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ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

STARTUP TRANSIENT MODELLING OF VAPOR FLOW IN HEAT PIPES

Get access (open in a dialog) DOI: 10.1615/IHTC9.1260
pages 33-38

Abstract

The transient behavior of vapor flow during the startup mode of heat pipe operation is analyzed numerically. The vapor core is modeled as a channel flow using a two dimensional compressible flow model. The centered difference scheme along with a nonlinear filtering technique is employed to overcome non-physical oscillations in flow variables. It is shown that Multiple Shockwave reflections are obtained near the evaporation region during the early stage of startup transient. Shock reflections induce time dependent flow reversals which are only transient and disappear as the dynamics approach steady state.