Berlin 2015 – scientific programme

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BP: Fachverband Biologische Physik

BP 24: Posters: Membranes and vesicles

BP 24.3: Poster

Tuesday, March 17, 2015, 14:00–16:00, Poster A

Analysis of rheological properties of dense capsule suspensions using boundary element method — Daiki Matsunaga, •Yohsuke Imai, Takami Yamaguchi, and Takuji Ishikawa — 6-6-01, Aramaki Aza Aoba, Aoba ku, Sendai, Japan

A capsule is a liquid drop enclosed by thin, deformable membrane. Biological cells and membrane-bounded drugs can be thought of as capsules. Since it is important to understand the rheology of capsule suspensions such as blood, a number of studies have been conducted to clarify the viscosity of capsule suspensions. However, it is still unknown that how the capsule will change its contribution of viscosity increase, when changing the volume fraction of capsules. We present a numerical analysis of a dense capsule suspension with volume fraction varying from 0 to 30%. In order to speed up the computation of boundary element method, we utilized GPU computing for the simulation. The results show that volume fraction increase leads to an increase in the deformation of the capsule, while reducing the orientation angle with respect to the velocity direction. We also report how these changes in capsule deformations would affect the bulk rheology of the suspension.