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Energy and Environment, 1995

ISBN:
1-56700-052-5 (Print)

APPLICATION OF HOLOGRAPHIC INTERFEROMETRY AND LIQUID CRYSTAL THERMOGRAPHY TO FORCED CONVECTION HEAT TRANSFER FROM A RIB-ROUGHENED CHANNEL

Giovanni Tanda
DIME, Università degli Studi di Genova

J. Stasiek
Thermo-Fluids Engineering Research Centre, The City University, U.K.

Michael W. Collins
Thermo-Fluids Engineering Research Centre, The City University, London EC1V OHB, UK

Abstract

The non-invasive optical techniques of holographic interferometry and liquid crystal thermography have been applied to the study of heat transfer by forced convection from a rib-toughened channel. Two test sections were built in order to carry out separate experiments using the two optical methods. The investigated geometry consisted of a plane heated wall with square ribs attached at regular intervals. The rib pitch to height ratio was 7.2 for all experiments. Results obtained from both techniques, presented in terms of local Nusselt number distributions, were found to be in satisfactory agreement.