Electric field induced droplet deformation and breakup in confined shear flows

Singh, Rahul; Bahga, Supreet Singh; Gupta, Amit

doi:10.1103/physrevfluids.4.033701

Cited by 17 publications

(7 citation statements)

References 41 publications

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“…2 ) 1 ( + = (21) where fx is a curve function of the disturbed surface of the pendant drop given as [25] ( )…”

Section: Discussionmentioning

confidence: 99%

“…Am represents the maximum amplitude of the disturbance. λ denotes the wavelength of the disturbance Based on (21) and 22 Equation (25) indicates that P increases with increasing d. As a result, the instability of pendant drops is reduced, and then pendant drops are not easy to break up. In Section IV, before the breakup of the pendant drop, the neck of the pendant drop becomes larger with the increase in di and ui.…”

Section: Discussionmentioning

confidence: 99%

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Dynamic Deformation of Pendant Drops on the Edge of High-Voltage Bushing Sheds Under Extreme Rainfall

et al. 2020

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Flashover accidents on high-voltage bushings frequently occur under extreme rainfall, which is generally attributed to the bridging of adjacent sheds by pendant drops, a result of the dynamic deformation of pendant drops. We numerically investigate the effects of the parameters of pendant drops and the electric field on the dynamic deformation of pendant drops on a 500 kV transformer bushing under extreme rainfall and verify the simulation results by artificial rain experiment. The dynamic deformation of pendant drops is described by solving the Navier-Stokes equations and using the level set method. The results show that the maximum length of the pendant drop increases with the increase in the initial diameter and the initial mass flow rate, respectively, but decreases under the electric field. The main influencing factor on the maximum length of the pendant drop alters with the variation of the initial diameter and the initial mass flow rate in the absence of the electric field, whereas the initial mass flow rate is the unique main influencing factor in the presence of the electric field. Furthermore, the variations of the maximum length and breakup time of the pendant drop are elucidated by the instability of the pendant drop.

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“…2 ) 1 ( + = (21) where fx is a curve function of the disturbed surface of the pendant drop given as [25] ( )…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Dynamic Deformation of Pendant Drops on the Edge of High-Voltage Bushing Sheds Under Extreme Rainfall

et al. 2020

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“…A brief background of the method is given in appendix A and the details can be obtained from previous publications (Singh et al. 2019 a , b ).…”

Section: Resultsmentioning

confidence: 99%

“…Experiments are supplemented with three-dimensional numerical simulations to obtain a mechanistic understanding of electrohydrodynamics in the droplet generation process. The numerical simulations are carried out by using a coupled leaky-dielectric and multicomponent lattice Boltzmann model (Singh, Bahga & Gupta 2019 a , b ).…”

Section: Introductionmentioning

confidence: 99%

Electrohydrodynamic droplet formation in a T-junction microfluidic device

2020

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“…They found that larger droplets move more slowly in the channel compared to smaller droplets, but the lateral migration phenomenon is better exhibited by the larger droplets. A lattice Boltzmann (LB) method is used by Singh et al (2019aSingh et al ( , 2019b to investigate the deformation and breakup of a droplet subjected to shear flow in the presence of electric field. Results show that the relative strength of the conductivity ratio to the permittivity ratio affects the orientation angle and breakup model.…”

Section: Introductionmentioning

confidence: 99%

The deformation and breakup of a droplet under the combined influence of electric field and shear flow

Chen

Liang

2021

Fluid Dyn. Res.

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A lattice Boltzmann and finite-difference hybrid method is used to simulate the droplet deformation and breakup under the combined action of shear flow and electric field. The hybrid method is first used to validate for the droplet deformation in the combined action of shear flow and electric field. It is then used to simulate the droplet deformation and breakup in two different electric systems. Results of prolate droplets show that the droplet height and deformation both increase with increasing electric capillary number ( C a E ). In addition, for the breakup mode of prolate droplets, increasing C a E makes the long axis of the droplet incline more towards the wall electrodes and droplet breaks up into more daughter droplets. Results of oblate droplets show that the droplet height decreases with increasing C a E . However, the droplet deformation first decreases and then increases with increasing C a E , and its minima occurs at C a E = 0.01 . For the breakup mode of oblate droplets, the droplet deforms into a more oblate shape with a longer neck and finally breakup into more daughter droplets with increasing C a E .

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Electric field induced droplet deformation and breakup in confined shear flows

Cited by 17 publications

References 41 publications

Dynamic Deformation of Pendant Drops on the Edge of High-Voltage Bushing Sheds Under Extreme Rainfall

Dynamic Deformation of Pendant Drops on the Edge of High-Voltage Bushing Sheds Under Extreme Rainfall

Electrohydrodynamic droplet formation in a T-junction microfluidic device

The deformation and breakup of a droplet under the combined influence of electric field and shear flow

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