Numerical Simulation of Condensed Water Behavior in Gas Diffusion Layers of PEFC Using the Lattice Boltzmann Method

2013 ◽  
Author(s):  
Yutaka Tabe ◽  
Ryuji Kamijo ◽  
Yuji Honjo ◽  
Kengo Suzuki ◽  
Takemi Chikahisa
Keyword(s):  
Lattice Boltzmann Method ◽  
Liquid Water ◽  
Lattice Boltzmann ◽  
Large Scale ◽  
Gas Flow ◽  
Gas Diffusion ◽  
Two Phase ◽  
Water Behavior ◽  
Condensed Water ◽  
Boltzmann Method

Numerical simulations using the lattice Boltzmann method (LBM) has been developed to elucidate the dynamic behavior of condensed water in a gas diffusion layer (GDL) of a polymer electrolyte membrane fuel cell (PEFC). Here, a LBM model of two-phase flow with equal densities was applied, because the condensed water behavior is less affected by the gas flow. The simulation results showed that the LBM applied here can simulate dynamic capillary fingering at low migration speeds of liquid water in a GDL, which is similar to the results of the LBM simulation with large density differences. Using the equal density LBM, we conducted efficient large-scale analyses to elucidate the effect of the GDL structure and wettability on the liquid water behavior inside of the GDL.

Numerical Simulations of Droplets on Porous Structures by Use of Lattice Boltzmann Method

2011 ◽  
Author(s):  
Yosuke Matsukuma ◽  
Gen Inoue ◽  
Masake Minemoto
Keyword(s):  
Numerical Simulations ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Gas Diffusion ◽  
Polymer Electrolyte Fuel Cell ◽  
Two Phase ◽  
Gas Channel ◽  
Density Ratios ◽  
Boltzmann Method ◽  
2D And 3D

This paper demonstrates numerical simulations of droplet on gas diffusion layer of the polymer electrolyte fuel cell. The lattice Boltzmann method for incompressible two-phase flows at high density ratios were applied for the simulations in order to precisely predict the shape and moving velocity of water droplet surrounding by the air in the gas channel. Simulations were conducted in 2D and 3D and height and moving velocity of droplet were compared with experiment as a function of mean gas velocity in the gas channel. The droplet heights by the simulations were qualitatively agreed with the experimental data, while the simulation results of moving speed of droplet somewhat overestimated the experimental results.

Numerical Simulation of Liquid Water Behavior in Separator-Channels in PEMFC Using LBM

2005 ◽  
Author(s):  
Yutaka Tabe ◽  
Takamichi Ochi ◽  
Kazushige Kikuta ◽  
Takemi Chikahisa ◽  
Hideki Shinohara
Keyword(s):  
Diffusion Layer ◽  
Liquid Water ◽  
Polymer Electrolyte Membrane ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Two Phase ◽  
Cross Sectional ◽  
Electrolyte Membrane ◽  
Water Behavior ◽  
Condensed Water

In a polymer electrolyte membrane fuel cell, the condensed water in the separator-channel prevents the supply of reactants to electrodes, which deteriorates the cell performance. The Lattice Boltzmann simulation has been conducted to understand the behavior of condensed water in the separator-channels. The scheme for the two-phase flow with large density difference was applied and the boundary condition for wettability at the corner inside the channel was examined. The present simulation demonstrates the effects of the cross-sectional shape, the wettability of channel and the volume of condensed water on the liquid water behavior. In the hydrophilic separator-channels, the liquid water spreads along the channel wall to form film and, in a specific condition, the water draws away from the gas diffusion layer, which suppresses the flooding. On the other hand, the liquid water forms sphere, covering larger area of the surface of gas diffusion layer in the hydrophobic separator-channels, but the drain performance of liquid water is superior.

Numerical Predicting of Liquid Water Transport inside Gas Diffusion Layer for PEMFC Using Lattice Boltzmann Method

2017 ◽  
Vol 80 (8) ◽  
pp. 187-195 ◽  
Author(s):  
Pongsarun Satjaritanun ◽  
Sirivatch Shimpalee ◽  
John W. Weidner ◽  
Shinichi Hirano ◽  
Zijie Lu ◽  
...  
Keyword(s):  
Lattice Boltzmann Method ◽  
Water Transport ◽  
Diffusion Layer ◽  
Liquid Water ◽  
Lattice Boltzmann ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Boltzmann Method ◽  
Liquid Water Transport
Sign in / Sign up

Export Citation Format

Share Document