Viscous potential flow analysis of Kelvin-Helmholtz instability of cylindrical interface
Mukesh Kumar Awasthi,G S Agrwal +1 more
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In this paper, a linear analysis of Kelvin-Helmholtz instability of cylindrical interface is carried out using viscous potential flow theory, and a dispersion relation has been obtained and stability criteria are given in the terms of relative velocity.Abstract:
A linear analysis of Kelvin-Helmholtz instability of cylindrical interface is carried out using viscous potential flow theory. In the inviscid potential flow theory, the viscous term in Navier-Stokes equation vanishes as viscosity is zero. In viscous potential flow, the viscous term in Navier-Stokes equation vanishes as vorticity is zero but viscosity is not zero. Viscosity enters through normal stress balance in viscous potential flow theory and tangential stresses are not considered. Both asymmetric and axisymmetric disturbances are considered. A dispersion relation has been obtained and stability criteria are given in the terms of the relative velocity. A comparison between inviscid potential flow and viscous potential flow has been made. It has been observed that Reynolds number and inner fluid fraction both have destabilizing effect on the stability of the system.read more
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Viscous correction for the viscous potential flow analysis of Kelvin–Helmholtz instability of cylindrical flow with heat and mass transfer
TL;DR: In this paper, an irrotational theory known as viscous correction for the viscous potential flow theory was proposed, in which the discontinuities in the IRR tangential velocity and shear stress are eliminated in the global energy balance by taking viscous contributions to the irROTational pressure.
Journal ArticleDOI
Viscous Potential Flow Analysis of Kelvin–Helmholtz Instability of a Cylindrical Flow with Heat and Mass Transfer
TL;DR: In this paper, a linear analysis of the instability of a cylindrical interface when there is heat and mass transfer across the interface, using viscous potential flow theory, was carried out.
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References
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Breakup of a liquid drop suddenly exposed to a high-speed airstream
TL;DR: In this article, a rotating drum camera was used to photograph viscous and viscoelastic drops in high speed airstream behind a shock wave in a shock tube, giving one photograph every 5 ms.
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Viscous potential flow analysis of Kelvin–Helmholtz instability in a channel
Toshio Funada,Daniel D. Joseph +1 more
TL;DR: In this article, the stability of stratified gas-liquid flow in a horizontal rectangular channel using viscous potential flow was analyzed and a dispersion relation was established, in which the effects of surface tension and viscosity on the normal stress are not neglected but the effect of shear stresses is.
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Viscous potential flow analysis of capillary instability
Toshio Funada,Daniel D. Joseph +1 more
TL;DR: In this article, a viscous fluid cylinder of diameter D surrounded by another fluid is determined by a Reynolds number J=VDρl/μl, a viscosity ratio m=μa/ml, and a density ratio l=ρa/ρl Here V=γ/μ l is the capillary collapse velocity based on the more viscous liquid which may be inside or outside the fluid cylinder.
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