標題: Phase change calculations for film boiling flows
作者: Tsui, Yeng-Yung
Lin, Shi-Wen
Lai, Yin-Nan
Wu, Feng-Chi
機械工程學系
Department of Mechanical Engineering
關鍵字: Film boiling;Two-phase flow;Phase change;VOF method;Numerical simulation
公開日期: 1-三月-2014
摘要: A new VOF based interface tracking method, termed CISIT, developed by the present authors recently is extended to include heat and mass transfer due to phase change. In this method, the interface is represented by the contour surface of VOF value 0.5. The interface is advanced in a conservative predictioncorrection manner to ensure that the distribution of the VOF is a good approximation to the Heaviside function. An important issue related to the mass transfer across the interface is the treatment of the jump condition for the energy equation. The interface is tackled as an internal boundary for temperature field. The heat flux at the boundary is calculated separately in individual phase. However, unlike other studies, the energy equation for the two phases is solved simultaneously in an implicit way. This method is validated through tests on model problems for which theoretical solutions are available. Calculations are then performed to simulate boiling bubble flows emerging from a planar film and a circular film. The latter case also serves to demonstrate that the present methodology is applicable to phase change flows with irregular geometry. Different boiling modes are identified according to the superheated temperatures. (C) 2013 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2013.11.061
http://hdl.handle.net/11536/23770
ISSN: 0017-9310
DOI: 10.1016/j.ijheatmasstransfer.2013.11.061
期刊: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume: 70
Issue: 
起始頁: 745
結束頁: 757
顯示於類別:期刊論文


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