Author(s)

C. Queguiner & D. Barthes-Biesel

Abstract

The boundary element method is used to model the creeping flow of deformable capsules through cylindrical pores. The entrance and steady state values for the additional pressure drop, as well as the deformed shape of the capsule can thus be predicted. The respective roles of capsule size and of membrane deformability can thus be investigated. 1 Introduction Capsules are composite particles consisting of a liquid internal medium, surrounded by a very thin deformable membrane. This definition covers a large number of particles from liquid droplets, to biological cells (red blood cells for example) and artificial capsules. The prediction of the motion and deformation of a capsule in shear flow is a difficult problem of continuum mechanics where fluid mechanics (internal and external liquid motion) and solid mechanics (membrane de

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