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RESEARCH PAPERS

Heat Transfer and Forces on Concave Surfaces in a Free Molecular Flow

[+] Author and Article Information
Chien Fan

Aeromechanics Department, Lockheed Missiles & Space Co., Huntsville, Ala.

J. Heat Transfer 95(1), 107-112 (Feb 01, 1973) (6 pages) doi:10.1115/1.3449977 History: Received August 02, 1971; Revised February 14, 1972; Online August 11, 2010

Abstract

A Monte Carlo modeling technique is described for mathematically simulating free molecular flows over a concave spherical surface and a concave cylindrical surface of finite length. The half-angle of the surfaces may vary from 0 to 90 deg, and the incident flow may have an arbitrary speed ratio and an arbitrary angle of attack. Partial diffuse reflection and imperfect energy accommodation for molecules colliding with the surfaces are also considered. Results of heat transfer, drag, and lift coefficients are presented for a variety of flow conditions. The present Monte Carlo results are shown to be in very good agreement with certain available theoretical solutions.

Copyright © 1973 by ASME
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