Multiphase lattice Boltzmann simulations of buoyancy-induced flow of two immiscible fluids with different viscosities

Prasanna R. Redapangu; S. P. Vanka; Kirti Chandra Sahu

doi:10.1016/j.euromechflu.2012.01.006

Multiphase lattice Boltzmann simulations of buoyancy-induced flow of two immiscible fluids with different viscosities

Prasanna R. Redapangu, S. P. Vanka, Kirti Chandra Sahu

Mechanical Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

We study the effects of viscosity differential on buoyancy-induced interpenetration of two immiscible fluids in a tilted channel using a two-phase lattice Boltzmann method implemented on a graphics processing unit. The effects of viscosity differential on the flow structures, average density profiles and front velocities are studied. Relatively stable fingers are observed for high viscosity ratios. The intensity of the interfacial instabilities and the transverse interpenetration of the fluids are seen to increase with decreasing viscosity differential of the fluids.

Original language	English (US)
Pages (from-to)	105-114
Number of pages	10
Journal	European Journal of Mechanics, B/Fluids
Volume	34
DOIs	https://doi.org/10.1016/j.euromechflu.2012.01.006
State	Published - Jul 2012

Keywords

Fluid mechanics
Interface
Laminar flow
Lattice Boltzmann simulation
Mixing
Multiphase flow

ASJC Scopus subject areas

Mathematical Physics
General Physics and Astronomy

Online availability

10.1016/j.euromechflu.2012.01.006

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title = "Multiphase lattice Boltzmann simulations of buoyancy-induced flow of two immiscible fluids with different viscosities",

abstract = "We study the effects of viscosity differential on buoyancy-induced interpenetration of two immiscible fluids in a tilted channel using a two-phase lattice Boltzmann method implemented on a graphics processing unit. The effects of viscosity differential on the flow structures, average density profiles and front velocities are studied. Relatively stable fingers are observed for high viscosity ratios. The intensity of the interfacial instabilities and the transverse interpenetration of the fluids are seen to increase with decreasing viscosity differential of the fluids.",

keywords = "Fluid mechanics, Interface, Laminar flow, Lattice Boltzmann simulation, Mixing, Multiphase flow",

author = "Redapangu, {Prasanna R.} and Vanka, {S. P.} and Sahu, {Kirti Chandra}",

note = "Funding Information: We thank Dr. Aaron Shinn for assistance in the GPU implementation of the code. The support from Indian Institute of Technology Hyderabad, India is gratefully acknowledged. We also thank the Department of Science and Technology, India for their partial financial support.",

year = "2012",

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doi = "10.1016/j.euromechflu.2012.01.006",

language = "English (US)",

volume = "34",

pages = "105--114",

journal = "European Journal of Mechanics, B/Fluids",

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T1 - Multiphase lattice Boltzmann simulations of buoyancy-induced flow of two immiscible fluids with different viscosities

AU - Redapangu, Prasanna R.

AU - Vanka, S. P.

AU - Sahu, Kirti Chandra

N1 - Funding Information: We thank Dr. Aaron Shinn for assistance in the GPU implementation of the code. The support from Indian Institute of Technology Hyderabad, India is gratefully acknowledged. We also thank the Department of Science and Technology, India for their partial financial support.

PY - 2012/7

Y1 - 2012/7

N2 - We study the effects of viscosity differential on buoyancy-induced interpenetration of two immiscible fluids in a tilted channel using a two-phase lattice Boltzmann method implemented on a graphics processing unit. The effects of viscosity differential on the flow structures, average density profiles and front velocities are studied. Relatively stable fingers are observed for high viscosity ratios. The intensity of the interfacial instabilities and the transverse interpenetration of the fluids are seen to increase with decreasing viscosity differential of the fluids.

AB - We study the effects of viscosity differential on buoyancy-induced interpenetration of two immiscible fluids in a tilted channel using a two-phase lattice Boltzmann method implemented on a graphics processing unit. The effects of viscosity differential on the flow structures, average density profiles and front velocities are studied. Relatively stable fingers are observed for high viscosity ratios. The intensity of the interfacial instabilities and the transverse interpenetration of the fluids are seen to increase with decreasing viscosity differential of the fluids.

KW - Fluid mechanics

KW - Interface

KW - Laminar flow

KW - Lattice Boltzmann simulation

KW - Mixing

KW - Multiphase flow

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M3 - Article

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VL - 34

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EP - 114

JO - European Journal of Mechanics, B/Fluids

JF - European Journal of Mechanics, B/Fluids

ER -

Multiphase lattice Boltzmann simulations of buoyancy-induced flow of two immiscible fluids with different viscosities

Abstract

Keywords

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