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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 12: Focus: Soft Particles in Flows II (joint focus session CPP/DY)

CPP 12.3: Vortrag

Montag, 20. März 2017, 15:45–16:00, ZEU 160

Red blood cells in high shear and strain rates: how numerical simulation can contribute — •Simon Mendez, Etienne Gibaud, and Franck Nicoud — IMAG, UMR CNRS 5149, University of Montpellier. 34095 Montpellier. France

Red blood cells (RBCs) constitute 99 percent of the formed elements present in blood. The dynamics of RBCs controls the complexity and the behavior of blood itself, as red blood cells constitute approximately 40 percent of the whole blood volume. The individual dynamics of a RBC is still a topic of research. This is particularly the case at high shear and strain rates, for which experimental data are scarce, due to the difficulty of visualizing the RBC dynamics in high-speed flows.

Although computing the RBCs dynamics in flows with high shear/strain rates is challenging, numerical simulation does not suffer from the same limitations as in vitro experiments of high-speed flows. This talk will illustrate how computations can be used in this context to gain new insight in the dynamics of red blood cells.

Two examples will be used: the behavior of RBCs at high shear rate in a low-viscosity fluid and the dynamics of RBCs during their counting and sizing in industrial blood analyzers, where strain dominates.