Convergence of Nonequilibrium Langevin Dynamics for Planar Flows

08/30/2022

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by   Matthew Dobson, et al.

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We prove that incompressible two dimensional nonequilibrium Langevin dynamics (NELD) converges exponentially fast to a steady-state limit cycle. We use automorphism remapping periodic boundary conditions (PBCs) techniques such as Lees-Edwards PBCs and Kraynik-Reinelt PBCs to treat respectively shear flow and planar elongational flow. After rewriting NELD in Lagrangian coordinates, the convergence is shown using a technique similar to [ R. Joubaud, G. A. Pavliotis, and G. Stoltz,2014