2024-03-29T09:19:11Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00030660
2023-01-16T05:08:24Z
320:2524:2525:2539
Direct Monte Carlo simulation of axisymmetric free jet
Soga, Takeo
101845
Kawato, Hiroshi
101846
Kim, Byung Gon
101847
1994-03-31
Axisymmetric expansion flow from a circular orifice into a vacuum was studied based upon the DSMC method. The numerical simulation was carried out for the gas composed of the hard sphere molecules. It is found that the radial temperature is slightly higher than the axial temperature in the vicinity of the orifice. The degree of such a nonequilibrium decreased in accordance with the decrease of the Knudsen number Kn. For the case of Kn=0.02 the difference between two temperatures was less than 2%. Present simulation revealed that in the vicinity of the axis of symmetry orifice flow expands like a spherical source flow but the off axis flow exhibites the peculiar features of axisymmetric expansion flow predicted by Grundy. The simulated expansion flow along the axis of symmetry includes continuum to free molecular flows. Present results, the terminal velocity, the terminal temperature, and the terminal Mach number, showed a good agreement with the previous results of spherical source flow expansion.
departmental bulletin paper
School of Engineering, Nagoya University
1994-03-31
Memoirs of the School of Engineering, Nagoya University
2
45
223
232
0919-0805
eng