DISTRIBUTION FUNCTION AND TEMPERATURES IN A MONATOMIC GAS UNDER STEADY EXPANSION INTO A VACUUM
Abstract
The distribution function for the spherical source is determined by integrating the B-G-K model equation, where the local temperature is determined by the moment equations under the hypersonic approximation. In the far field, the axial distribution is nearly Maxwellian. A free molecule limit exists, but does not define the lateral temperature and higher moments properly. The lateral temperature is determined by far field collisions, and is largely contained in the tail of the lateral distribution. A Mach number or a Reynolds number similarity in the distribution function is shown.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1966
- Accession Number
- AD0643270
Entities
People
- Hsien K. Cheng
- Richard H. Edwards
Organizations
- University of Southern California