Single particle Brownian motion with solid friction

Regular Article

DOI: 10.1140/epje/i2017-11549-9

Cite this article as:
Das, P., Puri, S. & Schwartz, M. Eur. Phys. J. E (2017) 40: 60. doi:10.1140/epje/i2017-11549-9
  • 28 Downloads

Abstract.

We study the Brownian dynamics of a solid particle on a vibrating solid surface. Phenomenologically, the interaction between the two solid surfaces is modeled by solid friction, and the Gaussian white noise models the vibration of the solid surface. The solid friction force is proportional to the sign of relative velocity. We derive the Fokker-Planck (FP) equation for the time-dependent probability distribution to find the particle at a given location. We calculate analytically the steady state velocity distribution function, mean-square velocity and diffusion coefficient in d-dimensions. We present a generic method of calculating the autocorrelations in d-dimensions. This results in one dimension in an exact evaluation of the steady state velocity autocorrelation. In higher dimensions our exact general expression enables the analytic evaluation of the autocorrelation to any required approximation. We present approximate analytic expressions in two and three dimensions. Next, we numerically calculate the mean-square velocity and steady state velocity autocorrelation function up to d = 3 . Our numerical results are in good agreement with the analytically obtained results.

Graphical abstract

Keywords

Flowing Matter: Granular Matter 

Copyright information

© EDP Sciences, SIF, Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.School of Physical SciencesJawaharlal Nehru UniversityNew DelhiIndia
  2. 2.Beverly and Raymond Sackler School of Physics and AstronomyTel Aviv UniversityRamat AvivIsrael
  3. 3.Faculty of EngineeringHolon Institute of TechnologyHolonIsrael

Personalised recommendations