Influence of wetting conditions on bubble formation at orifice in an inviscid liquid: Mechanism of bubble evolution

A. V. Byakova, S. V. Gnyloskurenko, Takashi Nakamura, O. I. Raychenko

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

This paper presents some aspects of bubble formation under extremely low air flow rates (from 1 to 5cm3/min) through a single orifice (from 0.4 to 1.0mm in diameter) submerged in water and in a water-soap solution. Experiments were carried out at a wide range of contact angles (15°≤θ0≤110°). The mechanism distinctive for bubble formation was clarified over the evolution of force balance conditions and interface equilibrium occurred periodically at the critical points, which take place at the transitions between meaningful stages called the nucleation period, under critical growth period, critical growth period and necking period. Influence of operating variables on bubble formation under various wetting conditions at the orifice plate were revealed and discussed. As a rough guide to practical purposes the empirical correlation between the volume of the bubble formed at the end of its critical growth Vb in cm 3, and flow rate Q in cm3/s, multiplied by the maximum diameter of bubble periphery at the base D in cm, was found for inviscid liquids to be Vb=0.5DQ0.4. To express the correlation between the bubble volume V and flow rate Q in general form, the equation V=KoDn(Q2g-1)m, was developed assuming indices m and n to be varied, and 0≤n≤1 while 3/5≥m≥1/5, referring to certain ranges of gas flows.

Original languageEnglish
Pages (from-to)19-32
Number of pages14
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume229
Issue number1-3
DOIs
Publication statusPublished - 2003 Nov 24

Keywords

  • Bubble formation
  • Bubble volume
  • Orifice
  • Wettability

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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