results and that significant difference exist between the predictions of the Amagat and Dalton mixing methods.
Advisors/Committee Members: C. Randall Truman, Peter Vorobieff, Timothy Clark, Humberto Silva III.
Subjects/Keywords: Amagat; Dalton; Latin Hypercube; Equation of State; Mechanical Engineering
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Export
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APA (6th Edition):
Bigelow, J. M. (2017). A Thermodynamic Study of Binary Real Gas Mixtures Undergoing Normal Shocks. (Masters Thesis). University of New Mexico. Retrieved from https://digitalrepository.unm.edu/me_etds/168
Chicago Manual of Style (16th Edition):
Bigelow, Josiah M. “A Thermodynamic Study of Binary Real Gas Mixtures Undergoing Normal Shocks.” 2017. Masters Thesis, University of New Mexico. Accessed January 18, 2021.
https://digitalrepository.unm.edu/me_etds/168.
MLA Handbook (7th Edition):
Bigelow, Josiah M. “A Thermodynamic Study of Binary Real Gas Mixtures Undergoing Normal Shocks.” 2017. Web. 18 Jan 2021.
Vancouver:
Bigelow JM. A Thermodynamic Study of Binary Real Gas Mixtures Undergoing Normal Shocks. [Internet] [Masters thesis]. University of New Mexico; 2017. [cited 2021 Jan 18].
Available from: https://digitalrepository.unm.edu/me_etds/168.
Council of Science Editors:
Bigelow JM. A Thermodynamic Study of Binary Real Gas Mixtures Undergoing Normal Shocks. [Masters Thesis]. University of New Mexico; 2017. Available from: https://digitalrepository.unm.edu/me_etds/168
University of Southern California
28.
Lin, Hsiao-Hsuan.
Modeling the hot-dense plasma of the solar interior in and
out of thermal equilibrium.
Degree: PhD, Physics, 2012, University of Southern California
URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/27826/rec/4151
► The developments in helioseismology ensure a wealth of studies in solar physics. In par- ticular, with the high precision of the observations of helioseismology, a…
(more)
▼ The developments in helioseismology ensure a wealth of
studies in solar physics. In par- ticular, with the high precision
of the observations of helioseismology, a high-quality solar model
is mandated, since even the tiny deviations between a model and the
real Sun can be detected. ❧ One crucial ingredient of any solar
model is the thermodynamics of hot-dense plasmas, in particular the
equation of
state. This has motivated efforts to develop
sophisticated theoretical equations of
state (EOS). It is important
to realize that for the conditions of solar-interior plasmas, there
are no terrestrial laboratory experiments; the only observational
constraints come from helioseismology. Among the most successful
EOS is so called OPAL EOS, which is part of the Opacity Project at
Livermore. It is based on an activity expansion of the quantum
plasma, and realized in the so-called ”physical picture”. One of
its main competitor is the so called MHD EOS, which is part of the
international Opacity Project (OP), a non-classified multi-country
consortium. The approach of MHD is via the so-called ”chemical
picture”. Since OPAL is the most accurate
equation of
state so far,
there has been a call for a public-domain version of it. However,
the OPAL code remains proprietary, and its “emulation” makes sense.
An additional reason for such a project is that the results form
OPAL can only be accessed via tables generated by the OPAL team.
Their users do not have the flexibility to change the chemical
composition from their end. The earlier MHD-based OPAL emulator
worked well with its modifica- tions of the MHD
equation of
state,
which is the Planck-Larkin partition function and its corresponding
scattering terms. With this modification, MHD can serve as a OPAL
emula- tor with all the flexibility and accessibility. However, to
build a really user-friendly OPAL emulator one should consider
CEFF-based OPAL emulator. CEFF itself is already widely used
practical EOS which can be easily implemented within any solar
model code. ❧ In the present work we have carried the technique of
the MHD-based OPAL emulator to the CEFF-based OPAL emulator and
successfully accomplished this goal. At the same time, we went
beyond the earlier work by adding more terms. In particular, the
previous MHD-based OPAL emulator was restricted to the
approximation of a hydrogen plasma; our work is extended to the
more realistic H-He mixture. ❧ In a separate part of the present
work, we have examined a non-equilibrium effect in the solar
interior. The effect is located in the zone of the sharp transition
between the differential rotation in the convection zone and the
solid-sphere rotation in the radiation zone beneath it. This
transition was discovered by helioseismology in the 1980s, and the
transition zone is called the solar tachocline. The tachocline is
subject to strong shear and in many theories of the solar dynamo it
plays important role. Being inspired by the well-known Soret
effect, which states the mass diffusion drive by a temperature
gradient, we have examined if…
Advisors/Committee Members: Däppen, WernerDappen, WernerDaeppen, Werner (Committee Chair), Haas, Stephan W. (Committee Member), Nakano, Aiichiro (Committee Member), Chang, Tu-nan (Committee Member), Kunc, Joseph (Committee Member).
Subjects/Keywords: solar physics; equation of state; plasma physics; stellar evolution; helioseismology
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APA ·
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Export
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APA (6th Edition):
Lin, H. (2012). Modeling the hot-dense plasma of the solar interior in and
out of thermal equilibrium. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/27826/rec/4151
Chicago Manual of Style (16th Edition):
Lin, Hsiao-Hsuan. “Modeling the hot-dense plasma of the solar interior in and
out of thermal equilibrium.” 2012. Doctoral Dissertation, University of Southern California. Accessed January 18, 2021.
http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/27826/rec/4151.
MLA Handbook (7th Edition):
Lin, Hsiao-Hsuan. “Modeling the hot-dense plasma of the solar interior in and
out of thermal equilibrium.” 2012. Web. 18 Jan 2021.
Vancouver:
Lin H. Modeling the hot-dense plasma of the solar interior in and
out of thermal equilibrium. [Internet] [Doctoral dissertation]. University of Southern California; 2012. [cited 2021 Jan 18].
Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/27826/rec/4151.
Council of Science Editors:
Lin H. Modeling the hot-dense plasma of the solar interior in and
out of thermal equilibrium. [Doctoral Dissertation]. University of Southern California; 2012. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/27826/rec/4151
29.
Landfield, Ryan Elliott.
Sensitivity of Neutrino-Driven Core-Collapse Supernova Models to the Microphysical Equation of State.
Degree: 2018, University of Tennessee – Knoxville
URL: https://trace.tennessee.edu/utk_graddiss/5294
► The aim of this dissertation is to explore the sensitivity of neutrino-driven core collapse supernova physics to the microphysical equation of state of the stellar…
(more)
▼ The aim of this dissertation is to explore the sensitivity of neutrino-driven core collapse supernova physics to the microphysical equation of state of the stellar matter. Core collapse supernovae result from the gravitational collapse and ensuing explosion of massive stars. The most fundamental question in core collapse supernova (CCSN) theory is the mechanism of shock revival leading to the observed supernova explosion. The leading scenario is that neutrinos trapped in the proto-neutron star (PNS) during its formation escape and reheat the inner shock, reviving the shockwave, which expands outward, ejecting the star's outer shells into space. Given the central importance of the delayed heating mechanism to the dynamics of CCSNe, detailed studies of the dynamics of the neutrino heating mechanism, neutrino and gravitational wave (GW) signatures, and the dependence on both neutrinomatter interaction rates and the nuclear equation of state (EOS) are needed. The first direct detection of a GW emission from a CCSN would allow for a qualitative investigation into the accuracy of existing nuclear-force models via the EOS. Hence accurate CCSN numerical models are imminently necessary to predict and interpret such GW signatures. A tandem measurement of neutrino signature modulations and GWs would provide direct information about the CCSN mechanism and further our insight into the origins of neutron star rotation and kicks. In order to enhance the computational capability of the ORNL/UTK CCSN simulations, firstly I have developed the capacity to implement different pre-processed state-of- the-art EOS tables in the ORNL/UTK multi-D SN code CHIMERA. I have developed the multi-purpose EOS/Opacity table repository WeakLib for this purpose. Secondly, I have implemented these different EOS in 1D and 2D CHIMERA to study the impact of the EOS on the collapse, bounce, and post-bounce dynamics of the CCSNe explosion, as well as the impact on neutrino emission signals.
Subjects/Keywords: Astrophysics; Core-Collapse Supernovae; Equation of State; Numerical Simulation
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Export
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APA (6th Edition):
Landfield, R. E. (2018). Sensitivity of Neutrino-Driven Core-Collapse Supernova Models to the Microphysical Equation of State. (Doctoral Dissertation). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_graddiss/5294
Chicago Manual of Style (16th Edition):
Landfield, Ryan Elliott. “Sensitivity of Neutrino-Driven Core-Collapse Supernova Models to the Microphysical Equation of State.” 2018. Doctoral Dissertation, University of Tennessee – Knoxville. Accessed January 18, 2021.
https://trace.tennessee.edu/utk_graddiss/5294.
MLA Handbook (7th Edition):
Landfield, Ryan Elliott. “Sensitivity of Neutrino-Driven Core-Collapse Supernova Models to the Microphysical Equation of State.” 2018. Web. 18 Jan 2021.
Vancouver:
Landfield RE. Sensitivity of Neutrino-Driven Core-Collapse Supernova Models to the Microphysical Equation of State. [Internet] [Doctoral dissertation]. University of Tennessee – Knoxville; 2018. [cited 2021 Jan 18].
Available from: https://trace.tennessee.edu/utk_graddiss/5294.
Council of Science Editors:
Landfield RE. Sensitivity of Neutrino-Driven Core-Collapse Supernova Models to the Microphysical Equation of State. [Doctoral Dissertation]. University of Tennessee – Knoxville; 2018. Available from: https://trace.tennessee.edu/utk_graddiss/5294
30.
Sriskantha, Hari Haran.
Pseudo-Newtonian simulations of black hole-neutron star mergers as possible progenitors of short-duration gamma-ray bursts.
Degree: PhD, 2014, University of Edinburgh
URL: http://hdl.handle.net/1842/9651
► Black hole-neutron star (BH-NS) mergers are promising candidates for the progenitors of short-duration gamma-ray bursts (GRBs). With the right initial conditions, the neutron star becomes…
(more)
▼ Black hole-neutron star (BH-NS) mergers are promising candidates for the progenitors of short-duration gamma-ray bursts (GRBs). With the right initial conditions, the neutron star becomes tidally disrupted, eventually forming a dense, accreting disk around the black hole. The thermal energy of this black hole-disk system can be extracted via neutrino processes, while the spin energy of the black hole can be extracted via magnetic processes. Either (or even a combination of these) processes could feasibly power a relativistic jet with energy ≥~ 10 49 erg and duration ≤~ 2 s, hence producing a short-duration GRB. In this thesis, we investigate BH-NS mergers with three-dimensional, pseudo-Newtonian simulations. We use the simulation code Charybdis, which uses a dimensionally-split, reconstruct-solve-average scheme (i.e. using Riemann solvers) to solve the Euler equations of hydrodynamics. Although the code is based on a Newtonian framework, it includes pseudo- Newtonian approximations of local gravitational wave effects and the innermost stable circular orbit of the BH, which are both general relativistic phenomena. The code also includes the effects of global neutrino emission, shear viscosity and self-gravity. This thesis comprises two main projects. The first project is a parameter study of the equation of state, which encapsulates the relationship between the pressure of a fluid and its other thermodynamic properties. Although the EOS is well understood at low densities, it is yet to be constrained at supranuclear densities, and so must be treated as a parameter in numerical studies of BH-NS mergers. We present simulations using three existing EOSs, in order to investigate their effect on the merger dynamics. We find that the EOS strongly influences the fate of the NS, the properties of the accretion disk, and the neutrino emission. In the second project, we begin upgrading Charybdis to include magnetic field effects, in order to investigate the magnetic processes described above. We implement existing reconstruction and Riemann solver algorithms for the equations of magnetohydrodynamics, and present 1D tests to compare them. When modelling magnetic fields in more than one dimension, we must also deal with the divergence-free condition, ∇. B = 0. We develop a new constrained transport algorithm to ensure our code maintains this condition, and present 2D tests to confirm its accuracy. This algorithm has many advantages over existing ones, including easier implementation, greater computational efficiency and better parallelisation. Finally, we present preliminary tests that use these algorithms in simulations of BH-NS mergers.
Subjects/Keywords: 522; gamma-ray bursts; equation of state; magnetic fields; constrained transport
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Manager
APA (6th Edition):
Sriskantha, H. H. (2014). Pseudo-Newtonian simulations of black hole-neutron star mergers as possible progenitors of short-duration gamma-ray bursts. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/9651
Chicago Manual of Style (16th Edition):
Sriskantha, Hari Haran. “Pseudo-Newtonian simulations of black hole-neutron star mergers as possible progenitors of short-duration gamma-ray bursts.” 2014. Doctoral Dissertation, University of Edinburgh. Accessed January 18, 2021.
http://hdl.handle.net/1842/9651.
MLA Handbook (7th Edition):
Sriskantha, Hari Haran. “Pseudo-Newtonian simulations of black hole-neutron star mergers as possible progenitors of short-duration gamma-ray bursts.” 2014. Web. 18 Jan 2021.
Vancouver:
Sriskantha HH. Pseudo-Newtonian simulations of black hole-neutron star mergers as possible progenitors of short-duration gamma-ray bursts. [Internet] [Doctoral dissertation]. University of Edinburgh; 2014. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1842/9651.
Council of Science Editors:
Sriskantha HH. Pseudo-Newtonian simulations of black hole-neutron star mergers as possible progenitors of short-duration gamma-ray bursts. [Doctoral Dissertation]. University of Edinburgh; 2014. Available from: http://hdl.handle.net/1842/9651
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Open Access Theses and Dissertations
