Shahrood University of Technology Journal of Solid and Fluid Mechanics 2251-9475 5 2 2015 06 22 Investigation of Internal Flow of Binary Gas in a Rotating Cylinder Using Direct Simulation Monte-Carlo (DSMC) Investigation of Internal Flow of Binary Gas in a Rotating Cylinder Using Direct Simulation Monte-Carlo (DSMC) 261 270 414 10.22044/jsfm.2015.414 FA J. Khadem A. Abotalebi S. Nourazar Assoc. Prof., Mech. Eng., Amirkabir University of Technology, Tehran, Iran Journal Article 2013 04 06 In this paper a rarefied binary gas mixture flow of Argon and Helium inside a rotating cylinder with constant angular velocity and constant wall temperature is investigated using the direct simulation of Monte - Carlo (DSMC) method. The number of different molecules were used, to study the dependence of the solution to number molecule model. The results show that increasing the number of molecules model is more accurate, but On the other hand increase the simulation time. Also for modeling the intermolecular collision, the variable soft sphere (VSS) and the variable hard sphere (VHS) were investigated in present work and the results were compared with each other. The results show that the variable soft sphere model (VSS) compared to the variable hard sphere model (VHS) for the temperature of the mixture near the cylinder walls more carefully. The analytical solution is also presented and compared with the current simulation results. In this paper a rarefied binary gas mixture flow of Argon and Helium inside a rotating cylinder with constant angular velocity and constant wall temperature is investigated using the direct simulation of Monte - Carlo (DSMC) method. The number of different molecules were used, to study the dependence of the solution to number molecule model. The results show that increasing the number of molecules model is more accurate, but On the other hand increase the simulation time. Also for modeling the intermolecular collision, the variable soft sphere (VSS) and the variable hard sphere (VHS) were investigated in present work and the results were compared with each other. The results show that the variable soft sphere model (VSS) compared to the variable hard sphere model (VHS) for the temperature of the mixture near the cylinder walls more carefully. The analytical solution is also presented and compared with the current simulation results. https://jsfm.shahroodut.ac.ir/article_414_aa842bec718619fd9bbb83243f1f1669.pdf