subject:(Stochastic Hydrodynamics)

University of Colorado

1. Young, Ryan E. Hydrodynamics of Unitary Fermi Gases.

Degree: MA, Applied Mathematics, 2013, University of Colorado

URL: https://scholar.colorado.edu/appm_gradetds/40

► Unitary fermi gases have been widely studied as they provide a tabletop archetype for research on strongly coupled many body systems and perfect fluids.… (more)

Subjects/Keywords: Elliptic Flow; Lattice Boltzmann; Stochastic Hydrodynamics; Unitary Fermi Gas; Applied Mathematics; Physics

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APA (6^th Edition):

Young, R. E. (2013). Hydrodynamics of Unitary Fermi Gases. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/appm_gradetds/40

Chicago Manual of Style (16^th Edition):

Young, Ryan E. “Hydrodynamics of Unitary Fermi Gases.” 2013. Masters Thesis, University of Colorado. Accessed March 07, 2021. https://scholar.colorado.edu/appm_gradetds/40.

MLA Handbook (7^th Edition):

Young, Ryan E. “Hydrodynamics of Unitary Fermi Gases.” 2013. Web. 07 Mar 2021.

Vancouver:

Young RE. Hydrodynamics of Unitary Fermi Gases. [Internet] [Masters thesis]. University of Colorado; 2013. [cited 2021 Mar 07]. Available from: https://scholar.colorado.edu/appm_gradetds/40.

Council of Science Editors:

Young RE. Hydrodynamics of Unitary Fermi Gases. [Masters Thesis]. University of Colorado; 2013. Available from: https://scholar.colorado.edu/appm_gradetds/40

Hong Kong University of Science and Technology

2. Lu, Zhihua. Stochastic modelling of unsteady open channel flow and reliability analysis.

Degree: 2008, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-3602 ; https://doi.org/10.14711/thesis-b1029848 ; http://repository.ust.hk/ir/bitstream/1783.1-3602/1/th_redirect.html

► Flow modeling in open channels is essential in planning, design, operation and maintenance of the flow-related hydro-infrastructural systems, such as bridges, dams, levees, storm sewers,… (more)

▼ Flow modeling in open channels is essential in planning, design, operation and maintenance of the flow-related hydro-infrastructural systems, such as bridges, dams, levees, storm sewers, pipelines, and coastal/offshore structures. Uncertainty exists in flow modeling arising from model inputs and parameters, such as the initial conditions, boundary conditions and roughness coefficient, due to the naturally inherent variability, which leads to uncertainty in predicting or estimating flow. The stochastic model of unsteady open channel flow is developed by the perturbative expansion-based moment equation (PEME) method to provide a framework of quantifying flood prediction uncertainty resulting from inherent randomness of model inputs/parameters and assessing their impacts on flow system performance. The stochastic moment equations are derived by fully considering and characterizing the temporal and/or spatial variability of the random input functions and solved through numerical finite difference method. The effects of level of variability and persistence of spatio-temporal correlations of input/parameter random functions are evaluated and their relative importances are investigated. Uncertainties associated with the hydraulic unsteady open channel flow model due to random inputs are further incorporated into the reliability assessment and failure consequence analysis of an example flood defense system to demonstrate its usefulness for a more rational planning, design, and decision making. The performance of the proposed PEME model on solving stochastic unsteady open channel flow under random initial conditions, boundary conditions and Manning's roughness coefficient is examined through numerical experiments. The study also developed a second-order correction procedure which shows that it could provide desirable improvement of model prediction accuracy. The PEME model is found to be capable of providing accurate estimations on flow statistics and revealing more physical insights as compared with the MCS approach under small to moderate variability in random inputs and parameters. The computational efficiency of the PEME model depends on the domain size, level of spatial-temporal variability and the types of flow. Under the condition of identical spatial-temporal discretization of the flow domain for the PEME and MCS approaches, the former is computationally superior to latter when the flow is steady or uniform, or one is interested in information for sub-region rather than the entirety, of flow computation domain. This makes the PEME method potentially quite useful in practical engineering applications. In addition, the PEME method shows good potentials for improving computational efficiency through using coarser spatial-temporal discretization of the flow computation domain than that in MCS for the same problem since flow statistics sought by the moment equations are themselves the averaged quantities, which are much smoother. The probabilistic modeling of unsteady open channel flow in the present study provides a…

Subjects/Keywords: Channels (Hydraulic engineering) ; Hydrodynamics ; Stochastic analysis

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APA (6^th Edition):

Lu, Z. (2008). Stochastic modelling of unsteady open channel flow and reliability analysis. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-3602 ; https://doi.org/10.14711/thesis-b1029848 ; http://repository.ust.hk/ir/bitstream/1783.1-3602/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lu, Zhihua. “Stochastic modelling of unsteady open channel flow and reliability analysis.” 2008. Thesis, Hong Kong University of Science and Technology. Accessed March 07, 2021. http://repository.ust.hk/ir/Record/1783.1-3602 ; https://doi.org/10.14711/thesis-b1029848 ; http://repository.ust.hk/ir/bitstream/1783.1-3602/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lu, Zhihua. “Stochastic modelling of unsteady open channel flow and reliability analysis.” 2008. Web. 07 Mar 2021.

Vancouver:

Lu Z. Stochastic modelling of unsteady open channel flow and reliability analysis. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2008. [cited 2021 Mar 07]. Available from: http://repository.ust.hk/ir/Record/1783.1-3602 ; https://doi.org/10.14711/thesis-b1029848 ; http://repository.ust.hk/ir/bitstream/1783.1-3602/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lu Z. Stochastic modelling of unsteady open channel flow and reliability analysis. [Thesis]. Hong Kong University of Science and Technology; 2008. Available from: http://repository.ust.hk/ir/Record/1783.1-3602 ; https://doi.org/10.14711/thesis-b1029848 ; http://repository.ust.hk/ir/bitstream/1783.1-3602/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Otago

3. Fahmy, Muthasim. Theoretical and Experimental Investigations of Transient Rayleigh-Bénard-Marangoni Convection Enhanced Mass Transfer .

Degree: 2012, University of Otago

URL: http://hdl.handle.net/10523/2139

► Convection due to the Rayleigh and Marangoni effects is known to enhance heat and/or mass transfer between two phases by as much as an order… (more)

▼ Convection due to the Rayleigh and Marangoni effects is known to enhance heat and/or mass transfer between two phases by as much as an order of magnitude in industrially important processes. In gas-liquid solute transfer applications this type of convection is often driven by a transient penetration type solute concentration profile. The ability to model solute transfer enhancement under such nonlinear transient concentration profiles works towards the objective of optimising such processes. In this thesis, a model of mass transfer enhancement under Rayleigh-Bénard-Marangoni convection is developed from the soluto-hydrodynamics of a gas-liquid solute transfer system. This model is developed under a penetration type base concentration profile and employing a weakly nonlinear approximation to describe slightly supercritical convection. This work improves upon recent related works by retaining a full nonlinear penetration profile throughout the development of the mass transfer enhancement model. A transient mass transfer enhancement model for roll and hexagonal convection patterns, based on the evolution of autonomous amplitude equations having spatially inhomogeneous advective terms is proposed. The model operates under a quasistatic approximation which is applicable for solute transfer in thin liquid layers. An experimental setup with the necessary sensitivity to study the weakly nonlinear mass transfer regime has been developed and used to test the proposed mass transfer enhancement model. Through numerical investigation of the convective amplitudes, it is shown that the spatially nonhomogeneous advective terms can be neglected when estimating the quasistatic amplitudes of roll and hexagonal convection, provided the planform is apriori known. When this is the case, the error introduced by neglecting the spatially nonhomogeneous terms is in the range 1 to 7%. Numerical investigations also indicate that hexagonal structures with vortex motion down the centre flow, similar to the case of Rayleigh-Bénard convection in a rotating fluid are possible with a penetration type base concentration profile. It is also found that for a large range of operating conditions, roll convection gives higher mass transfer rates over hexagonal convection. Under both roll and hexagonal convection, systems dominated by the Marangoni effect are found to produce the highest mass transfer rates. Furthermore, for any specified gas-liquid system it is possible to optimise the mass transfer enhancement by adjusting the ratio of the Marangoni number to the Rayleigh number. The proposed model of mass transfer enhancement under penetration conditions predicts an exponential-power law relationship between mass transfer enhancement and gas-liquid contact time. This is shown to be in good agreement with experimental measurements in the weakly nonlinear regime of the CO2-isobutanol system. The deviations between measured mass transfer rates and predicted mass transfer rates in this system was found to be between 3.4 and 13.5%. The variations of… Advisors/Committee Members: Sun, Zhifa (advisor).

Subjects/Keywords: Rayleigh effect; Marangoni effect; Transient interfacial convection; Fluctuating hydrodynamics; Stochastic Ginzburg-Landau equations; Heat and mass transfer enhancement

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APA (6^th Edition):

Fahmy, M. (2012). Theoretical and Experimental Investigations of Transient Rayleigh-Bénard-Marangoni Convection Enhanced Mass Transfer . (Doctoral Dissertation). University of Otago. Retrieved from http://hdl.handle.net/10523/2139

Chicago Manual of Style (16^th Edition):

Fahmy, Muthasim. “Theoretical and Experimental Investigations of Transient Rayleigh-Bénard-Marangoni Convection Enhanced Mass Transfer .” 2012. Doctoral Dissertation, University of Otago. Accessed March 07, 2021. http://hdl.handle.net/10523/2139.

MLA Handbook (7^th Edition):

Fahmy, Muthasim. “Theoretical and Experimental Investigations of Transient Rayleigh-Bénard-Marangoni Convection Enhanced Mass Transfer .” 2012. Web. 07 Mar 2021.

Vancouver:

Fahmy M. Theoretical and Experimental Investigations of Transient Rayleigh-Bénard-Marangoni Convection Enhanced Mass Transfer . [Internet] [Doctoral dissertation]. University of Otago; 2012. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10523/2139.

Council of Science Editors:

Fahmy M. Theoretical and Experimental Investigations of Transient Rayleigh-Bénard-Marangoni Convection Enhanced Mass Transfer . [Doctoral Dissertation]. University of Otago; 2012. Available from: http://hdl.handle.net/10523/2139

Louisiana State University

4. Guo, Gang. The effects of local hydrodynamics on mass transfer in disordered porous media.

Degree: PhD, Chemical Engineering, 2002, Louisiana State University

URL: etd-0416102-214517 ; https://digitalcommons.lsu.edu/gradschool_dissertations/2679

► Interfacial mass transfer in disordered media was studied experimentally and numerically. The dissolution of solid benzoic acid spheres in packed columns showed the existence of… (more)

▼ Interfacial mass transfer in disordered media was studied experimentally and numerically. The dissolution of solid benzoic acid spheres in packed columns showed the existence of spatial variations in mass transfer coefficients in monodisperse and polydisperse packings at the same overall Peclet number. The concept of a local Peclet number (single-particle average) was introduced to quantify the effect of local hydrodynamics on local mass transfer. Correlations between Sherwood number and Peclet number having the form Sh_i=A·(x_iPe)^m were used to quantify data from various sites in each packing. These experiments also showed that the exponent m varies significantly from site to site. Stochastic simulations of interfacial dissolution in two-dimensional porous media were conducted, and mass-transfer-coefficient distributions similar to experimental results were obtained. The local velocity profiles available in the numerical simulations allowed a more detailed analysis to be made of local hydrodynamics and their effects on mass transfer. These result showed that mass transfer is affected by both large- and small-scale structure in the material. The large-scale structure affects the magnitude of local velocities and the small-scale structure (e.g., gap spacing between neighboring spheres) affects the shape of local streamlines. Particles exposed to large velocity gradients at their surface and/or particles for which streamline closely hugged their surfaces were observed to have higher rates of mass transfer. The correlation accuracy can be improved when two parameters (local Peclet number x·Pe and exponent z·m) were used in correlation such as Sh=A·(x_iPe)^mz_i. Further analysis showed that there is a strong correlation between x_i and z_i and only one variable is needed to correct both the local Peclet number and the exponent term. A correlation was presented as Sh=A(x_iPe)<sup>0.8965mx_i^-0.158</sup> for the specific data generated in this work. In the future, the use of distributed mass-transfer correlations similar to those presented in this study may improve modeling of NAPL remediation.

Subjects/Keywords: mass transfer; porous media; local hydrodynamics; stochastic; heterogeneous

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Guo, G. (2002). The effects of local hydrodynamics on mass transfer in disordered porous media. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-0416102-214517 ; https://digitalcommons.lsu.edu/gradschool_dissertations/2679

Chicago Manual of Style (16^th Edition):

Guo, Gang. “The effects of local hydrodynamics on mass transfer in disordered porous media.” 2002. Doctoral Dissertation, Louisiana State University. Accessed March 07, 2021. etd-0416102-214517 ; https://digitalcommons.lsu.edu/gradschool_dissertations/2679.

MLA Handbook (7^th Edition):

Guo, Gang. “The effects of local hydrodynamics on mass transfer in disordered porous media.” 2002. Web. 07 Mar 2021.

Vancouver:

Guo G. The effects of local hydrodynamics on mass transfer in disordered porous media. [Internet] [Doctoral dissertation]. Louisiana State University; 2002. [cited 2021 Mar 07]. Available from: etd-0416102-214517 ; https://digitalcommons.lsu.edu/gradschool_dissertations/2679.

Council of Science Editors:

Guo G. The effects of local hydrodynamics on mass transfer in disordered porous media. [Doctoral Dissertation]. Louisiana State University; 2002. Available from: etd-0416102-214517 ; https://digitalcommons.lsu.edu/gradschool_dissertations/2679

University of Illinois – Urbana-Champaign

5. Whitmer, Jonathan K. Dynamics and assembly of colloidal particles.

Degree: PhD, 0240, 2012, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/29467

► In this dissertation, I present research into the dynamics and assembly of colloidal particles. This involves investigations into single particle dynamics, collective dynamics of assembled… (more)

▼ In this dissertation, I present research into the dynamics and assembly of colloidal particles. This involves investigations into single particle dynamics, collective dynamics of assembled clusters, and thermodynamic studies of colloidal superstructure formation. To do this, I have utilized a combination of many simulation and theoretical techniques. Chapter 2 presents a study I have done of the methods in which to implement hydrodynamics into a mesoscopic coarse-grained solvent model (Multiparticle Collision Dynamics). This is done in order that colloidal particles may be studied with hydrodynamics (as is presented in Chapters 4 and 8) in the proper limits. Chapter 3 presents some general considerations for the study of kinetically arrested colloidal gels, which are studied in more detail in Chapters 4 and 5 through molecular dynamics simulations. Chapter 4 considers the structures formed by colloidal particles interacting attractively interact in solvent, while Chapter 5 examines sediment structures formed by attractive particles and their clusters. In Chapter 6, I examine how the presence of patches on the surface of colloidal particles can influence their assembly into superstructures, and the interesting dynamics that can develop in dense systems of such particles, as well as the thermodynamics of specific structure assembly. Further, in Chapter 7, I explain how prototypical two-faced Janus colloids form into elongated helical structures (which are not global free-energy minima) through kinetic pathway selection. Finally, in Chapter 8, I examine how hydrodynamics influences the dynamics of a Janus particle having stick–slip boundary conditions, and examine how this might influence the conformations of clusters, presenting a way to utilize hydrodynamic flows in order to control particle orientations in suspension processing and the manufacture of composite materials. Advisors/Committee Members: Luijten, Erik (advisor), Granick, Steve (Committee Chair), Luijten, Erik (committee member), Dahmen, Karin A. (committee member), Hubler, Alfred W. (committee member).

Subjects/Keywords: Molecular Dynamics; Monte Carlo; Janus Particles; Multiparticle Collision Dynamics (MPC); Stochastic Rotation Dynamics (SRD); hydrodynamics; clusters; depletion potential; Gels; directed assembly; self-assembly; flow control

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Whitmer, J. K. (2012). Dynamics and assembly of colloidal particles. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/29467

Chicago Manual of Style (16^th Edition):

Whitmer, Jonathan K. “Dynamics and assembly of colloidal particles.” 2012. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed March 07, 2021. http://hdl.handle.net/2142/29467.

MLA Handbook (7^th Edition):

Whitmer, Jonathan K. “Dynamics and assembly of colloidal particles.” 2012. Web. 07 Mar 2021.

Vancouver:

Whitmer JK. Dynamics and assembly of colloidal particles. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2012. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2142/29467.

Council of Science Editors:

Whitmer JK. Dynamics and assembly of colloidal particles. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2012. Available from: http://hdl.handle.net/2142/29467

6. Βορτσέλας, Αχιλλεύς. Μοντελοποίηση της φθοράς των μεταλλικών και κεραμικών επιφανειών με τη συνδυασμένη χρήση αριθμητικών προσομοιώσεων και στοχαστικών μοντέλων σε μικροκλίμακα και μακροκλίμακα.

Degree: 2011, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)

URL: http://hdl.handle.net/10442/hedi/27391

► The ultimate goal of wear modelling is the relatively accurate prediction of the wear rate, over a wide range of operational conditions, without the need… (more)

▼ The ultimate goal of wear modelling is the relatively accurate prediction of the wear rate, over a wide range of operational conditions, without the need to recur to wear testing. The current state of the art in tribological modelling may be considered to be still quite far away from this goal, for three main reasons: • The complexity and non-linearity and the cooperative phenomena found in wear mechanisms, related to relatively weak analytical solutions. • The stochastic nature of surface morphology and material properties which inhibit a deterministic approach. • The multiscale nature of wear, since it is essentially a macroscopic manifestation of cooperative micro-, and nanoscale phenomena. The present work presents a combination of novel modelling techniques, focused in addressing the above challenges. A dual-scale model is formulated, with single asperity interactions at the microscale and interaction of surfaces with stochastic morphology at the macroscale. In this multiscale model of sliding wear, the interface is modelled at the macroscale level by a Monte Carlo simulation, which is an excellent method for the easy integration of stochastic functions in multidimensional spaces. The simulation is based on data about the forces, wear volume and topography evolution of the surface for each contact zone, derived from an asperity interaction model in the microscale. Analytical wear models are the basis for the original application of the multiscale approach, so initially an extensive review of them was conducted. The modeling methodologies have been examined, for analytical as well as numerical or multiscale models. The Monte Carlo method has been applied on such models for abrasive, adhesive, fatigue and erosive wear and subsequently integrated into the macroscale model. Meshfree numerical methods, where the flow of nodal masses is not confined by a grid, are considered more suitable than the Finite Element Method to address the complications which arise in a tribosystem. These are large, non-linear deformations, causing severe instability to mesh-based methods, as well as extensive formation of new surfaces, due to crack propagation, fragmentation and wear debris separation. The suitability of various numerical methods in addressing such problems was extensively reviewed. The microscale model is based on a parametric numerical simulation, employing the Smooth Particle Hydrodynamics (SPH) method. The issues arising for the implementation of the SPH method in solving problems of elastic-plastic solids at the microscale (numerical efficiency, tensile instability, mass scaling) have been examined theoretically and solutions have been incorporated in the implementation of the method. Various microscale models have been constructed, in two and three dimensions, along with the respective pre- and post-processing algorithms, in order to be incorporated into a fully automated solution cycle of the multiscale model. The data exchange between the two scales of the model is conducted via interpolation on a map of microscale…

Subjects/Keywords: Τριβολογία; Φθορά; Πολυκλίμακη μοντελοποίηση; Υπολογιστική μηχανική; Στοχαστική προσομοίωση; Μεταλλικά υλικά; Κεραμικά υλικά; Υδροδυναμική ρεόντων σωματιδίων; Tribology; Wear; Multiscale modelling; Computational mechanics; Stochastic simulation; Metallic materials; Ceramic materials; Smooth particle hydrodynamics

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APA (6^th Edition):

Βορτσέλας, . �. (2011). Μοντελοποίηση της φθοράς των μεταλλικών και κεραμικών επιφανειών με τη συνδυασμένη χρήση αριθμητικών προσομοιώσεων και στοχαστικών μοντέλων σε μικροκλίμακα και μακροκλίμακα. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/27391

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Βορτσέλας, Αχιλλεύς. “Μοντελοποίηση της φθοράς των μεταλλικών και κεραμικών επιφανειών με τη συνδυασμένη χρήση αριθμητικών προσομοιώσεων και στοχαστικών μοντέλων σε μικροκλίμακα και μακροκλίμακα.” 2011. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed March 07, 2021. http://hdl.handle.net/10442/hedi/27391.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Βορτσέλας, Αχιλλεύς. “Μοντελοποίηση της φθοράς των μεταλλικών και κεραμικών επιφανειών με τη συνδυασμένη χρήση αριθμητικών προσομοιώσεων και στοχαστικών μοντέλων σε μικροκλίμακα και μακροκλίμακα.” 2011. Web. 07 Mar 2021.

Vancouver:

Βορτσέλας �. Μοντελοποίηση της φθοράς των μεταλλικών και κεραμικών επιφανειών με τη συνδυασμένη χρήση αριθμητικών προσομοιώσεων και στοχαστικών μοντέλων σε μικροκλίμακα και μακροκλίμακα. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2011. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10442/hedi/27391.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Βορτσέλας �. Μοντελοποίηση της φθοράς των μεταλλικών και κεραμικών επιφανειών με τη συνδυασμένη χρήση αριθμητικών προσομοιώσεων και στοχαστικών μοντέλων σε μικροκλίμακα και μακροκλίμακα. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2011. Available from: http://hdl.handle.net/10442/hedi/27391

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

North-West University

7. Strauss, Roelf du Toit. Modelling of cosmic ray modulation in the heliosphere by stochastic processes / Roelf du Toit Strauss .

Degree: 2013, North-West University

URL: http://hdl.handle.net/10394/10217

► The transport of cosmic rays in the heliosphere is studied by making use of a newly developed modulation model. This model employes stochastic differential equations… (more)

Subjects/Keywords: Cosmic rays; Heliosphere; Magneto-hydrodynamics; Stochastic differential equations; Jovian electrons; Charge-sign dependent modulation; Heliopause; Heliospheric current sheet; Propagation times; Particle drifts; Energy losses; Kosmiese strale; Heliosfeer; Magneto-hidrodinamika; Stogastiese differentiaalvergelykings; Jupiter elektrone; Ladingsafhanklike modulasie; Heliopouse; Heliosferiese neutrale vlak; Voortplantingstye; Deeltjie dryf; Energie verliese

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APA (6^th Edition):

Strauss, R. d. T. (2013). Modelling of cosmic ray modulation in the heliosphere by stochastic processes / Roelf du Toit Strauss . (Thesis). North-West University. Retrieved from http://hdl.handle.net/10394/10217

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Strauss, Roelf du Toit. “Modelling of cosmic ray modulation in the heliosphere by stochastic processes / Roelf du Toit Strauss .” 2013. Thesis, North-West University. Accessed March 07, 2021. http://hdl.handle.net/10394/10217.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Strauss, Roelf du Toit. “Modelling of cosmic ray modulation in the heliosphere by stochastic processes / Roelf du Toit Strauss .” 2013. Web. 07 Mar 2021.

Vancouver:

Strauss RdT. Modelling of cosmic ray modulation in the heliosphere by stochastic processes / Roelf du Toit Strauss . [Internet] [Thesis]. North-West University; 2013. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10394/10217.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Strauss RdT. Modelling of cosmic ray modulation in the heliosphere by stochastic processes / Roelf du Toit Strauss . [Thesis]. North-West University; 2013. Available from: http://hdl.handle.net/10394/10217

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

8. Xiang, Gong. Motion Dynamics of Dropped Cylindrical Objects.

Degree: PhD, Naval Architecture and Marine Engineering, 2017, University of New Orleans

URL: https://scholarworks.uno.edu/td/2340

► Dropped objects are among the top ten causes of fatalities and serious injuries in the oil and gas industry. Objects may be dropped during… (more)

▼ Dropped objects are among the top ten causes of fatalities and serious injuries in the oil and gas industry. Objects may be dropped during lifting or any other offshore operation. Concerns of health, safety, and the environment (HSE) as well as possible damages to structures require the prediction of where and how a dropped object moves underwater. This study of dropped objects is subdivided into three parts. In the first part, the experimental and simulated results published by Aanesland (1987) have been successfully reproduced and validated based on a two-dimensional (2D) theory for a dropped drilling pipe model. A new three-dimensional (3D) theory is proposed to consider the effect of axial rotation on dropped cylindrical objects. The 3D method is based on a modified slender body theory for maneuvering. A numerical tool called Dropped Objects Simulator (DROBS) has been developed based on this 3D theory. Firstly, simulated results of a dropped drilling pipe model using a 2D theory by Aanesland (1987) are compared with results from 3D theory when rolling frequency is zero. Good agreement is found. Further, factors that affect the trajectory, such as drop angle, normal drag coefficient, binormal drag coefficient, and rolling frequency are systematically investigated. It is found that drop angle, normal drag coefficient, and rolling frequency are the three most critical factors determining the trajectories. In the second part, a more general three-dimensional (3D) theory is proposed to physically simulate the dynamic motion of a dropped cylindrical object underwater with different longitudinal center of gravity (LCG). DROBS has been further developed based on this 3D theory. It is initially applied to a dropped cylinder with LCG = 0 (cylinder1) falling from the surface of calm water. The calculated trajectories match very well with both the experimental and numerical results published in Aanesland (1987). Then DROBS is further utilized to simulate two dropped cylinders with positive LCG (cylinder #2) and negative LCG (cylinder #3) in Chu et al. (2005), respectively. The simulated results from DROBS show a better agreement with the measured data than the numerical results given in Chu et al. (2005). This comparison again validates and indicates the effectiveness of the DROBS program. Finally, it’s applied to investigate the effects of varying LCG on the trajectory and landing points. Therefore, the newly developed DROBS program could be used to simulate the distribution of landing points of dropped cylindrical objects, as is very valuable in the risk-free zone prediction in offshore engineering. The third part investigates the dynamic motion of a dropped cylindrical object under current. A numerical procedure is developed and integrated into Dropped Objects Simulator (DROBS). DROBS is utilized to simulate the trajectories of a cylinder when dropped into currents from different directions (incoming angle at 0o; 90o; 180o; and 270o) and with different amplitudes (0m/s to 1.0m/s). It is found that trajectories… Advisors/Committee Members: Lothar Birk, Xiaochuan Yu, Brandon Taravella.

Subjects/Keywords: Ocean Engineering; Motion Dynamics; Hydrodynamics; Trajectory; Stochastic Model; Risk Free Zone; Ocean Engineering; Risk Analysis

…5.24 5.25 5.26 5.27 5.28 5.29 5.30 5.31 Schematic showing the principal of stochastic… …water are modeled as a stochastic process. Therefore, the related parameters, including the… …than study on the deterministic 3D theory of the dropped cylinder, a stochastic model is… …total hydrodynamics force is derived by integrating Eq. (3.4) which is initially…

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APA (6^th Edition):

Xiang, G. (2017). Motion Dynamics of Dropped Cylindrical Objects. (Doctoral Dissertation). University of New Orleans. Retrieved from https://scholarworks.uno.edu/td/2340

Chicago Manual of Style (16^th Edition):

Xiang, Gong. “Motion Dynamics of Dropped Cylindrical Objects.” 2017. Doctoral Dissertation, University of New Orleans. Accessed March 07, 2021. https://scholarworks.uno.edu/td/2340.

MLA Handbook (7^th Edition):

Xiang, Gong. “Motion Dynamics of Dropped Cylindrical Objects.” 2017. Web. 07 Mar 2021.

Vancouver:

Xiang G. Motion Dynamics of Dropped Cylindrical Objects. [Internet] [Doctoral dissertation]. University of New Orleans; 2017. [cited 2021 Mar 07]. Available from: https://scholarworks.uno.edu/td/2340.

Council of Science Editors:

Xiang G. Motion Dynamics of Dropped Cylindrical Objects. [Doctoral Dissertation]. University of New Orleans; 2017. Available from: https://scholarworks.uno.edu/td/2340

9. Lallouet, Yoann. Différents aspects de la physique nucléaire depuis les basses énergies jusqu'aux énergies intermédiaires : Different aspects of nuclear physics from low energies up to intermediate energies.

Degree: Docteur es, Physique nucléaire théorique, 2011, Université Claude Bernard – Lyon I

URL: http://www.theses.fr/2011LYO10286

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Cette thèse porte sur l'étude de différents aspects de la physique nucléaire depuis les basses énergies jusqu'aux énergies intermédiaires. Pour les basses énergies, où la… (more)

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Cette thèse porte sur l'étude de différents aspects de la physique nucléaire depuis les basses énergies jusqu'aux énergies intermédiaires. Pour les basses énergies, où la matière nucléaire est essentiellement constituée de nucléons en interaction, la partie I traite de la fusion-fission des noyaux super-lourds, et la partie II des règles de somme associées aux interactions de type Skyrme. Pour les énergies intermédiaires, la matière nucléaire étant alors considérée comme une phase hadronique principalement constituée de pions, la partie III se focalise sur l'hydrodynamique relativiste de la matière nucléaire avec brisure spontanée de symétrie chirale. Dans la partie I, on s'intéresse à la formation puis à la désexcitation des noyaux super-lourds. On étudie donc la formation du noyau composé avec effets de mémoire. Pour la désexcitation d'un noyau super-lourd, l'existence d'un puits isomérique dans la barrière de potentiel change la dynamique de désexcitation et augmente les temps de fission. Cette dernière étude pourrait être utile à l'étude de la dynamique de la fission des actinides. Dans la partie II, les règles de somme M1 et M3 associées aux potentiels phénoménologiques de type Skyrme sont calculées à partir de leurs définitions intrinsèques. On détermine alors M1 jusqu'au niveau tensoriel et M3 avec potentiel central. Dans la partie III, pour le traitement hydrodynamique de la matière hadronique appliqué aux collisions d'ions lourds on peut, en première approximation, écarter les modifications induites par la brisure spontanée de symétrie chirale mais pas celles dues à l'aspect dissipatif.

This study focuses on different aspects of nuclear physics from low energies to intermediate ones. For the low energies, the nuclear matter is essentially constituted from interacting nucleons. Part I is on the fusion-fission of super-heavy elements, while Part II is on the Skyrme interactions-associated sum rules. In the case of the intermediate energies, where the nuclear matter is considered as being an hadronic phase mainly constituted from pions, Part III is focused on nuclear matter relativistic hydrodynamics with spontaneous chiral symmetry breaking. In Part I, the formation and the desexcitation of super-heavy nuclei are being studied. We analyzed the formation of compound nuclei including the memory effects. For super-heavy nuclei desexcitation, the existence of isomeric state within the potential barrier modifies the desexcitation dynamics and increases the fission time. This latter study could be useful for the study of the actinides fission. In Part II, the phenomenological Skyrme effective interactions- associated M1 and M3 sum rules are being calculated based on their intrinsic definitions. We identify then M1 up to the tensorial level and M3 with central potential. In Part III, as for the hadronic matter hydrodynamics being applied to heavy ions collisions, and as a first approach only, we can neglect spontaneous chiral symmetry but certainly not the dissipative impact.

Advisors/Committee Members: Davesne, Dany (thesis director), Boilley, David (thesis director).

Subjects/Keywords: Collisions d'ions lourds; Eléments super-lourds; Bosons de Goldstone; Diffusion stochastique; Effets de mémoire; Désexcitation; Temps de fission; Forces de Skyrme; Règles de somme; Critères de stabilité; Symétrie chirale; Matière hadronique; Hydrodynamique relativiste; Heavy-ions collisions; Super-heavy elements; Goldstone bosons; Stochastic diffusion; Memory effects; Desexcitation; Fission time; Isomeric states; Skyrme forces; Sum rules; Stability criterion; Chiral symmetry; Hadronic mater; Relativistic hydrodynamics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lallouet, Y. (2011). Différents aspects de la physique nucléaire depuis les basses énergies jusqu'aux énergies intermédiaires : Different aspects of nuclear physics from low energies up to intermediate energies. (Doctoral Dissertation). Université Claude Bernard – Lyon I. Retrieved from http://www.theses.fr/2011LYO10286

Chicago Manual of Style (16^th Edition):

Lallouet, Yoann. “Différents aspects de la physique nucléaire depuis les basses énergies jusqu'aux énergies intermédiaires : Different aspects of nuclear physics from low energies up to intermediate energies.” 2011. Doctoral Dissertation, Université Claude Bernard – Lyon I. Accessed March 07, 2021. http://www.theses.fr/2011LYO10286.

MLA Handbook (7^th Edition):

Lallouet, Yoann. “Différents aspects de la physique nucléaire depuis les basses énergies jusqu'aux énergies intermédiaires : Different aspects of nuclear physics from low energies up to intermediate energies.” 2011. Web. 07 Mar 2021.

Vancouver:

Lallouet Y. Différents aspects de la physique nucléaire depuis les basses énergies jusqu'aux énergies intermédiaires : Different aspects of nuclear physics from low energies up to intermediate energies. [Internet] [Doctoral dissertation]. Université Claude Bernard – Lyon I; 2011. [cited 2021 Mar 07]. Available from: http://www.theses.fr/2011LYO10286.

Council of Science Editors:

Lallouet Y. Différents aspects de la physique nucléaire depuis les basses énergies jusqu'aux énergies intermédiaires : Different aspects of nuclear physics from low energies up to intermediate energies. [Doctoral Dissertation]. Université Claude Bernard – Lyon I; 2011. Available from: http://www.theses.fr/2011LYO10286

Indian Institute of Science

10. Das, Moumita. Ordering, Stochasticity, And Rheology In Sheared And Confined Complex Fluids.

Degree: PhD, Faculty of Science, 2011, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/2005/1334

Subjects/Keywords: Fluid Mechanics; Fluid Rheology; Fluid - Stochastic Analysis; Complex Fluids; Confined Fluids; Nematic Hydrodynamics; Nematogenic Fluids; Nanotubes; Soft Sliding Bilayers; Nematodynamics; Fluid Mechanics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Das, M. (2011). Ordering, Stochasticity, And Rheology In Sheared And Confined Complex Fluids. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/1334

Chicago Manual of Style (16^th Edition):

Das, Moumita. “Ordering, Stochasticity, And Rheology In Sheared And Confined Complex Fluids.” 2011. Doctoral Dissertation, Indian Institute of Science. Accessed March 07, 2021. http://etd.iisc.ac.in/handle/2005/1334.

MLA Handbook (7^th Edition):

Das, Moumita. “Ordering, Stochasticity, And Rheology In Sheared And Confined Complex Fluids.” 2011. Web. 07 Mar 2021.

Vancouver:

Das M. Ordering, Stochasticity, And Rheology In Sheared And Confined Complex Fluids. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2011. [cited 2021 Mar 07]. Available from: http://etd.iisc.ac.in/handle/2005/1334.

Council of Science Editors:

Das M. Ordering, Stochasticity, And Rheology In Sheared And Confined Complex Fluids. [Doctoral Dissertation]. Indian Institute of Science; 2011. Available from: http://etd.iisc.ac.in/handle/2005/1334

Delft University of Technology

11. Oosterlo, P. (author). A method to calculate the probability of dike failure due to wave overtopping, including the infragravity waves and morphological changes.

Degree: 2015, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:4c139e62-cc55-4013-844f-ad5d5ab62e29

► In this thesis, a method was developed, with which the infragravity waves and morphological changes of a sandy foreshore are included in the calculation of… (more)

▼ In this thesis, a method was developed, with which the infragravity waves and morphological changes of a sandy foreshore are included in the calculation of the probability of dike failure due to wave overtopping. Constructing a natural foreshore in front of the dike can be an attractive and innovative method to decrease the failure probability. However, the uncertainty in the morphological development of these foreshores leads to uncertainty with respect to their contribution in protection against flooding. The morphological stability of a foreshore during extreme conditions is not well known. The current Dutch safety assessment tools do not yet include the infragravity waves and morphological changes of a foreshore during a storm. Hence, it is not yet possible to guarantee the robustness and safety of dike-foreshore system. This thesis considered hybrid defences (dike-foreshore systems), where the dike is still of importance in the protection of the hinterland. The considered hybrid defence was a schematized version of the Westkapelle sea defence, located at the coast of Walcheren in the Netherlands. The morphological changes of the foreshore calculated in this thesis, were the changes during (severe) storms. Because a single model that includes all the different relevant processes does not exist, a model framework or ‘model train’ was developed, in which different models were combined. The modelling framework best fit to solve the research questions was determined as a combination of XBeach hydrostatic, the EurOtop formulae and the probabilistic method Adaptive Directional Importance Sampling (ADIS). Including infragravity waves (and wave set-up) lead to much larger failure probabilities for the hybrid defence considered in this thesis. This difference is mainly caused by the difference in wave period at the toe of the dike. Including the morphological changes lead to a somewhat larger failure probability. The fact that this difference was not that large, was mainly caused by less wave dissipation due to erosion of the foreshore, but at the same time less transfer of energy to the low frequencies, thus a smaller wave period. The combination of a (very) shallow foreshore and dike slope of 1:8 make that the case considered here is (largely) outside the previously studied wave overtopping area. It is possible, that when the wave period becomes very large, the wave overtopping is not dependent anymore on the dike slope, but on the wave parameters only. It is therefore questionable if the EurOtop formulae calculate the right amount of wave overtopping for these types of situations, because in the formulae, the wave overtopping is dependent on the dike slope. Furthermore, the EurOtop formulae use the Tm-1,0 wave period. This wave period is very sensitive to the low frequencies. Clear guidelines should be determined on which frequency resolution and, if necessary, cut-off frequencies should be used when determining wave spectra. This thesis presented a method with which infragravity waves and morphological changes of a… Advisors/Committee Members: Jonkman, S.N. (mentor), Van der Meer, J.W. (mentor), McCall, R. (mentor), Vuik, V. (mentor), Verhagen, H.J. (mentor).

Subjects/Keywords: dikes; flood defences; wave overtopping; infragravity waves; morphology; probabilistic; foreshores; overtopping; morphological changes; soft solutions; Building with Nature; levees; dike-foreshore system; safety assessment; stochastic; XBeach; EurOtop; Adaptive Directional Importance Sampling; ADIS; hybrid defences; flood risk; BE-SAFE; hydrodynamics; probability of failure; reliability function; shallow foreshore; Westkapelle; sea defence; wave period; wave spectra

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Oosterlo, P. (. (2015). A method to calculate the probability of dike failure due to wave overtopping, including the infragravity waves and morphological changes. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:4c139e62-cc55-4013-844f-ad5d5ab62e29

Chicago Manual of Style (16^th Edition):

Oosterlo, P (author). “A method to calculate the probability of dike failure due to wave overtopping, including the infragravity waves and morphological changes.” 2015. Masters Thesis, Delft University of Technology. Accessed March 07, 2021. http://resolver.tudelft.nl/uuid:4c139e62-cc55-4013-844f-ad5d5ab62e29.

MLA Handbook (7^th Edition):

Oosterlo, P (author). “A method to calculate the probability of dike failure due to wave overtopping, including the infragravity waves and morphological changes.” 2015. Web. 07 Mar 2021.

Vancouver:

Oosterlo P(. A method to calculate the probability of dike failure due to wave overtopping, including the infragravity waves and morphological changes. [Internet] [Masters thesis]. Delft University of Technology; 2015. [cited 2021 Mar 07]. Available from: http://resolver.tudelft.nl/uuid:4c139e62-cc55-4013-844f-ad5d5ab62e29.

Council of Science Editors:

Oosterlo P(. A method to calculate the probability of dike failure due to wave overtopping, including the infragravity waves and morphological changes. [Masters Thesis]. Delft University of Technology; 2015. Available from: http://resolver.tudelft.nl/uuid:4c139e62-cc55-4013-844f-ad5d5ab62e29

Open Access Theses and Dissertations