MODELING OF HEAT OUTFLOWS TO
A PROBE IN THERMOPHYSICAL TESTING

N. P. Zhukov

UDC 53.08.001.57

The nondestructive method developed by the author with the 
use of a linear pulsed heat source makes it possible to determine 
the thermophysical characteristics of solid materials on the basis 
of the portions of thermograms that correspond to the regularization 
of the thermal regime in the region of the heater and temperature 
detectors. Consideration has been given to the influence of the outflows 
of heat to a probe on the error in determining the thermophysical 
characteristics of materials in the case where two semiinfinite bodies 
are in ideal contact. A mathematical expression upon the fulfillment 
of which one may disregard the heat loss to the material of the probe 
substrate has been obtained. In the work, consideration has also been 
given to the problem of heat loss to the probe material in the case 
where it occurs only in the region of the heater. It has been shown 
that the temperatures of the first and second bodies in the contact 
area will become closer with time.

Tambov State Technical University, 106 Sovetskaya Str., 
Tambov, 392000, Russia. Translated from Inzhenerno-Fizicheskii Zhurnal, 
Vol. 78, No. 4, pp. 108-116, July-August, 2005. Original article 
submitted November 18, 2003; revision submitted July 2, 2004.