A Dual Grid Level Set Method based study on similarity and difference between interface dynamics for surface tension and radial electric field induced jet breakup

2016 ◽  
Vol 148 ◽  
pp. 238-255 ◽  
Author(s):  
Absar M. Lakdawala ◽  
Atul Sharma ◽  
Rochish Thaokar
Keyword(s):  
Surface Tension ◽  
Electric Field ◽  
Level Set Method ◽  
Level Set ◽  
Radial Electric Field ◽  
Interface Dynamics ◽  
Jet Breakup ◽  
Similarity And Difference ◽  
Grid Level

Computation of a Propagating Interface in Multiphase Flows Using an Adaptive Coupled Level Set Method

2002 ◽  
Author(s):  
Ruquan Liang ◽  
Satoru Komori
Keyword(s):  
Surface Tension ◽  
Level Set Method ◽  
Level Set ◽  
Multiphase Flows ◽  
Surface Tension Force ◽  
Numerical Results ◽  
Passive Transport ◽  
Effect Of Surface ◽  
Good Agreement ◽  
Numerical Strategy

We present a numerical strategy for a propagating interface in multiphase flows using a level set method combined with a local mesh adaptative technique. We use the level set method to move the propagating interface in multiphase flows. We also use the local mesh adaptative technique to increase the grid resolution at regions near the propagating interface and additionally at the regions near points of high curvature with a minimum of additional expense. For illustration, we apply the adaptive coupled level set method to a collection of bubbles moving under passive transport. Good agreement has been obtained in the comparision of the numerical results for the collection of bubbles using an adaptative grid with those using a single grid. We also apply the adaptive coupled level set method to a droplet falling on a step where it is important to accurately model the effect of surface tension force and the motion of the free-surface, and the numerical results agree very closely with available data.

The Hybrid Particle-Level-Set Method Applied to Two-Phase Flows

2006 ◽  
Author(s):  
Daniel Gaudlitz ◽  
Nikolaus A. Adams
Keyword(s):  
Surface Tension ◽  
Level Set Method ◽  
Level Set ◽  
Mass Conservation ◽  
Two Phase Flows ◽  
Two Phase ◽  
Hybrid Particle ◽  
Particle Level ◽  
Tension Term ◽  
Particle Level Set Method

The hybrid particle-level-set method was proposed by Enright et al. (2002) for improving the efficiency and accuracy of the original level-set method. In this paper, we examine the discretization of the surface-tension term and of the reinitialization procedure with respect to their effect on the mass-conservation properties of the overall method. We apply the hybrid particle-level-set method for the computation of two-phase flows and assess its performance with different parameter choices in comparison with the original level-set method.

Calculation of droplet deformationby surface tension effects usingthe level set method

2002 ◽  
Vol 174 (11-12) ◽  
pp. 257-278 ◽  
Author(s):  
A. Balabel ◽  
B. Binninger ◽  
M. Herrmann ◽  
N. Peters
Keyword(s):  
Surface Tension ◽  
Level Set Method ◽  
Level Set

scholarly journals On surface tension modelling using the level set method

2009 ◽  
Vol 59 (2) ◽  
pp. 147-171 ◽  
Author(s):  
Sergey V. Shepel ◽  
Brian L. Smith
Keyword(s):  
Surface Tension ◽  
Level Set Method ◽  
Level Set

Axisymmetric and non-axisymmetric instability of an electrified viscous coaxial jet

2009 ◽  
Vol 632 ◽  
pp. 199-225 ◽  
Author(s):  
FANG LI ◽  
XIE-YUAN YIN ◽  
XIE-ZHEN YIN
Keyword(s):  
Surface Tension ◽  
Electric Field ◽  
Wavelength Region ◽  
Radial Electric Field ◽  
Liquid Viscosity ◽  
Long Wavelength ◽  
Chebyshev Spectral Collocation ◽  
Chebyshev Spectral Collocation Method ◽  
Axisymmetric Instability ◽  
Helical Mode

A linear study is carried out for the axisymmetric and non-axisymmetric instability of a viscous coaxial jet in a radial electric field. The outer liquid is considered to be a leaky dielectric and the inner a perfect dielectric. The generalized eigenvalue problem is solved and the growth rate of disturbance is obtained by using Chebyshev spectral collocation method. The effects of the radial electric field, liquid viscosity, surface tension as well as other parameters on the instability of the jet are investigated. The radial electric field is found to have a strong destabilizing effect on non-axisymmetric modes, especially those having smaller azimuthal wavenumbers. The helical mode becomes prevalent over other modes when the electric field is sufficiently large. Non-axisymmetric modes with high azimuthal wavenumbers may be the most unstable at zero wavenumber. Liquid viscosity has a strong stabilizing effect on both the axisymmetric and non-axisymmetric instability. Relatively, the helical instability is less suppressed and therefore becomes predominant at high liquid viscosity. Surface tension promotes the instability of the para-sinuous mode and meanwhile suppresses the helical and the other non-axisymmetric modes in long wavelength region.

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