Abstract
Thermophoretic force acting on a particle suspended between two parallel walls a distance H apart has been ambiguous in the rarefied gas region where the Knudsen number KnH based on the distance H is in the slip and/or transition regime, i.e., 0.01<KnH<10. Present study simulates the thermophoretic force in such an ambiguous region by using DSMC method based on Boltzmann equation. It is shown that the force decreases with increasing in KnH. A comparison is made between the result of present method and theoretical analysis for continuum and free molecular regime, and good agreement is found in thermophoretic force profiles versus several temperature ratios.
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