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Computer simulation study of collect...

Kruger, Timm.

Computer simulation study of collective phenomena in dense suspensions of red blood cells under shear

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Computer simulation study of collective phenomena in dense suspensions of red blood cells under shearby Timm Kruger.
作者:	Kruger, Timm.
出版者:	Wiesbaden :Vieweg+Teubner Verlag :2012.
面頁冊數:	xiii, 165 p. :ill., digital ;24 cm.
Contained By:	Springer eBooks
標題:	BloodRheology
電子資源:	http://dx.doi.org/10.1007/978-3-8348-2376-2
ISBN:	9783834823762 (electronic bk.)

Computer simulation study of collective phenomena in dense suspensions of red blood cells under shear
Kruger, Timm.

Computer simulation study of collective phenomena in dense suspensions of red blood cells under shear[electronic resource] /by Timm Kruger. - Wiesbaden :Vieweg+Teubner Verlag :2012. - xiii, 165 p. :ill., digital ;24 cm.

Complex fluids and their rheology -- Physics of red blood cells and hemorheology -- Numerical model for simulations of red blood cell suspensions -- Physical considerations and ingredients for the numerical model -- Fluid solver: the lattice Boltzmann method -- Fluid-structure interaction: the immersed boundary method -- Membrane model and energetics -- Stress evaluation in combined immersed boundary lattice Boltzmann simulations -- Rheology and microscopic behavior of red blood cell suspensions.

The 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 no signature of the transition.

ISBN: 9783834823762 (electronic bk.)Subjects--Topical Terms:

585271
Blood
--Rheology

LC Class. No.: QP105.15 / .K78 2012

Dewey Class. No.: 612.1181

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520 $a The 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 no signature of the transition.
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