The effects of adsorbed gas layers on gas-surface interaction is investigated by a kinetic model based on the Enskog-Vlasov equation. The onset of collisional effects in the gas layer is studied by equilibrium simulations. The effects of adsorption on the gas-wall friction forces is investigated in a simple Couette flow geometry. It is shown that gas adsorption might reduce tangential stresses, as indicated by molecular dynamics based studies. Finally an example is produced in which the two-dimensional Enskog-Vlasov equation is solved to simulate the formation of a liquid film on the walls of a planar channel.
A kinetic model for collisional effects in dense adsorbed gas layers
BARBANTE, PAOLO FRANCESCO;FREZZOTTI, ALDO;GIBELLI, LIVIO;
2010-01-01
Abstract
The effects of adsorbed gas layers on gas-surface interaction is investigated by a kinetic model based on the Enskog-Vlasov equation. The onset of collisional effects in the gas layer is studied by equilibrium simulations. The effects of adsorption on the gas-wall friction forces is investigated in a simple Couette flow geometry. It is shown that gas adsorption might reduce tangential stresses, as indicated by molecular dynamics based studies. Finally an example is produced in which the two-dimensional Enskog-Vlasov equation is solved to simulate the formation of a liquid film on the walls of a planar channel.File in questo prodotto:
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