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. 2004 Feb;69(2 Pt 1):021503.
doi: 10.1103/PhysRevE.69.021503. Epub 2004 Feb 19.

Mobility of extended bodies in viscous films and membranes

Alex J Levine  1 , T B Liverpool, F C MacKintosh
Affiliations

Mobility of extended bodies in viscous films and membranes

Alex J Levine et al. Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Feb.

Abstract

We develop general methods to calculate the mobilities of extended bodies in (or associated with) membranes and films. We demonstrate a striking difference between in-plane motion of rodlike inclusions and the corresponding case of bulk (three-dimensional) fluids: for rotations and motion perpendicular to the rod axis, we find purely local drag, in which the drag coefficient is purely algebraic in the rod dimensions. These results as well as the calculational methods are applicable to such problems as the diffusion of objects in or associated with Langmuir films and lipid membranes. These methods can also be simply extended to treat viscoelastic systems.

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