ALTERNATIVE MODELS AND NUMERICAL SIMULATIONS OF RAREFIED GAS FLOW IN VACUUM SYSTEMS

Jeerasak Pitakarnnop, Rugkanawan Wongpithayadisai, Suwat Phanakulwijit

Abstract

An analytical and a numerical studies of rarefied gas effects on the flow through a vacuum pipe at low operating pressure are performed by the use of both continuum and kinetic approaches. The pipe operates in a high-Knudsen-, low-Reynolds numbers regime where the viscous effects dominate the flow. Since only the isothermal flow is focused, the slip-flow at the wall is the main anomaly. A comparison of the calculation results with those from the available measurements shows good agreement.

Keywords

vacuum, slip-flow, leak, rarefied gas

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IMEKO-WC-2015-TC16-337.pdf

DOI

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IMEKO TC

TC16 - Pressure and Vacuum Measurement

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