Fig. 3From: Highly rarefied gas flows in rough channels of finite lengthStreamlines and magnitude of velocity in lower half of the unit channel having a size of \(H\times H\), when accommodation coefficient \(\alpha =0.01\) and \(w=0.05H\). The bump heights are \(h=0.1H\), 0.2H, 0.3H, and 0.4H, respectivelyBack to article page