Numerical analysis of the nonlinear rarefied gas flow caused by temperature gradient in a direction tangential to the wall through a planar channel of finite length is carried out based on the S- model kinetic equation under a range of Knudsen number from free-molecular to slip regime. Cercignani- Lampis solid boundary condition is chosen at channel walls. An implicit scheme is applied; the algorithm is optimized via massive parallelization in both physical and velocity spaces. Results showed that the gas-surface scattering model plays distinguished role for highly rarefied conditions.
The effect of gas-surface model on thermal creep flow
CROCE, Giulio
2014-01-01
Abstract
Numerical analysis of the nonlinear rarefied gas flow caused by temperature gradient in a direction tangential to the wall through a planar channel of finite length is carried out based on the S- model kinetic equation under a range of Knudsen number from free-molecular to slip regime. Cercignani- Lampis solid boundary condition is chosen at channel walls. An implicit scheme is applied; the algorithm is optimized via massive parallelization in both physical and velocity spaces. Results showed that the gas-surface scattering model plays distinguished role for highly rarefied conditions.File in questo prodotto:
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