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PEM Fuel Cells by Ken S. Chen, Yun Wang

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Appendix VI.A

Governing Equations of Multiphase Flow and Heat Transfer In Porous Media*

This appendix provides a quick summary of the governing equations for multiphase flow and heat transfer in porous media.

1. Mass conservation in phase k:

41598.jpg (Eq. A.6-a1)

where e is the porosity of the porous medium, sk is the phase saturation or the volumetric fraction of the void space occupied by phase k, and 41565.jpg is the superficial (or Darcian) velocity based on the total cross-sectional area of the porous medium, including the void space and solid matrix. The ...

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