Maxwell–Stefan diffusion asymptotics for gas mixtures in non-isothermal setting

Maxwell-stefan Diffusion Asymptotics for Gas Mixtures in Non-isothermal Setting

Abstract. A mathematical model is proposed where the classical Maxwell-Stefan diffusion model for gas mixtures is coupled to an advection-type equation for the temperature of the physical system. This coupled system is derived from first principles in the sense that the starting point of our analysis is a system of Boltzmann equations for gaseous mixtures. We perform an asymptotic analysis on t...

Modeling and Optimization of non - isothermal two- phase flow in the cathode gas diffusion layer of PEM fuel cell

In this paper, a non-isothermal two-phase flow in the cathode gas diffusion layer (GDL) of PEM fuel cell is modeled. The governing equations including energy, mass and momentum conservation equations are solved by numerical methods. Also, the optimal values of the effective parameters such as the electrodes porosity, gas diffusion layer (GDL) thickness and inlet relative humidity are calculated...

Thermal Diffusion Columns for Gas Mixtures

and the lepton interactions on the other hand. We note further that the quantities xpr C yx ip and ipT C yxy5y> are covariants not only under real but also under special complex transformation as can be proved easily by using relation (8 c). As to the quantization, we have already remarked above, that one can perhaps make use of the linearity of the field equation in the “intrinsic” system by w...

Statistical Thermodynamics of Material Transport in Non-Isothermal Mixtures

Modified Kremser Equation for Plate Type Gas Absorberin Non-Isothermal Operation (RESEARCH NOTE).

For non-isothermal operation in plate type gas absorber, the temperature changes and number of ideal trays can be determined with recourse to graphical method. In this paper there is an analysis illustrating that a Modified Kremser Equation can be used for plate type gas absorber in non-isothermal operation.