Bubble Formation at Orifice in Viscoelastic Liquids

Koichi Terasaka, Hideki Tsuge

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


To evaluate the effect of viscoelasticity on bubble formation, four rheological parameters of viscoelastic liquids were defined and measured by a rheometer. The effects of operating conditions and concentration of polyacrylamide aqueous solutions (PAA) as viscoelastic liquids on bubble volume and the growth curve were experimentally measured. A high-speed video camera showed that the shapes of a bubble growing in viscoelastic liquids are not spherical. In this study, a nonspherical bubble formation model was proposed to theoretically estimate the volume, shape and growth curve of bubbles formed from an orifice submerged in viscoelastic liquids which are assumed to follow Maxwell's viscoelastic model. This experimental results in relatively low concentrations of PAA, as well as previous researchers' results, agreed relatively well with the calculated ones by this model.

Original languageEnglish
Pages (from-to)2903-2910
Number of pages8
JournalAIChE Journal
Issue number11
Publication statusPublished - 1997 Nov

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)


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