"In the free molecule regime, Knudsen number greater than 10, heat is transferred from a solid by radiation and conduction. The ability of a surface to emit radiant energy is governed by a surface property called emittance while the surface property which apparently regulates the amount of heat transferred by conduction is called the thermal accommodation coefficient. This thesis presents the results of an experimental investigation to determine a relationship between these two properties, emittance and thermal accommodation coefficient. A test apparatus was constructed to measure both the radiation and conduction contributions between two concentric cylinders. cylinders of aluminum and steel, both with machined surfaces, were tested. The results of this investigation indicated no apparent relationship between the emittance and the thermal accommodation coefficient when air was used as the separating gas. Emittance was determined at pressures between 3 x 10⁻⁶ and 5.4 x 10⁻⁵ millimeters of mercury while pressures between 5.0 x 10⁻³ and 7.5 x 10⁻³ millimeters of mercury were used for the evaluation of the thermal accommodation coefficient"--Abstract, page ii.
Howell, Ronald H. (Ronald Hunter), 1935-
Muir, Clifford D.
Sauer, Harry J., Jr., 1935-2008
Mechanical and Aerospace Engineering
M.S. in Mechanical Engineering
University of Missouri at Rolla
vii, 49 pages
© 1968 Raymond John DeThorne, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Heat -- Transmission
Metals -- Surfaces -- Thermal properties
Metals -- Surfaces
Print OCLC #
Electronic OCLC #
Link to Catalog Record
DeThorne, Raymond John, "An experimental method of determining the thermal accommodation coefficients of metallic surfaces" (1968). Masters Theses. 6878.