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International Journal of Fluid Mechanics Research
ESCI SJR: 0.22 SNIP: 0.446 CiteScore™: 0.5

ISSN Print: 2152-5102
ISSN Online: 2152-5110

International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v25.i1-3.130
pages 144-155

Friction Factor and Heat Transfer Correlations for Gaseous Reactant Flow in Fuel Cell Power Modules

G. J. Hwang
Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan
Y. C. Cheng
Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan
Moses L. Ng
Energy and Resources Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan

ABSTRACT

To simulate the hydrodynamic and thermal behavior of the gaseous flows in fuel cells, a numerical study was made to investigate the forced laminar convection in the entrance region of a square duct with one wall subjected to uniform mass transpiration and constant wall heat flux. Typical velocity and temperature distributions along the flow direction are reported, as well as the correlations for hydrodynamic and thermal entrance lengths are proposed. Effects of fluid injection and suction on the pressure gradient, bulk mean temperature, friction factor and Nusselt number are all examined. Both local friction factor and Nusselt number correlations in the developing and developed regions are also obtained for using in engineering design and thermal control of fuel cell stacks.


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