Berlin 2012 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 38: Focus: Rheology II (joint focus with DRG)

CPP 38.3: Talk

Friday, March 30, 2012, 10:15–10:30, C 130

Competition of inertia and deformability - lateral motion of deformable particles in duct flow — •Timm Krüger, Badr Kaoui, and Jens Harting — Eindhoven University of Technology, Eindhoven, The Netherlands

The lateral motion of deformable particles in a planar Poiseuille flow has not been entirely understood. On the one hand, it is known that the deformability of particles (expressed by the capillary number, Ca, the ratio of viscous fluid and elastic particle stresses) promotes a migration towards the centerplane of the flow in the absence of inertia (zero Reynolds number, Re = 0). On the other hand, inertia effects are responsible for an outward migration of rigid particles (Ca = 0) close to the centerplane. We present 3D simulation results for systems with both finite Ca and Re and discuss the interplay of inertia and deformability effects.