Angular Distribution of Flow from Orifices and Tubes at High Knudsen Numbers
- 1 January 1967
- journal article
- Published by American Vacuum Society in Journal of Vacuum Science and Technology
- Vol. 4 (1) , 10-18
- https://doi.org/10.1116/1.1492511
Abstract
The flow of cesium vapor from orifices and tubes into vacuum was investigated experimentally. Using a surface ionization gauge, the intensity of the flow field was measured at various angular positions from the center line for Knudsen numbers ranging from approximately 1 to 100. The dependence of the angular distribution and center-line intensity on Knudsen number is reported for cylindrical apertures having length-to-diameter ratios of 0.04, 1.15, 3.03, and 5.63.Keywords
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