3D numerical investigation of bubble upflow condensation behaviors during subcooled flow boiling in mini-channel with VOSET

Shuqi Jin, Yujie Chen, Kong Ling, Weidong Xu, Wen Quan Tao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In the subcooled flow boiling process, bubble condensation is an inevitable basic phenomenon. This paper studies the condensation phenomenon of the single, double vertical/horizontal saturated bubbles rising in a three-dimensional mini-rectangular channel based on the interface capture method VOSET (coupled volume-of-fluid and level set method) and the phase transition model. Bubble condensation behaviors are investigated at different initial diameters, inlet velocity distributions, subcooling temperatures, bubble gaps, and arrangement for the two-bubble condensing system especially. The effects of these parametric on bubble motion trajectory, shape evolution, volume variation, and condensation rate are presented. The numerical results indicated that the initial bubble size and liquid subcooling play an important role in influencing the shape and volume variation of condensing bubble behaviors significantly, while the inlet velocity distribution only affects bubble motion trajectory. Furthermore, the interaction and coalescence between the bubbles will affect the bubble behaviors and the condensation rate. Finally, the condensation heat transfer coefficients at the bubble surfaces for different cases simulated in this paper are presented, seemingly first in the literature.

Original languageEnglish
Article number105040
JournalInternational Journal of Multiphase Flow
Volume182
DOIs
Publication statusPublished - Jan 2025
Externally publishedYes

Keywords

  • Bubble behaviors
  • Bubble condensation
  • Interface tracking method VOSET
  • Numerical simulation
  • Subcooled flow boiling

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