TY - JOUR
ID - 905
TI - Lattice Boltzmann simulation of water transfer in gas diffusion layers with porosity gradient of polymer electrolyte membrane fuel cells with parallel processing on GPU
JO - Iranian Journal of Hydrogen & Fuel Cell
JA - IJHFC
LA - en
SN - 2383-160X
AU - habiballahi, mohammad
AU - Hassanzadeh, Hassan
AU - rahnama, mohammad
AU - mirbozorgi, seyed ali
AU - Jahanshahi Javaran, Ebrahim
AD - Department of Mechanical Engineering, University of Birjand, Birjand, Iran
AD - Department of Mechanical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
AD - Department of Energy, Graduate University of Advanced Technology, Kerman, Iran
Y1 - 2020
PY - 2020
VL - 7
IS - 1
SP - 45
EP - 60
KW - PEM fuel cell
KW - Lattice Boltzmann Method
KW - Gas Diffusion Layer
KW - two-phase flow
KW - GPU parallel processing
KW - porosity gradient
DO - 10.22104/ijhfc.2020.4056.1201
N2 - This study used the lattice Boltzmann method (LBM) to evaluate water distribution in the gas diffusion layer (GDL) of cathode PEM fuel cells (PEMFCs) with porosity gradient. Due to the LBMâ€™s capability of parallel processing with a GPU and the high volume of computing necessary, especially for small grids, the GPU parallel processing was done on a graphics card with the help of CUDA to speed up computing. The two-phase flow boundary conditions in the GDL are similar to the water transfer in the GDL of the PEMFCs. The results show that capillary force is the main cause of water transfer in the GDL, and gravity has little effect on the water transfer. Also, the use of GPU parallel processing on the graphics card increases the computation speed up to 17 times, which has a significant effect on running time. To investigate the gradient of porosity of GDLs with different porosity gradients, but the same average porosity coefficient and the same particle diameter have been evaluated. The simulation results show that the GDL with a 10% porosity gradient compared to the GDL with uniform porosity results in a 20.2% reduction in the amount of liquid water in the porous layer. Hence, increasing the porosity gradient of the GDL, further decreases the amount of liquid water in the porous layer. So, for the GDL with a porosity gradient of 14% this decrease is 29.8% and for the GDL with porosity gradient 18.5% this decrease is 38.8% compared to the GDL with uniform porosity.
UR - http://ijhfc.irost.ir/article_905.html
L1 - http://ijhfc.irost.ir/article_905_ef1c183016d8bf965921b72d6d295395.pdf
ER -