In this paper, the problems of collisionless flows over a cylinder or a sphere are investigated. New flowfield formulas for the specular surface scenario are obtained, whereas past formulas to the scenario of a diffuse surface are simplified. All formulas are evaluated with a computer code. Several simulations with the direct simulation Monte–Carlo are performed, and the results are compared with these analytical results. In general, the agreement is satisfactory. These analytical results are quite complex; however, they explicitly illustrate the effects from several parameters, such as the specific heat and temperature ratios, and several geometry factors.
Collisionless Gas Flow over a Cylinder and a Sphere
Journal of Spacecraft and Rockets ; 52 , 5 ; 1495-1502
2015-09-01
Article (Journal)
Electronic Resource
English
Collisionless Gas Flow over a Cylinder and a Sphere
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