Source flow expansion of monatomic gas into vacuum under external field of forces

Details Source flow expansion of monatomic gas into vacuum under external field of forces Source flow expansion of monatomic gas into vacuum under external field of forces

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.113..249e&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 113, no. 2, July 1985, p. 249-256.

Astronomy and Astrophysics

Astrophysics

Gas Expansion, Gas Flow, Monatomic Gases, Vacuum, Density Distribution, Maxwell Fluids, Temperature Distribution

Scientific paper

The steady flow expansions of monatomic gases consisting of Maxwellian molecules into a vacuum moving under external forces with a source of spherical symmetry are investigated. The analysis is based on the B-G-K model of the Boltzmann equation with the approximation in hypersonic limit. The kinetic equation is solved by using the moment method. Analytical forms for the density and temperature are obtained for small and large distances from the source. The results show that the temperature in free expansion is less than that in the case of the expansion under the influence of external field of forces.

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