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- DescriptionThe rheology of dense red blood cell suspensions is investigated via computer simulations based on the lattice Boltzmann, the immersed boundary, and the finite element methods. The red blood cells are treated as extended and deformable particles immersed in the ambient fluid. In the first part of the work, the numerical model and strategies for stress evaluation are discussed. In the second part, the behavior of the suspensions in simple shear flow is studied for different volume fractions, particle deformabilities, and shear rates. Shear thinning behavior is recovered. The existence of a shear-induced transition from a tumbling to a tank-treading motion is demonstrated. The transition can be parameterized by a single quantity, namely the effective capillary number. It is the ratio of the suspension stress and the characteristic particle membrane stress. At the transition point, a strong increase in the orientational order of the red blood cells and a significant decrease of the particle diffusivity are observed. However, the average cell deformation shows signature of the transition.
- Author BiographyTimm Kruger is physicist with focus on computational modeling of complex fluids at the Department of Applied Physics, Eindhoven University of Technology.
- PublisherSpringer Fachmedien Wiesbaden
- Date of Publication13/07/2012
- SubjectLife Sciences: General
- Place of PublicationWeisbaden
- Country of PublicationGermany
- ImprintVieweg+Teubner Verlag
- Content Note7 black & white tables
- Weight312 g
- Width168 mm
- Height240 mm
- Spine10 mm
- Edited byHeinrich Kruger,Timm Kruger
- Edition Statement2012
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