Numerical simulation of thermal transpiration phenomenon by Monte-Carlo method with different scattering kernels on solid surface

The results of numerical simulation of the thermal transpiration phenomenon at free molecular conditions of gas flow in channels with the Maxwell, the Cercignani–Lampis and the Epstein scattering kernel application are presented. The influence of the scattering kernel parameters and of the main physical characteristics of the simulated system on the thermal transpiration coefficient was studied. The comparison with the experimental data was also made. The principal outcome of the study is the statement that in contrast to the Maxwell kernel the application of the Cercignani–Lampis and the Epstein scattering kernels permits to describe more correctly the non-isothermal internal rarefied gas flow.