Europhys. Lett.
Volume 75, Number 4, August 2006
Page(s) 645 - 651
Section Interdisciplinary physics and related areas of science and technology
Published online 19 July 2006
Europhys. Lett., 75 (4), pp. 645-651 (2006)
DOI: 10.1209/epl/i2006-10155-0

Non-equilibrium hydrodynamics of a rotating filament

H. Wada and R. R. Netz

Physics Department, Technical University Munich - 85748 Garching, Germany

received 5 May 2006; accepted in final form 29 June 2006
published online 19 July 2006

The nonlinear dynamics of an elastic filament that is forced to rotate at its base is studied by hydrodynamic simulation techniques; coupling between stretch, bend, twist elasticity and thermal fluctuations is included. The twirling-overwhirling transition is located and found to be strongly discontinuous. For finite bend and twist persistence length, thermal fluctuations lower the threshold rotational frequency, for infinite persistence length the threshold agrees with previous analytical predictions.

87.15.-v - Biomolecules: structure and physical properties.
47.20.Ky - Nonlinearity, bifurcation, and symmetry breaking. - Low-Reynolds-number motion.

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