A parametric study of buoyancy-driven flow of two-immiscible fluids in a differentially heated inclined channel

Wakale, A B and K, Venkatasubbaiah and Sahu, Kirti Chandra (2015) A parametric study of buoyancy-driven flow of two-immiscible fluids in a differentially heated inclined channel. Computers and Fluids, 17 (01). pp. 54-61. ISSN 0045-7930

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The buoyancy-driven interpenetration of two immiscible fluids in a differentially heated inclined channel is investigated by solving the Navier-Stokes, the continuity and the energy equations along with Cahn-Hillard equation to track the interface. After conducting a grid convergence test, a parametric study is conducted to investigate the effects of Reynolds number, Bond number, Marangoni number, density ratio, viscosity ratio and temperature difference between the walls (δ. T) on flow dynamics and interfacial instability between two immiscible fluids. We found that increasing Reynolds number, Bond number, δ. T, density ratio and decreasing viscosity ratio destabilizes the flow dynamics by increasing the intensity of vortical structures and 'mixing' of the fluids. The flow dynamics of vortical structures are altered by the imposed temperature gradient between the walls in comparison with isothermal system. We found a critical Bo below which the surface tension force dominates the gravitational force for the set of parameter values considered, which in turn give rise to stationary stable interface.

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IITH Creators:
IITH CreatorsORCiD
Venkatasubbaiah, KUNSPECIFIED
Sahu, Kirti Chandrahttp://orcid.org/0000-0002-7357-1141
Item Type: Article
Uncontrolled Keywords: Buoyancy-driven flow; Immiscible flow; Interfacial instability; Multiphase flow; Mixing; Laminar flow
Subjects: Chemical Engineering > Biochemical Engineering
Divisions: Department of Chemical Engineering
Department of Physics
Depositing User: Library Staff
Date Deposited: 03 Jun 2015 07:28
Last Modified: 14 May 2018 10:50
URI: http://raiith.iith.ac.in/id/eprint/1550
Publisher URL: https://doi.org/10.1016/j.compfluid.2015.04.021
OA policy: http://www.sherpa.ac.uk/romeo/issn/0045-7930/
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