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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

BIFURCATIONS OF RADIATIVE-CONDUCTIVE TEMPERATURE WAVES

Get access (open in a dialog) DOI: 10.1615/IHTC10.4930
pages 43-50

Resumo

The thermal wave and flash technique have been widely used to determine the thermal and optical properties of condensed matter. At high temperatures the radiation in the semi-transparent media can make an important contribution to the heat transfer, but this effect has been taken into account only in several works by using either direct numerical simulation or rough approximations for radiative transfer. The present work considers the structure of an exact analytical solution to the system of radiative transport and energy equations of radiative-conductive heat transfer. Based on this solution a thermal waves classification is proposed and a new effect of thermal waves bifurcations is predicted. The bifurcation is the appearance/disappearance of additional pair of thermal waves while the frequency of external heat action or the mean temperature of a medium are changing slowly. The bifurcation arises from competition between radiative and conductive heat transfer.