A theory for thermal transpiration based on the dusty-gas model has been proposed by Mason, Evans, and Watson. For verification the theory ideally requires both nonisothermal and isothermal measurements on a sample of porous material. Such measurements are reported and it is found that the dusty-gas theory satisfactorily reproduces the experimental results except when the gas adsorbed appreciably on the sample.
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H. J. M. Hanley (1965) studied this question.
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