Pore-Scale Network Models And Their Applications To Capillary Evaporators And Gas Diffusion Layers Of PEM Fuel Cells
Two-phase flows in porous media are encountered in many situations, in relation with technological applications or natural processes. Traditionally, the modeling of this type of flow is addressed using phenomenological approaches in which the porous medium is a fictitious continuum. Owing to the limitations of the traditional approaches, recent works have used instead pore network models (PNMs). PNMs can be used for various objectives, for example to compute effective transport properties. Here we show, in relation with the study of fuel cells and capillary evaporators, how PNMs can be used to understand multiphase flow without or with phase change in a porous medium. The fuel cell related example illustrates the problems posed by thin systems, a class of system for which continuum models are likely to lead to poor predictions. The study of transfers within the wick of capillary evaporators shows how PNMs can be used to optimize a system or part of a system in an engineering perspective.
Porous Media Multiphase Flow Heat and Mass Transfer Energy Conversion
M.Prat
Universite de Toulouse,INPT, UPS,IMFT Avenue Camille Soula - F 31400 CNRS,IMFT-F 31400
国际会议
西安
英文
49-55
2009-07-11（万方平台首次上网日期，不代表论文的发表时间）