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Surprisingly high probability of evaporation for a molecule passing through the Knudsen layer
Date
Abstract
The most important characteristics of the Knudsen layer are the temperature jump ^T between the liquid and vapor and the probability θK that a molecule, emitted by the liquid into the vapor, reaches infinity (as opposed to bouncing back due to collisions). In the present paper, the linearized Bhatnagar-Gross-Krook model is used to calculate ^T and θK and show that, in the absence of macroscopic gradients of temperature and density, θK ≈ 96.3%. It is then examined how ^T and θK are affected by a combination of a temperature gradient (heat flux) and the matching density gradient, such that the resulting pressure field is uniform
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Description
Publisher
American Physical Society
Citation
Physical Review E. 111, 044116