Generalization of the Rotne-Prager-Yamakawa mobility and shear disturbance tensors

Abstract

Rotne-Prager-Yamakawa approximation is one of the most commonly used methods of including hydrodynamic interactions in modelling of colloidal suspensions and polymer solutions. The two main merits of this approximation is that it includes all long-range terms (i.e. decaying as R^-3 or slower in interparticle distances) and that the diffusion matrix is positive definite, which is essential for Brownian dynamics modelling. Here, we extend the Rotne-Prager-Yamakawa approach to include both translational and rotational degrees of freedom, and derive the regularizing corrections to account for overlapping particles. Additionally, we show how the Rotne-Prager-Yamakawa approximation can be generalized for other geometries and boundary conditions.

to be published in J. Fluid. Mech

References in corpus (2)

• Fluid transport at low Reynolds number with magnetically actuated artificial cilia
• Hydrodynamic interactions of spherical particles in suspensions confined between two planar walls

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