Modeling and simulation of the gas behavior in a gas centrifuge rotor in the presence of hydrogen fluoride light gas by DSMC and Onsager-pancake

The gas behavior within a centrifuge machine can be divided into molecular and continuum. The Boltzmann equation is an accurate method for studying the behavior of gas in all areas of a centrifuge. DSMC is one of the methods for solving the Boltzmann equation. In the literature published so far, a presumptive source has been considered the mass source used in the Onsager-Pancake equation in the continuum region. The researchers have presented various presumptive mass sources. In the present work, the feed reaching form to continuum region and its effect on the border between the two areas in the mass source form was calculated using the direct Monte Carlo method. The results were compared with Gunzburger's presumptive mass source. Moreover, the mass source obtained from the presence of hydrogen fluoride light gas in the feed was calculated at the border of two regions as a two-component mixture (ZUF6=0.97, ZHF=0.03), (ZUF6=0.93, ZHF=0.07) and (ZUF6=0.9, ZHF=0.1). The concentration distribution along the rotor was calculated by inserting the obtained flow function into the Onsager-Cohen diffusion equations. Finally, the separation parameters and the separation power were calculated. The results show that the separation factor and the separation power decrease by increasing the light gas amount in the feed entering the machine.