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Physics Colloquium: "Cellular Blood Flow in Small Vessels"

SpeakerJonathan Freund, Kritzer Faculty Scholar in Mechanical Science and Engineering at the University of Illinois Urbana Champaign and Co-Director of the Center for Exascale Simulation of Plasma-Coupled Combustion
Date Feb 25, 2015
Time 4:00 pm  
Location 141 Loomis
Cost None
Sponsor Physics Department
Contact Stephanie Johansson
Phone 217-300-4241
Event type Seminar/Symposium
Views 9
Originating Calendar Physics - Colloquium

The cellular character of blood leads to complex flow phenomenology in vessels that are of comparable size to that of blood cells. We have designed and implemented an advanced algorithm that simultaneously solves for the dynamics of the highly deformable blood cells and their flow in such confined geometries. It is a boundary integral solver, with fast methods for evaluating the hydrodynamic interactions and spherical harmonics for representing cell shapes. The merits of this approach will be discussed from the perspective of the resolution of the discretization. The talk will include studies of three model configurations. (1) The transport of magnetic nanometer-scale particles in small vessels, which can be used for target drug or hyperthermia treatment. Stirring through interaction with the red blood cells lead these to marginate to vessel walls, but this is non-trivially coupled with applied magnetic forces. (2) A study of the flow of red-blood cell through a model spleenic slit, which seems to represent the smallest  blood passages in the body. An instability-like bifurcation is identified that is potentially important physiologically and for engineered microdevices that process blood. Finally, (3) the forces due to red blood cells on vessels wall will be investigated as a potential mechanotrigger for vascular development.

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