Abstract: The two-phase flow in an anode channel was simulated by commercial software Fluent to study the effects of hydrophilic/hydrophobic properties on liquid distribution and gas behavior. The results showed that carbon-dioxide gas moved quickly on the hydrophobic surface. But hydrophobic channel side-wall had little benefits on the reactants transportiing to the gas diffusion layer (GDL). The reactants transportiing to GDL could be improved in an anode channel with hydrophilic channel side-wall and hydrophilic GDL surface，but it took more time for the gas to move out of the anode channel. An anode channel with hydrophilic channel side-wall and hydrophobic GDL surface avoided gas accumulation on the GDL surface，and facilitated the gas discharging and liquid transporting to GDL.

摘要： 采用计算流体力学软件FLUENT对DMFC阳极通道内的气液两相流进行数值模拟，考察了阳极通道壁面的亲水性质对通道内气液两相流的影响。模拟结果表明：当流道侧壁面为憎水性时，CO₂气体排出速度较快，但不利于反应物向扩散层方向迁移；当流道侧壁面和扩散层（GDL）表面均为亲水性时，有利于反应物向GDL方向迁移，但CO₂气体排出阳极通道的速度较慢；当流道侧壁面为亲水性、GDL表面为憎水性时，既有利于反应物向GDL方向迁移，又有利于CO₂气体排出通道。