CFD Simulation of Condensing Vapor Bubble using VOF Model
In this study, direct numerical simulation for the bubble condensation in the subcooled boiling flow was performed. The main goal was to develop the CFD modeling for the bubble condensation and to evaluate the accuracy of the VOF model with the developed CFD modeling. CFD modeling for the bubble condensation was developed by modeling the source terms in the governing equations of VOF model using UDF. In the modeling, the amount of condensation was determined using the interfacial heat transfer coefficient obtained from the bubble velocity, liquid temperature and bubble diameter every time step. To evaluate the VOF model using the CFD modeling for the bubble condensation, CFD simulation results were compared with SNU experimental results such as bubble volume and shape, interfacial area, bubble diameter and bubble velocity. Simulation results predicted well the behavior of the actual condensing bubble. Therefore, it can be concluded that the VOF model using the CFD modeling for the bubble condensation will be a useful computational fluid dynamics tool for analyzing the behavior of the condensing bubble in a wide range of the subcooled boiling flow.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1054954Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 6112
 B.G.M. van Wachem and J.C.Schouten, "Experimental Validation 3-D Lagrangian VOF Model: Bubble Shape and Rise Velocity," AIChE Journal, vol.48, pp. 2744-2753, 2002.
 Daniel Lorstad and Laszlo Fuchs, "High-order surface tension VOF-model for 3D bubble flows with high density ratio," Journal of Computational Physics, vol. 200, pp. 153-176, 2004.
 Li Chen and Yuguo Li, "A numerical method for two-phase flows with an interface," Environmental Modeling & Software, vol. 13, pp. 247-255, 1998.
 M. van Sint Annaland, N.G. Deen and J.A.M. Kuipers, "Numerical simulation of gas bubbles behavior using a three-dimensional volume of fluid method," Chemical Engineering Science, vol. 60, pp. 2999-3011, 2005.
 5. Vinay R. Gopala and Berend G.M. van Wachem, "Volume of fluid methods for immiscible-fluid and free-surface flows," Chemical Engineering Journal, vol.141, pp. 204-221, 2008.
 Seong-Jin Kim and Goon-Cherl Park, "Interfacial Heat Transfer of Condensing Bubble in Subcooled Boiling Flow at Low Pressure," HEAT 2008, Fifth International Conference on Transport Phenomena In Multiphase Systems, Bialystok, Poland, June 30-July 3, 2008.
 Hirt, C.W. and Nichols, B.D., "Volume of fluid (VOF) method for the dynamics of free boundaries," J. Comp. Phys, vol. 39, pp. 201-225, 1982.
 Fluent 6.0 Users Guide Documentation, Fluent Inc, 2001.