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Numerical Modelling of Condensation of Multiple Bubbles in Subcooled Flow Boiling With VOF Method

[+] Author Affiliations
Zhenyu Liu

Shanghai Jiao Tong University, Shanghai, China

Bengt Sunden, Jinliang Yuan

Lund University, Lund, Sweden

Paper No. HT2013-17225, pp. V001T03A014; 8 pages
  • ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology
  • Volume 1: Heat Transfer in Energy Systems; Thermophysical Properties; Theory and Fundamental Research in Heat Transfer
  • Minneapolis, Minnesota, USA, July 14–19, 2013
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-5547-8
  • Copyright © 2013 by ASME


The understanding of condensation of multiple bubbles is of importance to improve the continuum models for the large-scale subcooled flow boiling. The CFD modeling for condensation of multiple bubbles has been developed with the Volume of Fluid (VOF) method in this work. An explicit transient simulation is performed to solve the governing equations along with the VOF equation and source terms for condensation. The Geometric Reconstruction Scheme, which is a Piecewise Linear Interface Calculation (PLIC) method, is employed to keep the interface sharp. The surface tension is modeled by the Continuum Surface Force (CSF) approach and is taken into account in the computations. Numerical simulation predicts the behavior of the actual condensing bubbles. The condensation rate of a single bubble can be influenced by the velocity of the fluid flow and the temperature difference between the bubble and fluid. The effect of interaction of the bubbles on the condensation is analyzed based on the numerical predictions. The condensation rate of lower bubbles increases due to the random perturbation induced by other bubbles. The influence of other bubbles on the condensation rate can be neglected if the distances between the bubbles are large enough.

Copyright © 2013 by ASME



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