Dynamics of an air bubble rising in viscosity-stratified fluids

Ram, Premlata Amarnath and Sahu, Kirti Chandra (2017) Dynamics of an air bubble rising in viscosity-stratified fluids. Masters thesis, Indian Institute of Technology, Hyderabad.

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The bubble rise dynamics in an unconfined quiescent viscosity-stratified medium has been numerically investigated. This is frequently encountered in industrial as well as natural phenomena. In spite of the large number of studies carried out on bubbles and drops, very few studies have examined the influence of viscosity stratification on bubble rise dynamics. To the best of our knowledge, none of them have isolated the effects of viscosity-stratification alone, even though it is known to influence the dynamics extensively, which is the main objective of the present study. Our results demonstrate some counter-intuitive phenomena for certain range of parameters due to the presence of viscosity stratification in the surrounding fluid. It is also observed that the effect of viscosity stratification is qualitatively different for different regimes of the dimensionless parameters. In future, it will be interesting to investigate this problem in three-dimensions

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IITH Creators:
IITH CreatorsORCiD
Sahu, Kirti Chandrahttp://orcid.org/0000-0002-7357-1141
Item Type: Thesis (Masters)
Uncontrolled Keywords: Bubbles, Multiphase Flow
Subjects: Chemical Engineering
Divisions: Department of Chemical Engineering
Depositing User: Team Library
Date Deposited: 09 Apr 2018 06:29
Last Modified: 22 May 2019 06:50
URI: http://raiith.iith.ac.in/id/eprint/3849
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