Motion of an air bubble under the action of thermocapillary and buoyancy forces

Tripathi, Manoj Kumar and Sahu, Kirti Chandra (2018) Motion of an air bubble under the action of thermocapillary and buoyancy forces. Computers and Fluids, 177. pp. 58-68. ISSN 0045-7930

Full text not available from this repository. (Request a copy)

Abstract

A novel way to handle surface tension gradient driven flows is developed in the volume-of-fluid (VoF) framework. Using an open source Navier–Stokes solver, Basilisk, and the present formulation, we investigate thermocapillary migration of drops/bubbles in a surrounding medium. Several validation exercises have been performed, which demonstrate that the present solver is a robust one to investigate interfacial flows with variable surface tension. It is well known that it is a challenging task to numerically model the tangential and normal surface forces arising due to interfacial tension. We have shown that the present method does not require the artificial smearing of surface tension about the interface, and thus predicts the theoretical value of the terminal velocity of bubble/drop migrating due to an imposed temperature gradient very well. It is also demonstrated that the present solver provides accurate results for problems exhibiting the gravity and thermocapillary forces simultaneously, and useful for systems with high viscosity and density ratios.

[error in script]
IITH Creators:
IITH CreatorsORCiD
Sahu, Kirti Chandrahttp://orcid.org/0000-0002-7357-1141
Item Type: Article
Uncontrolled Keywords: Marangoni flows, Bubble rise, Buoyancy driven flow, Thermocapillary flow
Subjects: Chemical Engineering
Divisions: Department of Chemical Engineering
Depositing User: Team Library
Date Deposited: 29 Oct 2018 05:19
Last Modified: 29 Oct 2018 05:19
URI: http://raiith.iith.ac.in/id/eprint/4501
Publisher URL: http://doi.org/10.1016/j.compfluid.2018.10.003
OA policy: http://www.sherpa.ac.uk/romeo/issn/0045-7930/
Related URLs:

Actions (login required)

View Item View Item
Statistics for RAIITH ePrint 4501 Statistics for this ePrint Item