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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

Study on Computational Method of Filmwise Non-Equilibrium Condensation

Get access (open in a dialog) DOI: 10.1615/IHTC15.cds.009887
pages 765-774

Resumo

A practical computational method for a liquid-vapor two-phase flow accompanied by the phase change at the interface is presented. We propose an intrinsic improvement in dealing with phase change by the introduction of the boundary condition at the non-equilibrium interface, which was derived by Sone and Onishi on the basis of the kinetic theory of gases. The boundary condition that gives the relationship between the phase change rate and the jump of physical properties was appropriately integrated with the numerical simulation based on the fluid-dynamics equations. The interface was captured by the volume-of-fluid (VOF) method associated by the piecewise linear interface construction (PLIC) scheme to improve the conservation property of volume. This method was applied for the film condensation around a horizontal cylinder. Our results showed that heat and fluid phenomena, including condensation to a liquid film, were successfully reproduced. The order of spatially averaged Nusselt number of our results were in good agreement with the theoretical value. We found that our method enabled us to simulate film condensation effectively.