Accession Number : AD0705136

Title :   MEASUREMENT OF THERMAL DIFFUSIVITY IN SMALL SAMPLES,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Pridmore-Brown,David C.

Report Date : 15 FEB 1970

Pagination or Media Count : 18

Abstract : An analysis is presented that relates the thermal diffusivity of a small sample in the shape of a disc to the change in phase across the sample of a thermal wave that is set up in it by irradiating one of its traces with a modulated beam of thermal radiation. This analysis is a generalization of one given by Cowan, who treated the one-dimensional case where the sample was in the form of a thin slab. Numerical results illustrating the importance of two-dimensional effects are included. (Author)

Descriptors :   (*THERMAL DIFFUSION, MEASUREMENT), HIGH TEMPERATURE, THERMAL RADIATION, MODULATION, TEMPERATURE, PHASE

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE