Numerical investigation on coalescence of bubble pairs rising in a stagnant liquid

R. H. Chen, W. X. Tian*, G. H. Su, S. Z. Qiu, Yuki Ishiwatari, Yoshiaki Oka

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

110 Citations (Scopus)


In the present study, we preformed a two-dimensional numerical simulation of the motion and coalescence of bubble pairs rising in the stationary liquid pool, using the moving particle semi-implicit (MPS) method. Moving particles were used to describe the liquid phase and the vapor phase was evaluated using real vapor sate equation. The bubble-liquid interface was set to be a free surface boundary which could be captured according to the motion and location of interfacial particles. The behaviors of coalescence between two identical bubbles predicted by the MPS method were in good agreement with the experimental results reported in the literature. Numerical results indicated that the rising velocity of the trailing bubble was larger than that of the leading bubble. Both of the leading bubble and the trailing bubble rose faster than the isolated bubble. After coalescence, the coalesced bubble showed velocity and volume oscillations. The time of the volume oscillations increased with increasing initial bubble diameter. The wake flow and vortex would form behind the coalesced bubble.

Original languageEnglish
Pages (from-to)5055-5063
Number of pages9
JournalChemical Engineering Science
Issue number21
Publication statusPublished - 2011 Nov 1


  • Bubble pair
  • Bubble velocity
  • Coalescence
  • Moving particle semi-implicit method
  • Numerical simulation
  • Two-phase flow

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Applied Mathematics
  • Industrial and Manufacturing Engineering


Dive into the research topics of 'Numerical investigation on coalescence of bubble pairs rising in a stagnant liquid'. Together they form a unique fingerprint.

Cite this