Regensburg 2016 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 15: Posters - Complex Fluids and Soft Matter

BP 15.1: Poster

Montag, 7. März 2016, 17:30–19:30, Poster C

Margination of rigid spheres in a partially constricted cylinder — •Christian Bächer and Stephan Gekle — Biofluid Simulation and Modeling, University of Bayreuth, Germany

Previous simulations and experiments have shown the ``margination'' of rigid spheres suspended in red blood cells flowing through a microchannel: the rigid spheres are pushed towards the wall, whereas the red blood cells concentrate in the inner region of the channel.

To investigate the influence of more complex geometries we simulate margination in a partially constricted cylinder using the Lattice Boltzmann method. This is done using different cylinder lengths and constriction-cylinder ratios. Besides changes in the radial distribution due to the constriction, the density of spheres in flow direction is investigated.

Understanding the influence of a constriction on margination is necessary for efficient drug delivery, especially, in the case of a stenosis.