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 TVT, 2008, Volume 46, Issue 2, Pages 257–261 (Mi tvt1046)

Heat and Mass Transfer and Physical Gasdynamics

The effect of the flow-to-wall temperature ratio on strong condensation of gas

A. A. Abramov, A. V. Butkovskay

Central Aerohydrodynamic Institute

Abstract: The method of direct statistical simulation is used to investigate the effect of the flow-to-wall temperature ratio $T$ on the strong subsonic condensation of monatomic gas. It is demonstrated that the dependence of relative pressure at the boundary of the Knudsen layer on relative temperature at a fixed value of the Mach number $M$ has a minimum. In so doing, the marked supercooling of condensing gas ($T < 1$) causes an abrupt increase in relative pressure. At the same time, for a «moderately cold» wall ($1.5 < T < 10$), the dependence of relative pressure on relative temperature at a fixed value of $M$ is very weak. It is demonstrated that, in the case of supersonic condensation, the dependence of minimal possible relative pressure on $T$ at a fixed value of $M$ likewise has a minimum. The calculation results agree well with the results of calculations by the method of moments using the suggested approximation of the molecule distribution function.

Full text: PDF file (394 kB)

English version:
High Temperature, 2008, 46:2, 229–233

Bibliographic databases:

UDC: 533. 722
PACS: 68.03.Fg, 47.55.dr

Citation: A. A. Abramov, A. V. Butkovskay, “The effect of the flow-to-wall temperature ratio on strong condensation of gas”, TVT, 46:2 (2008), 257–261; High Temperature, 46:2 (2008), 229–233

Citation in format AMSBIB
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