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Issue 19, 2019
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Anomalous transport in the soft-sphere Lorentz model

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Abstract

The sensitivity of anomalous transport in crowded media to the form of the inter-particle interactions is investigated through computer simulations. We extend the highly simplified Lorentz model towards realistic natural systems by modeling the interactions between the tracer and the obstacles with a smooth potential. We find that the anomalous transport at the critical point happens to be governed by the same universal exponent as for hard exclusion interactions, although the mechanism of how narrow channels are probed is rather different. The scaling behavior of simulations close to the critical point confirm this exponent. Our result indicates that the simple Lorentz model may be applicable to describing the fundamental properties of long-range transport in real crowded environments.

Graphical abstract: Anomalous transport in the soft-sphere Lorentz model

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Article information


Submitted
01 Mar 2019
Accepted
09 Apr 2019
First published
10 Apr 2019

Soft Matter, 2019,15, 3906-3913
Article type
Paper

Anomalous transport in the soft-sphere Lorentz model

C. F. Petersen and T. Franosch, Soft Matter, 2019, 15, 3906 DOI: 10.1039/C9SM00442D

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