Dynamics of filaments and membranes in a viscous fluid

Details Dynamics of filaments and membranes in a viscous fluid Dynamics of filaments and membranes in a viscous fluid

2009-12-08

arxiv.org/abs/0912.1431v1

Rev. Mod. Phys. 82 (2010) 1607

Physics

Condensed Matter

Soft Condensed Matter

26 pages, 12 figures, to be published in Reviews of Modern Physics

Scientific paper

10.1103/RevModPhys.82.1607

Motivated by the motion of biopolymers and membranes in solution, this article presents a formulation of the equations of motion for curves and surfaces in a viscous fluid. We focus on geometrical aspects and simple variational methods for calculating internal stresses and forces, and we derive the full nonlinear equations of motion. In the case of membranes, we pay particular attention to the formulation of the equations of hydrodynamics on a curved, deforming surface. The formalism is illustrated by two simple case studies: (1) the twirling instability of straight elastic rod rotating in a viscous fluid, and (2) the pearling and buckling instabilities of a tubular liposome or polymersome.

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