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International Heat Transfer Conference 15

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

A Coupling Scheme of Lattice Boltzmann Method and Finite Volume Method for Multi-Component Diffusion Processes

Zi-Xiang Tong
Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, No.28 Xianning West Road, Xi'an, Shaanxi, 710049, P.R. China

Ya-Ling He
Key Laboratory of Thermo-fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China

Wei-Wei Yang
School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049 China

Wen-Quan Tao
State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, China; Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xian Jiaotong University, Xian 710049, China

DOI: 10.1615/IHTC15.mlt.009499
pages 5021-5035


MOTS CLÉS: Computational methods, Fuel cell, porous media, multi-component diffusion, lattice Boltzmann method, finite volume method

Résumé

The coupling method between the lattice Boltzmann method (LBM) and the finite volume method (FVM) is proposed for the multiscale multi-component diffusion processes. A reconstruction operator is derived for the information transfer from LBM to FVM and the computational procedure is described. The method is validated by the simulation of the two-dimensional opposed jet flow. The mass transfer in the GC and the anode of a SOFC is then studied by the coupling method where three different anode porous structures which are isotropic, grown parallel or perpendicular to the diffusion direction are studied. An optimization of the porous structures which simulate the evolution of the channels is further adopted. The results show that the thickness, porosity and orientation of the anode structures influence the mass transfer together and the structure grown parallel to the diffusion direction is preferred. The example shows the efficiency and flexibility of the multi-component coupling method in dealing with the multiscale diffusion problems.

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