Berlin 2012 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 10: Nonlinear Dynamics, Synchronisation and Chaos

DY 10.2: Talk

Tuesday, March 27, 2012, 09:45–10:00, MA 001

Effects of rotation on the nonlinear friction of a damped dimer sliding on a periodic substrate — •Italo Neide — Faculty of Physics - University Duisburg-Essen, Duisburg, Germany

The aim of this work is to study the effects of rotation of the non linear friction of a damped dimer sliding on a 1D periodic substrate. Numerical simulations are performed with: a damping in the translational and rotational coordinate, throwing the dimer with a finite initial translational velocity (transient state); with the dimer subjected to an external force applied in the center of mass coordinate and with finite temperatures (steady state). The equations of motion in terms of center of mass and rotational coordinate show a roto-translational coupling, whose is activated for distinct regimes while the dimer is sliding, resulting in an energy transfer between the coordinates. The motivation of this work is to understand the rotational effects that emerges from the dynamics of the smallest object that can rotate, in order to achieve simple contributions to the understanding of the friction origin in nanometric scale.