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Motion of a tank-treading ellipsoidal particle in a shear flow

  • Stuart R. Keller (a1) (a2) and Richard Skalak (a1)


A theoretical model is developed for the motion of a human red blood cell in a shear field. The model consists of a tank-treading ellipsoidal membrane encapsulating an incompressible Newtonian liquid immersed in a plane shear flow of another incom- pressible Newtonian liquid. Equilibrium and energy considerations lead to a solution for the motion of the particle that depends on the ellipsoidal-axis ratios and the ratio of the inner- to outer-liquid viscosities. The effect of variation in these parameters is explored and it is shown that, depending on their values, one of two types of overall motion is exhibited: a steady stationary-orientation motion or an unsteady flipping motion. A qualitative agreement of the predicted behaviour of the model with experi- mental observations on red blood cells is found.



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Motion of a tank-treading ellipsoidal particle in a shear flow

  • Stuart R. Keller (a1) (a2) and Richard Skalak (a1)


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