J0560101 PEFCガス拡散層内の凝縮水挙動に関する高速格子ボルツマン解析

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  • J0560101 High-Speed LBM Simulation of Condensed Water Behavior in PEFC Gas Diffusion Layers

抄録

In PEFC, flooding phenomena is one of the critical problems to be solved. Therefore, it is necessary to optimize water and reactant gas flow management in the cell. Our research group applied the lattice Boltzmann method (LBM) for the two phase flow with high density ratio, including the effect of wettability, and has carried out the analyses of gas and liquid water flow to propose the gas diffusion layer (GDL) with the high water draining capability. In this study, we simulated liquid water behavior inside of the GDL applying the equal density LBM in order to achieve shorter computational time comparing to the high density ratio LBM. In the equal density LBM code developed by the authors, we found two problems. One was a decrease in amount of water in the GDL, and the other was discriminating liquid water behavior compared with in the high density ratio LBM. This paper explains the applied improvements to solve these two problems by setting the wall boundary conditions appropriately.

収録刊行物

  • 年次大会

    年次大会 2015 (0), _J0560101--_J0560101-, 2015

    一般社団法人 日本機械学会

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