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Numerical Modeling of Multiple Bubbles Condensation in Subcooled Flow Boiling

Liu, Zhenyu; Sundén, Bengt LU and Wu, Huiying (2015) In Journal of Thermal Science and Engineering Apllications 7(3).
Abstract
The understanding of multiple bubbles condensation is of significant importance in developing continuum models for the large-scale subcooled flow boiling. The computational fluid dynamics (CFD) modeling for multiple bubbles condensation is developed with the volume of fluid (VOF) method in this work. An explicit transient simulation is performed to solve the governing equations including the source terms for heat and mass transfer due to 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, which is taken into account in the numerical model. Numerical... (More)
The understanding of multiple bubbles condensation is of significant importance in developing continuum models for the large-scale subcooled flow boiling. The computational fluid dynamics (CFD) modeling for multiple bubbles condensation is developed with the volume of fluid (VOF) method in this work. An explicit transient simulation is performed to solve the governing equations including the source terms for heat and mass transfer due to 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, which is taken into account in the numerical model. Numerical simulations predict the dynamical behavior of the actual condensing bubbles. The results show that the condensation rate of a single bubble is influenced by the velocity of the fluid flow and the temperature difference between the bubble and fluid. For multiple bubbles, the effect of bubble-bubble interaction on their condensation process 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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Thermal Science and Engineering Apllications
volume
7
issue
3
publisher
American Society Of Mechanical Engineers (ASME)
external identifiers
  • wos:000363385900004
  • scopus:84994633910
ISSN
1948-5093
DOI
10.1115/1.4029953
language
English
LU publication?
yes
id
617f8cfb-778f-4578-994e-bd761fed4e67 (old id 8201608)
date added to LUP
2015-11-26 12:09:03
date last changed
2017-09-24 03:09:11
@article{617f8cfb-778f-4578-994e-bd761fed4e67,
  abstract     = {The understanding of multiple bubbles condensation is of significant importance in developing continuum models for the large-scale subcooled flow boiling. The computational fluid dynamics (CFD) modeling for multiple bubbles condensation is developed with the volume of fluid (VOF) method in this work. An explicit transient simulation is performed to solve the governing equations including the source terms for heat and mass transfer due to 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, which is taken into account in the numerical model. Numerical simulations predict the dynamical behavior of the actual condensing bubbles. The results show that the condensation rate of a single bubble is influenced by the velocity of the fluid flow and the temperature difference between the bubble and fluid. For multiple bubbles, the effect of bubble-bubble interaction on their condensation process 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.},
  articleno    = {031003},
  author       = {Liu, Zhenyu and Sundén, Bengt and Wu, Huiying},
  issn         = {1948-5093},
  language     = {eng},
  number       = {3},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  series       = {Journal of Thermal Science and Engineering Apllications},
  title        = {Numerical Modeling of Multiple Bubbles Condensation in Subcooled Flow Boiling},
  url          = {http://dx.doi.org/10.1115/1.4029953},
  volume       = {7},
  year         = {2015},
}