Coalescence of drops and bubbles rising through a non-newtonian fluid in a tube

Eisa Al-Matroushi, Ali Borhan

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Citations (Scopus)


We conducted an experimental study of the interaction and coalescence of two drops (of the same fluid) or bubbles translating under the action of buoyancy in a cylindrical tube. The close approach of two Newtonian fluid particles of different size in a non-Newtonian continuous phase was examined using image analysis, and measurements of the coalescence time are reported for various particle size ratios, Bond numbers, and particle-to-suspending-fluid viscosity ratios. The flow disturbance behind the leading bubble and the viscoelastic nature of the continuous phase seemed to retard bubble coalescence. The time scale for coalescence of liquid drops in highly elastic continuous phase was influenced by the relative motion of the drops and their coalescence behavior.

Original languageEnglish
Title of host publicationInterdisciplinary Transport Phenomena Fluid, Thermal, Biological, Materials, and Space Sciences
PublisherBlackwell Publishing Inc.
Number of pages9
ISBN (Print)9781573317122
Publication statusPublished - Apr 2009

Publication series

NameAnnals of the New York Academy of Sciences
ISSN (Print)0077-8923
ISSN (Electronic)1749-6632


  • Bubbles
  • Coalescence
  • Non-Newtonian fluid

ASJC Scopus subject areas

  • General Neuroscience
  • General Biochemistry,Genetics and Molecular Biology
  • History and Philosophy of Science


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