How entropy and hydrodynamics cooperate in rectifying particle transport

摘要: 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 interplay of constant bias acting along channel axis a pressure-driven flow. In particular, analyze mobility effective diffusion coefficient. The mechanisms entropic rectification revealed in broken spatial reflection symmetry presence hydrodynamically enforced trapping. Due to combined action forcing flow field, efficient drastically reduced diffusivity achieved.