Dresden 2009 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 36: Microfluidics III: Soft Objects in Flow

CPP 36.4: Talk

Thursday, March 26, 2009, 16:45–17:00, ZEU 160

Development and validation of a simplified particulate model for the simulation of blood flow in arbitrary geometries — •Florian Janoschek and Jens Harting — Institute for Computational Physics, Pfaffenwaldring 27, D-70569 Stuttgart, Germany

Simulation of human blood flow is a demanding task both in terms of the complexity of applicable models as well as the computational effort. One reason is the particulate nature of blood which in first approximation may be treated as a suspension of red blood cells (RBC) in blood plasma. A second reason is that in realistic geometries typical length scales vary over several orders of magnitude.

By coupling a simple molecular dynamics algorithm for modeling the RBC to the lattice Boltzmann method we obtain an efficient and versatile parallel code that keeps the particulate nature of the RBC and takes full hydrodynamic interactions into account. Different from other lattice Boltzmann-based approaches we do not model the deformability of the RBC itself but instead cover it by soft anisotropic potentials between each two particles as well as between each particle and the confining geometry.

Due to this simplifications our model is computationally efficient enough to simulate the high numbers of RBC that occur in vessels of intermediate size. To validate our model we compare our numerical results to experimental data obtained from the literature.