Bistability and noise-enhanced velocity of rolling motionT. Pöschel1, N. V. Brilliantov2 and A. Zaikin1, 3
1 Institut für Biochemie, Charité - Monbijoustraße 2, D-10117 Berlin, Germany
2 Institute of Physics, University Potsdam Am Neuen Palais 10, 14469 Potsdam, Germany
3 Department of Mathematical Sciences, University of Exeter - EX4 4QE Exeter, UK
received 5 August 2004; accepted in final form 17 November 2004
published online 5 January 2005
We investigate the motion of a hard cylinder rolling down a soft inclined plane. The cylinder is subjected to a viscous drag force and stochastic fluctuations due to the surrounding medium. In a wide range of parameters we observe bistability of the rolling velocity. In dependence on the parameters, increasing noise level may lead to increasing or decreasing average velocity of the cylinder. The approximative analytical theory agrees with numerical results.
46.55.+d - Tribology and mechanical contacts.
62.40.+i - Anelasticity, internal friction, stress relaxation, and mechanical resonances.
81.40.Pq - Friction, lubrication, and wear.
© EDP Sciences 2005