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Multiphase Science and Technology
SJR: 0.124 SNIP: 0.222 CiteScore™: 0.26

ISSN Imprimir: 0276-1459
ISSN On-line: 1943-6181

Multiphase Science and Technology

DOI: 10.1615/MultScienTechn.v18.i3.40
pages 277-304

NUMERICAL SIMULATION OF THE DYNAMICS OF MULTIPLE BUBBLE MERGER DURING POOL BOILING UNDER REDUCED GRAVITY

H. S. Aparajith
Mechanical and Aerospace Eng. Dept., University of California, Los Angeles, USA
Dean Vijay K. Dhir
Henry Samueli School of Engineering and Applied Science, Mechanical and Aerospace Engineering Department, University of California, Los Angeles, Los Angeles, California 90095, USA
Gihun Son
Dept. of Mechanical Engineering, Sogang University, Seoul, Republic of Korea

RESUMO

Numerical simulation of the growth and departure of multiple merging bubbles and associated heat transfer on a horizontal heated surface during pool boiling under low gravity conditions has been performed. A finite difference scheme is used to solve the equations governing mass, momentum and energy in the vapor liquid phases. The vapor-liquid interface is captured by level set method, which is modified to include the influence of phase change at the liquid-vapor interface. PF5060 is used as test liquid. The effects of reduced gravity condition and orientation of the cavities on the bubble diameter, interfacial structure, bubble merger time and departure time as well as local heat fluxes are studied.


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