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.

Issue Section:
Technical Briefs
Keywords:
Conduction, Liquid Metals, Thermophysical Properties
Topics:
High temperature, Thermal diffusivity, Heat conduction, Heat transfer, Liquid metals, Temperature, Transient heat transfer
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