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ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

COMPUTATIONAL STUDY OF HEAT TRANSFER FROM A CONFINED TURBULENT SLOT JET IMPINGING ON A MOVING PLATE

Get access (open in a dialog) DOI: 10.1615/IHTC13.p16.20
12 pages

Abstract

Convective heat transfer from a moving isothermal hot plate due to confined slot-jet impingement is investigated numerically. The flow is considered two-dimensional and turbulent. The rectangular flow geometry consists of a confining adiabatic wall placed parallel to the moving impingement surface with the slot-jet located in the middle of the confining wall. Computations are performed using the FLUENT commercial CFD code. The standard k − ε turbulence model with enhanced wall treatment is used for the turbulence computations. The problem parameters are the jet exit Reynolds number, ranging from 5,000 to 20,000, the normalized plate velocity, ranging from 0 to 2, and the normalized distance of separation between the impingement plate and the jet exit, ranging from 6 to 8. The computed flow patterns and isotherms for various combinations of these problem parameters are analysed and presented to cognize the heat transfer phenomena. The distribution of the local and average Nusselt numbers and the skin friction coefficients at the hot moving surface for above combinations of the flow parameters are also presented. Results are compared against corresponding cases for heat transfer from a stationary plate in order to comprehend the effects of the plate velocity on the resulting heat transfer process. The analysis reveals that the average Nusselt number increases considerably with the jet exit Reynolds number as well as with the plate velocity. The average skin friction coefficient, on the other hand, is relatively insensitive to the Reynolds number but increases significantly with the plate velocity.