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NUMERICAL HEAT TRANSFER COEFFICIENT INVESTIGATIONS FOR TRANSIENT CONJUGATED CONDUCTION-CONVECTION OVER A FLAT PLATE

DOI: 10.1615/ICHMT.2009.CONV.290
9 pages

Ghazali MEBARKI
Laboratoire d'Etude des Systèmes Energétiques Industriels LESEI Département de mécanique, Faculté de technologie Université BATNA 2, ALGÉRIE

Mourad Rebay
University of Reims Champagne-Ardenne GRESPI / Faculte des Sciences PB 1039, 51687 Reims, France

Samir Rahal
Laboratoire LESEI - Département de mécanique Faculté des Sciences de l'Ingénieur, Université de Batna, Algérie

Résumé

In this work, a numerical study is carried out to characterize transient conjugated heat transfer coefficient at the fluid-solid wall interface of a flat plate having a non-negligible thickness. The plate is subjected to variable wall heat flux. The heat transfer coefficient is calculated as a function of the plate material, the plate thickness and the density of heat flux applied at its back face. Air flows with various inlet velocities have also been considered. The heat transfer coefficient evolutions, as a function of time, have been obtained for various positions along the plate. At first, high values of the heat coefficient are reached, and then it decreases and tends to constant values. It has been also noticed that at a fixed value of time, the heat transfer decreases when the position is increased from the beginning of the plate to its end.

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