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The European Physical Journal Special Topics

, Volume 222, Issue 10, pp 2453–2463 | Cite as

How entropy and hydrodynamics cooperate in rectifying particle transport

  • S. MartensEmail author
  • G. Schmid
  • A.V. Straube
  • L. Schimansky-Geier
  • P. Hänggi
Regular Article Nonlinear Dynamics of Stochastic Systems

Abstract

Using the analytical Fick-Jacobs approximation formalism and extensive Brownian dynamics simulations we study particle transport through two-dimensional periodic channels with triangularly shaped walls. Directed motion is caused by the interplay of constant bias acting along the channel axis and a pressure-driven flow. In particular, we analyze the particle mobility and the effective diffusion coefficient. The mechanisms of entropic rectification is revealed in channels with a broken spatial reflection symmetry in presence of hydrodynamically enforced entropic trapping. Due to the combined action of the forcing and the pressure-driven flow field, efficient rectification with a drastically reduced diffusivity is achieved.

Keywords

European Physical Journal Special Topic Asymmetry Parameter Particle Transport Brownian Particle Joint Probability Density Function 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences and Springer 2013

Authors and Affiliations

  • S. Martens
    • 1
    Email author
  • G. Schmid
    • 2
  • A.V. Straube
    • 1
  • L. Schimansky-Geier
    • 1
  • P. Hänggi
    • 2
  1. 1.Department of PhysicsHumboldt-Universität zu BerlinBerlinGermany
  2. 2.Department of PhysicsUniversität Augsburg, Universitätsstr. 1AugsburgGermany

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