Comparing Theory and Simulation for Thermo-osmosis

Abstract

We report a numerical study of thermo-osmotic slip, i.e. the particle flux induced by a thermal gradient along a solid-fluid interface. To facilitate comparison with theory, we consider a model of an ideal but viscous gas. We compare three numerical routes to obtain the slip coefficient: 1. by using the Onsager reciprocity relations 2. by using the appropriate Green-Kubo relation 3. via the excess enthalpy. The numerical results are found to be mutually consistent, and to agree with the theoretical prediction based on the assumption that hydrodynamics and thermodynamics are locally valid.

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Cited by in corpus (6)

• Thermo-osmosis in charged nanochannels: effects of surface charge and ionic strength
• Sampling mobility profiles of confined fluids with equilibrium molecular dynamics simulations
• Thermo-osmotic slip flows around a thermophoretic microparticle characterized by optical trapping of tracers
• Complex coupling between surface charge and thermo-osmotic phenomena
• Coarse Graining Nonisothermal Microswimmer Suspensions
• Fluid flow at interfaces driven by thermal gradients