Anomalous distribution functions in sheared suspensions

Details Anomalous distribution functions in sheared suspensions Anomalous distribution functions in sheared suspensions

2007-07-30

arxiv.org/abs/0707.4356v3

EPL 83, 30001 (2008)

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 4 figures, to appear in Europhysics Letters

Scientific paper

10.1209/0295-5075/83/30001

We investigate velocity probability distribution functions (PDF) of sheared hard-sphere suspensions. As observed in our Stokes flow simulations and explained by our single-particle theory, these PDFs can show pronounced deviations from a Maxwell-Boltzmann distribution. The PDFs are symmetric around zero velocity and show a Gaussian core and exponential tails over more than six orders of magnitude of probability. Following the excellent agreement of our theory and simulation data, we demonstrate that the distribution functions scale with the shear rate, the particle volume concentration, as well as the fluid viscosity.

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