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You searched for subject:(thermodynamic analogue). Showing records 1 – 2 of 2 total matches.

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1. Masy, E. Predicting the diffusivity of CO2 in substituted amines:.

Degree: 2013, Delft University of Technology

The experimental determination of the diffusivity of carbon dioxide (CO2) in an amine solvent is difficult as the CO2 diffuses and reacts simultaneously when absorbed into an amine solvent. As the knowledge of the diffusivity and solubility of CO2 is essential to design the absorption units based on amine solvents, the nitrous oxide (N2O) analogy is used in practice to estimate them. It consists of evaluating those physical properties by substituting the reacting CO2 with an inert gas of a similar structure, N2O. The diffusion of CO2 in amine solvents is investigated using molecular dynamics (MD) simulation. Unlike experiments, MD simulation allows a direct measurement of the CO2 diffusivity. In MD simulations, the reaction between CO2 and the amine can be switched off. The Fick diffusion coeffcients are derived from the Maxwell-Stefan diffusivities and the thermodynamic factors. Different amine solvents like monoethanolamine, diethanolamine, methyl-diethanolamine and ethylamine are investigated. The N2O analogy in the monoethanolamine-water solution has been validated. Advisors/Committee Members: Balaji, S.P..

Subjects/Keywords: diffusion; amine; CO2 absorption; N2O analog; Maxwell-Stefan diffusivity; thermodynamic factor; molecular dynamic simulations

thermodynamic factors [20–23]. The elements of matrix [B], which have no physical… …thermodynamic factors. They represent the deviation from the ideality and are given by ∂ ln γi ∂x j Γ… …Coefficients 1.4.1 Maxwell Stefan Diffusivities It is possible to compute thermodynamic properties… …x5B;23]. 1.4.2 Thermodynamic Factors It is possible to express many thermodynamic… …37], the thermodynamic factor, Γ is calculated by Γ = 1 − x1 c2 (G11 + G22… 

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

APA (6th Edition):

Masy, E. (2013). Predicting the diffusivity of CO2 in substituted amines:. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:eb02394d-4321-47c1-b79c-086e393f7307

Chicago Manual of Style (16th Edition):

Masy, E. “Predicting the diffusivity of CO2 in substituted amines:.” 2013. Masters Thesis, Delft University of Technology. Accessed January 25, 2020. http://resolver.tudelft.nl/uuid:eb02394d-4321-47c1-b79c-086e393f7307.

MLA Handbook (7th Edition):

Masy, E. “Predicting the diffusivity of CO2 in substituted amines:.” 2013. Web. 25 Jan 2020.

Vancouver:

Masy E. Predicting the diffusivity of CO2 in substituted amines:. [Internet] [Masters thesis]. Delft University of Technology; 2013. [cited 2020 Jan 25]. Available from: http://resolver.tudelft.nl/uuid:eb02394d-4321-47c1-b79c-086e393f7307.

Council of Science Editors:

Masy E. Predicting the diffusivity of CO2 in substituted amines:. [Masters Thesis]. Delft University of Technology; 2013. Available from: http://resolver.tudelft.nl/uuid:eb02394d-4321-47c1-b79c-086e393f7307


Texas A&M University

2. Zhang, Xiong. Consolidation theories for saturated-unsaturated soils and numerical simulation of residential buildings on expansive soils.

Degree: 2005, Texas A&M University

The coupled and uncoupled consolidation theories for saturated-unsaturated soils have been discussed. A new method for constructing the constitutive surfaces for saturated-unsaturated soils has been proposed. The consolidation processes for saturated-unsaturated soils have been explained by thermodynamic analogue. One dimensional consolidation theory for saturated-unsaturated soils is presented and a new method is proposed to calculate the immediate settlement, total settlement and the time history of the consolidation settlement manually in the same way as what we have done for saturated soils with a higher accuracy. It makes the consolidation theory of unsaturated soils as applicable as that of saturated soils. This method can also be used to perform uncoupled two or three dimensional consolidation calculation for both expansive soils and collapsible soils. From the analysis, the equivalent effective stress and excessive pore water pressure can be easily calculated. At the same time, the physical meanings for the parameters in the constitutive laws for saturated-unsaturated are illustrated. A new set of the differential equations for the coupled two or three dimensional consolidation of saturated-unsaturated soils are proposed, together with the corresponding method to solve the differential equations. It is also proved numerically and analytically that during the consolidation process the Mandel-Cryer effect exists for unsaturated expansive soils and there is a ??reverse?? Mandel-Cryer effect for unsaturated collapsible soils. A new method is proposed to estimate the volume change of expansive soils. A complete system is proposed for the numerical simulation of residential buildings on expansive soils. The strength of this method lies in its use of simple and readily available historic weather data such as daily temperature, solar radiation, relative humidity, wind speed and rainfall as input. Accurate three dimensional predictions are obtained by integrating a number of different analytical and numerical techniques: different simulation methods for different boundary conditions such as tree, grass, and bare soils, coupled hydro-mechanical stress analysis to describe deformation of saturated-unsaturated soils, jointed elements simulation of soil-structure interaction, analysis of structure stress moment by general shell elements, and to assess structural damage by the smeared cracking model. The real-time and dynamic simulation results are consistent with filed measurements. Advisors/Committee Members: Briaud, Jean-Louis (advisor), Palazzolo, Alan (committee member), Aubeny, Charles (committee member), Lytton, Robert L. (committee member).

Subjects/Keywords: consolidation; Unsaturated Soils; Numerical Simulation; Residential Buildings; Expansive Soils; constitutive surfaces; thermodynamic analogue; collapsible soils; Mandel-Cryer effect; boundary conditions; soil-structure interaction; shell elements; smeared model

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

APA (6th Edition):

Zhang, X. (2005). Consolidation theories for saturated-unsaturated soils and numerical simulation of residential buildings on expansive soils. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/2747

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):

Zhang, Xiong. “Consolidation theories for saturated-unsaturated soils and numerical simulation of residential buildings on expansive soils.” 2005. Thesis, Texas A&M University. Accessed January 25, 2020. http://hdl.handle.net/1969.1/2747.

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

MLA Handbook (7th Edition):

Zhang, Xiong. “Consolidation theories for saturated-unsaturated soils and numerical simulation of residential buildings on expansive soils.” 2005. Web. 25 Jan 2020.

Vancouver:

Zhang X. Consolidation theories for saturated-unsaturated soils and numerical simulation of residential buildings on expansive soils. [Internet] [Thesis]. Texas A&M University; 2005. [cited 2020 Jan 25]. Available from: http://hdl.handle.net/1969.1/2747.

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

Council of Science Editors:

Zhang X. Consolidation theories for saturated-unsaturated soils and numerical simulation of residential buildings on expansive soils. [Thesis]. Texas A&M University; 2005. Available from: http://hdl.handle.net/1969.1/2747

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

.