Dresden 2017 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 25: Posters - Soft Particles, Microswimmers, Microfluidics
DY 25.1: Poster
Tuesday, March 21, 2017, 18:15–21:00, P3
2D simulation of Red Blood Cells in Capillaries. — •Zakaria Boujja1, Chaouqi Misbah2, and Christian Wagner1 — 1Saarland University, Experimental Physics, Saarbrücken, Germany — 2Grenoble Alpes University, LIPHY, Grenoble, France
Blood at physiologic conditions is a dense suspension of cells, dominated in terms of its dynamics by red blood cells, they make up over approximately 40% of the blood volume, they are the blood component principally responsible for its rheology.
RBCs are made of a two dimensional fluid bilayer of phospholipids, having underneath a network of proteins conferring to them shear elasticity.
Simplified systems, like vesicles (made of a pure bilayer of phospholipid) and capsules (made of an extensible polymer shell) are used as models for RBCs, both systems reproduce several features known for RBCs under flow, the general problem is to understand the movement of cells under different flows and geometries.
The model used in our 2D simulation is the Giant Unilamellar Vesicle (GUV) model, the membrane curvature force will be calculated with the Helfrich elasticity theory.
The numerical resolution will give us the vesicle shape as function of two carasteristic numbers the Capillary number (Ck) and the Confinement (Cn).
A large number of studies were devoted to finding the equilibrium shapes of a RBCs in Poiseuille flow. We focused our study in a particularly interesting shape which has a motion like flagella, and called "Snaking Shape".