Parts | Days | Selection | Search | Updates | Downloads | Help

VA: Fachverband Vakuumphysik und Vakuumtechnik

VA 2: Gas Flow Simulation

VA 2.2: Talk

Monday, March 14, 2011, 11:20–11:40, HSZ 101

Follow-up vacuum study of the ITER model cryopump by the Direct Simulation Monte Carlo method — •Stylianos Varoutis¹, Felix Sharipov², Christian Day¹, Xueli Luo¹, and Horst Haas¹ — ¹Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITeP), KIT Campus Nord, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany — ²Departamento de Física, Universidade Federal do Paraná, Caixa Postal 19044, Curitiba 81531-990, Brazil

The aim of the present work is a numerical modeling of the ITER model cryopump combining both DSMC and TPMC methods. The complicated flow configuration of cryopanels is modelled using the TPMC method since the intermolecular collisions can be neglected, while the remaining part of the cryopump is modelled with the DSMC method using as input the data obtained by the former approach. A detailed comparison with the corresponding experimental data is performed, which demonstrates the reliability of the computational tool. The numerical results provide detailed information about the gas flow field such as pressure distribution, number of particles and energy flux absorbed by each cryopanel, etc. These quantities can be used to optimize the pumping system in order to improve its performance.