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COMPUTATIONAL STUDY OF TURBULENT MIXED CONVECTION IN VERTICAL FLAT DUCT UNDER OVERPOWER TRANSIENT

DOI: 10.1615/ICHMT.1997.IntSymLiqTwoPhaseFlowTranspPhenCHT.750
10 pages

A. Cihat Baytas
Istanbul Technical University, Faculty of Aeronautics and Astronautics, 34469 Maslak Istanbul, Turkey

A. Rustem Aslan
Istanbul Technical University, Institute For Nuclear Energy, Faculty of Aeronautics and Astronautics, 80626, Maslak, Istanbul, Turkey

Abstract

The turbulent mixed convection in a vertical flat duct under overpower wall transient is analysed numerically to simulate abnormal working conditions. A finite difference procedure based on LSOR is used to solve the governing equations. The effect of wall overpower transient on velocity, pressure and temperature fields and heat transfer on the walls are investigated for different periods which defines the severity of the abnormal situation. The abnormality is found to increase as the period decreases.

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