INTERACTION OF AN EXPANDING GAS CLOUD WITH A PERFORATED SCREEN

The expansion of a high-pressure gas cloud in a vacuum chamber in the presence of 3 low-pressure background gas is considered. The interacti on of the expanding cloud with the background gas and with a perforate d screen placed in the path of the flow is modeled numerically. The ga s influence of the permeability of the screen on the overall picture o f the interaction and on the parameters of the resulting how is studie d. (C) 1997 American Institute of Physics. [S1063-7842(97)00405-4].