Masters Theses

Abstract

"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.

Advisor(s)

Howell, Ronald H. (Ronald Hunter), 1935-

Committee Member(s)

Muir, Clifford D.
Sauer, Harry J., Jr., 1935-2008

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering

Publisher

University of Missouri at Rolla

Publication Date

1968

Pagination

vii, 49 pages

Note about bibliography

Includes bibliographical references (leaves 63-64).

Rights

© 1968 Raymond John DeThorne, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Accommodation coefficient
Heat -- Transmission
Metals -- Surfaces -- Thermal properties
Metals -- Surfaces

Thesis Number

T 2121

Print OCLC #

5995633

Electronic OCLC #

803605474

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