When the Knudsen number is between 10~ (-3) and 10~ (-1), the gas rarefaction effect causes relative slip of flow and jump of temperature to the tube wall. 当Knudsen数处于10-3和1-01之间时,稀薄效应造成气体与管壁面间的相对滑移和温度跳跃。
In the porous electrodes, Gas convective flow is governed by Darcy's law and ordinary diffusions as well as Knudsen effect are considered to cater for different porous electrode designs. 在多孔电极中的气体流动符合达西定律的前提下,为满足不同的多孔电极设计,综合考虑了摩尔扩散和Knudsen扩散。