Near-Free-Molecule Flow Calculations-Monte Carlo Study of Skimmer Interactions
TORONTO UNIV DOWNSVIEW (ONTARIO) INST FOR AEROSPACE STUDIES
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The Monte Carlo simulation method of G. A. Bird was applied to the study of flow through a skimmer using various geometries, speed ratios, and Knudsen numbers. The computer program followed a sample of 3500 hard sphere molecules, accumulating distribution function profiles in each of 25 regions of the flowfield, the beam profile at the downstream end of the flowfield, and the mass flow through the skimmer orifice. The results show beam intensities of the order of .3 of the no skimmer interaction value at Knudsen numbers of 01 and demonstrate clearly that most of the interaction occurs from 0 to 4 mean free paths upstream of the orifice.
- Physical Chemistry
- Fluid Mechanics