Thermal Diffusivity Determination of High-Temperature Levitated Oblate Spheroidal Specimen by a Flash Method

[+] Author and Article Information
F. Shen, J. M. Khodadadi

Department of Mechanical Engineering, Auburn University, 201 Ross Hall, Auburn, AL 36849-5341

J. Heat Transfer 120(3), 777-781 (Aug 01, 1998) (5 pages) doi:10.1115/1.2824350 History: Received April 14, 1997; Revised March 18, 1998; Online December 05, 2007


In extending the range of applicability of a recently developed method, a single-step containerless flash technique for determining the thermal diffusivity of levitated oblate spheroidal oblate spheroidal samples is proposed. The flash method is modeled as an axisymmetric transient conduction heat transfer problem within the oblate spheroid. It is shown that by knowing the sample geometric parameters and recording the temperature rise history at least at two different points on the surface simultaneously, the thermal diffusivity can be determined without knowing needed for determining the thermal diffusivity of oblate spheroidal samples are provided.

Copyright © 1998 by The American Society of Mechanical Engineers
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