Numerical simulation of wall bounded and electrically excited Rayleigh-Taylor instability using incompressible smoothed particle hydrodynamics

被引：46

作者：

Rahmat, A. ^{[1
]}

Tofighi, N. ^{[1
]}

Shadloo, M. S. ^{[1
]}

Yildiz, M. ^{[1
]}

机构：

[1] Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkey

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2014年 / 460卷

关键词：

Smoothed particle hydrodynamics; Multi-phase flow; Interfacial flow; Wall bounded flow; Rayleigh-Taylor instability; Electrohydrodynamics; SPH; ELECTROHYDRODYNAMICS;

D O I：

10.1016/j.colsurfa.2014.02.044

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Numerical simulations using incompressible smoothed particle hydrodynamics (ISPH) method have been conducted on Rayleigh-Taylor instability (RTI) in a confined domain having an Atwood number of 1/3, influenced by the presence of an external electric field. Leaky dielectric model is used for each of the flow phases having different electric permittivities and conductivities. Results obtained show noticeable differences in evolution characteristics when subjected to the external electric field. It is observed that exposing the two-phase system to the electric field when heavy fluid to light fluid ratio of electric permittivities is smaller than that of electric conductivities, the resulting force configuration on the interface promotes spike descent whereas a reverse configuration of the ratios will result in a faster ascent of the bubble, bearing dramatically different interfacial profiles. These effects have been found to intensify at larger electric permittivity and electric field magnitudes. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：60 / 70

页数：11

共 24 条

[1] Rayleigh-Taylor and Richtmyer-Meshkov instabilities for fluids with a finite density ratio [J].

Abarzhi, SI ;

Nishihara, K ;

Glimm, J .

PHYSICS LETTERS A, 2003, 317 (5-6) :470-476

[2] Suppression of Rayleigh-Taylor instability using electric fields [J].

Barannyk, Lyudmyla L. ;

Papageorgiou, Demetrios T. ;

Petropoulos, Peter G. .

MATHEMATICS AND COMPUTERS IN SIMULATION, 2012, 82 (06) :1008-1016

[3] A CONTINUUM METHOD FOR MODELING SURFACE-TENSION [J].

BRACKBILL, JU ;

KOTHE, DB ;

ZEMACH, C .

JOURNAL OF COMPUTATIONAL PHYSICS, 1992, 100 (02) :335-354

[4]

Chandrashekhar S., 1981, Hydrodynamic and Hydromagnetic Stability

[5] Formation of liquid columns on liquid-liquid interfaces under applied electric fields [J].

Dong, JH ;

de Almeida, VF ;

Tsouris, C .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2001, 242 (02) :327-336

[6]

Eringen A., 2011, ELECTRODYNAMICS CONT

[7] Analytical model of nonlinear, single-mode, classical Rayleigh-Taylor instability at arbitrary Atwood numbers [J].

Goncharov, VN .

PHYSICAL REVIEW LETTERS, 2002, 88 (13) :4-134502

[8] An Hamiltonian interface SPH formulation for multi-fluid and free surface flows [J].

Grenier, N. ;

Antuono, M. ;

Colagrossi, A. ;

Le Touze, D. ;

Alessandrini, B. .

JOURNAL OF COMPUTATIONAL PHYSICS, 2009, 228 (22) :8380-8393

[9] ELECTRICALLY INDUCED CONVECTION IN DIELECTRIC LIQUIDS [J].

GROSS, MJ ;

PORTER, JE .

NATURE, 1966, 212 (5068) :1343-&

[10] An incompressible multi-phase SPH method [J].

Hu, X. Y. ;

Adams, N. A. .

JOURNAL OF COMPUTATIONAL PHYSICS, 2007, 227 (01) :264-278

← 1 2 3 →