Thermal forces from a microscopic perspective
arXiv:1901.09840 · doi:10.1103/PhysRevLett.123.028002
Abstract
Thermal gradients lead to macroscopic fluid motion if a confining surface is present along the gradient. This fundamental nonequilibrium effect, known as thermo-osmosis, is held responsible for particle thermophoresis in colloidal suspensions. A unified approach for thermo-osmosis in liquids and in gases is still lacking. Linear Response Theory is generalised to inhomogeneous systems,leading to an exact microscopic theory for the thermo-osmotic flow showing that the effect originates from two independent physical mechanisms, playing different roles in the gas and liquid phases, reducing to known expressions in the appropriate limits.
Five pages Letter plus Supplementary Material
References in corpus (7)
- Designing phoretic micro- and nano-swimmers
- Modeling friction: From nanoscale to mesoscale
- Thermo-osmotic flow in thin films
- What controls thermo-osmosis? Molecular simulations show the critical role of interfacial hydrodynamics
- Molecular Simulation of Thermo-osmotic slip
- Gauge invariance of thermal transport coefficients
- Hamiltonian transformation to compute Thermo-osmotic Forces
Cited by in corpus (8)
- Thermo-osmotic slip flows around a thermophoretic microparticle characterized by optical trapping of tracers
- Complex coupling between surface charge and thermo-osmotic phenomena
- Comparing Theory and Simulation for Thermo-osmosis
- A simple statistical-mechanical interpretation of Onsager reciprocal relations and Derjaguin theory of thermo-osmosis
- Slip-flow theory for thermo-osmosis based on a kinetic model with near-wall potential
- Semi-analytical model of optothermal fluidics in a confinement
- Fluid flow at interfaces driven by thermal gradients
- Mechanical analysis of a dynamical phase transition for particles in a channel