Lattice Boltzmann modeling of two component gas diffusion in solid oxide fuel cell

Document Type : Research Paper


1 K.N.toosi university of technology

2 University of California, Riverside


In recent years, the need for high efficiency and low emission power generation systems has made much attention to the use of fuel cell technology. The solid oxide fuel cells due to their high operating temperature (800 ℃ -1000 ℃) are suitable for power generation systems.
Two-component gas flow (H2 and H2O) in the porous media of solid oxide fuel cell’s anode have been modeled via lattice Boltzmann method; molecular distributions of the components are evaluated and the concentration voltage drop is investigated. The results of voltage drop in different current densities are validated with previous studies. Then the effects of various parameters such as porosity and non-dimensional current density on the gas diffusion of H2 and H2O, and also the concentration voltage drop in the porous anode are evaluated. It is revealed that at a specific non-dimensional current density, reducing porosity causes increasing H2 concentration in anode and concentration voltage loss. To apply the CFD model, a computer program in MATLAB has been used.


Main Subjects

[1] Rothman DH, Keller JM., Immiscible cellular-automaton fluids, J. Stat. Phys. 52: 1119–27, 1988.
[2] P. Nithiarasu, K.N. Seetharamu, and T. Sundararajan, Int. J. Heat Mass Transf. 40, 3955 (1997).
[3] Z. Guo, T.S. Zhao, Lattice Boltzmann model for incompressible flows through porous media, Phys. Rev. E 68 (2003) 035302.
[4] S. Chen & G. D. Doolen, Lattice Boltzmann method for fluid flows, A. Rev. Fluid Mech. 30, (1998) 329-74.
[5] Z. Guo, C. Zheng, and B. Shi, Phys. Rev. E 65, 046308, 2002.
[6] H. Hayashi, Lattice Boltzmann method end its aplication to flow analysis in porous media, R&D Review of toyota CRDL Vol.38, 2007.
[7] M. C. Sukop, D. T. Thorne, Lattice Boltzmann modeling An introduction for geoscientists and engineers.
[8] R. R. Nourgaliev et al., The Lattice Boltzmann Equation Method: Theoretical Interpretation, Numerics and Implications, Center for Risk Studies and Safety, University of California.
[9] A. S. Joshi, K. N. Grew, A. A. Peracchio, W. K. S. Chiu, Lattice Boltzmann modeling of 2D gas transport in a solid oxide fuel cell anode, J. Power Sources 164 (2007) 631–638.
[10] B. Sunden and M. Faghri, Transport phenpmena in fuelcells, WITPRESS, 2005.
[11] R. O'Hayre, S-W. Cha, W. Colella and F. B. Prinz, Fuel cell fundamentals, John Wiley & Sons, Inc, 2009.
[12] Q. Zou and X. He, Pressure and Velocity boundary conditions for the lattice Boltzmann BGK model, Phys. Fluids. 9, 1591-1598, 1997.
[13] S. Chen, D. Martinez, On boundary conditions in lattice Boltzmann methods, Phys. fluids. 8, 2527-2536, 1996.
[14] D. A. Wolf-Gladrow, Lattice-Gas cellular automata and Lattice Boltzmann models an introduction, Springer, 2005.
[15] M. C. Sukop, D. T. Thorne, Lattice Boltzmann modeling an introduction for geoscientists and engineers.
[16] S.H. Chan, K.A. Khor, Z.T. Xia, A complete polarization model of a solid oxide fuel cell and its sensitivity to the change of cell component thickness, J. Power Sources 93 (2001) 130–140.
[17] F. Zhao, A.V. Virkar, Dependence of polarization in anode-supported solid oxide fuel cells on various cell parameters, J. Power Sources 141 (2005) 79–95.