Fig. 2From: Highly rarefied gas flows in rough channels of finite lengthThe dimensionless mass flow rate as a function of the Knudsen number, with different values of accommodation coefficient. The size of the unit channel is \(H\times H\). In the rough channel, each bump has a size of \(h\times {w}=0.1H\times 0.2H\), and the offset distance is \(\delta =0\)Back to article page