Rotational behavior of red blood cells in suspension---a mesoscale simulation study

Details Rotational behavior of red blood cells in suspension---a mesoscale simulation study Rotational behavior of red blood cells in suspension---a mesoscale simulation study

2010-10-29

arxiv.org/abs/1010.6196v1

Phil. Trans. R. Soc. London Series A 369, Number 1944, 2337-2344 (2011)

Physics

Condensed Matter

Soft Condensed Matter

8 pages, 5 figures

Scientific paper

10.1098/rsta.2011.0086

The nature of blood as a suspension of red blood cells makes computational hemodynamics a demanding task. Our coarse-grained blood model, which builds on a lattice Boltzmann method for soft particle suspensions, enables the study of the collective behavior of the order of 10^6 cells in suspension. After demonstrating the viscosity measurement in Kolmogorov flow, we focus on the statistical analysis of the cell orientation and rotation in Couette flow. We quantify the average inclination with respect to the flow and the nematic order as a function of shear rate and hematocrit. We further record the distribution of rotation periods around the vorticity direction and find a pronounced peak in the vicinity of the theoretical value for free model cells even though cell-cell interactions manifest themselves in a substantial width of the distribution.

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