Figure 6
From: Viscous flow between two sinusoidally deforming curved concentric tubes: advances in endoscopy

(a) Streamline plot for \(s = 0.01\). (b) Streamline plot for \(s = 0.02\). (c) Streamline plot for \(s = 0.03\). (d) Streamline plot for \(s = 0.04\).