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Metallurgical and Materials Transactions B

, Volume 50, Issue 1, pp 10–15 | Cite as

Rise of Gas Bubbles Across the Interface Between Two Liquids

  • Albin Rozario
  • Nurni N. Viswanathan
  • Somnath BasuEmail author
Communication
First Online:
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Abstract

Water and different oils were used to represent liquid metal and slag, respectively, in a cold model simulation of gas bubbles rising through molten metal and slag layers. It was seen that the ascending gas bubbles appeared to attain a quasi-stationary state for a finite duration at the interface between the two liquid layers. The magnitude of this apparent residence time was dependent on draining of the liquid film around the bubble, which, in turn, influenced the entrainment of the heavier liquid into the lighter one.

Nomenclature

ρwater

Density of water

ρoil

Density of oil

ηoil

Dynamic viscosity of oil

νoil

Kinematic viscosity of oil

τ1

Apparent residence time of a bubble at the water-oil interface

τ2

Time for complete drainage of water film after the bubble starts to rise through the oil layer

Vf

Terminal velocity of a rising bubble in oil (after complete drainage of the water film)

Δ(ρ)

Difference in density between oil and water, ρw – ρo

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2018

Authors and Affiliations

  • Albin Rozario
    • 1
  • Nurni N. Viswanathan
    • 2
  • Somnath Basu
    • 2
    Email author
  1. 1.Praxair India Pvt. Ltd.PuneIndia
  2. 2.Metallurgical Engineering & Materials Science DepartmentIndian Institute of Technology BombayMumbaiIndia

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