DRAG IN RAREFIED GASES.
SPACE SCIENCES INC WALTHAM MASS
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The present objectives in near and far space provide for environments that ultimately transcend the domain of validity of continuum theory. An understanding of phenomena such as drag in the transition domain or near free molecular domain cannot be analyzed by continuum concepts. In order to understand flow properties in highly rarefied gases, new mathematical techniques and equations need to be formulated in lieu of the continuum equations no longer applicable. The ultimate objective is to develop methods that will provide guidance to spacedynamic designers of vehicles orbiting in rarefied atmospheres, and at the same time to establish a mathematical framework suitable for an understanding of the interaction of rarefied gases and physical boundaries. The work accomplished under this contract is best summarized by the titles and abstracts of the four technical papers generated in its performance, as follows 1 Extension of Mott-Smith Method for a One Dimensional Shock Wave, 2 Kinetic Theory of the Leading Edge 3 Asymptotic Solutions of the Bhatnager -Gross-Krook Equation, and 4 Kinetic Theory of Diffusion in Rarefied Gases. Author
- Fluid Mechanics