Slippery-Sticky Transition of Interfacial Fluid Slip
arXiv:2104.09572 · doi:10.1063/5.0054631
Abstract
The influence of temperature on interfacial fluid slip, as measured by molecular-dynamics simulations of a Couette flow comprising a Lennard-Jones fluid and rigid crystalline walls, is examined as a function of the fluid-solid interaction strength. Two different types of thermal behavior are observed, namely, the slippery and sticky cases. The first is characterized by a steep and unlimited increase of the slip length at low temperatures, while the second presents a vanishing slip length in this regime. As the temperature increases in relation to a characteristic value, both cases converge to finite slip lengths. A recently proposed analytical model is found to well describe both thermal behaviors, also predicting the slippery-sticky transition that occurs at a critical value of the fluid-solid interaction parameter, for which, according to the model, fluid particles experience a smooth average energy landscape at the interface.
arXiv comment10 pages, 4 figures
References in corpus (12)
- Low Friction Flows of Liquids at Nanopatterned Interfaces
- Boundary conditions at a fluid - solid interface
- Slip behavior in liquid films on surfaces of patterned wettability: Comparison between continuum and molecular dynamics simulations
- Influence of wetting properties on the hydrodynamic boundary condition at a fluid-solid interface
- Dynamics of simple liquids at heterogeneous surfaces : Molecular Dynamics simulations and hydrodynamic description
- Slip at Fluid-Solid Interface
- Rate-dependent slip boundary conditions for simple fluids
- Effect of surface roughness on rate-dependent slip in simple fluids
- Modeling the combined effect of surface roughness and shear rate on slip flow of simple fluids
- Temperature dependence of the slip length in polymer melts at attractive surfaces
- A Universal Molecular-Kinetic Scaling Relation for Slip of a Simple Fluid at a Solid Boundary
- Multiscale Approach to Fluid-Solid Interfaces: An overview of methodologies coupling fluid mechanics to molecular dynamics and quantum theory