Generalization of numerical simulation results on the electrical coalescence threshold for two conducting droplets based on non-dimensional parameters

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Generalization of numerical simulation results on the electrical coalescence threshold for two conducting droplets based on non-dimensional parameters. / Чирков, Владимир Александрович ; Костин, Петр Алексеевич.

в: Journal of Physics: Conference Series, Том 2701, 012075, 01.02.2024.

Результаты исследований: Научные публикации в периодических изданиях › статья в журнале по материалам конференции › Рецензирование

BibTeX

@article{d42b507f6bb44d3bbf8db47b8c8f61b3,

title = "Generalization of numerical simulation results on the electrical coalescence threshold for two conducting droplets based on non-dimensional parameters",

abstract = "Electrocoalescence, the physical process underlying the demulsification of a dielectric dispersion medium containing small conductive droplets (e.g., water), involves droplet merging at low electric fields and splashing at higher voltages. Understanding the physics of electrocoalescence is crucial for optimizing industrial electrocoalescers. However, mathematical modeling of these complex, multiphysics phenomena is challenging, and many published results are questionable. In this study, we utilized a previously developed reliable model for computing the threshold between electrical coalescence and non-coalescence. We investigate the applicability of dimensionless parameters, such as the Ohnesorge number and Weber electric number, to describe the coalescence threshold for uncharged droplets of equal size. Using COMSOL Multiphysics software, we analyze the dependency of the threshold electric field strength on water droplet radius and establish an equivalent dimensionless relationship. Our findings reveal that a universal Weber number quite accurately describes the threshold over a wide range of droplet radii, regardless of changes in liquid viscosity and inter-electrode gap. Direct mathematical simulations using up-to-date numerical models enable us to determine non-dimensional parameter values corresponding to the threshold electric field strength, providing generalizable results.",

author = "Чирков, {Владимир Александрович} and Костин, {Петр Алексеевич}",

year = "2024",

month = feb,

day = "1",

doi = "10.1088/1742-6596/2701/1/012075",

language = "English",

volume = "2701",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

publisher = "IOP Publishing Ltd.",

note = "null ; Conference date: 28-08-2023",

url = "https://www.icmsquare.net/",

}

RIS

TY - JOUR

T1 - Generalization of numerical simulation results on the electrical coalescence threshold for two conducting droplets based on non-dimensional parameters

AU - Чирков, Владимир Александрович

AU - Костин, Петр Алексеевич

N1 - Conference code: 12

PY - 2024/2/1

Y1 - 2024/2/1

N2 - Electrocoalescence, the physical process underlying the demulsification of a dielectric dispersion medium containing small conductive droplets (e.g., water), involves droplet merging at low electric fields and splashing at higher voltages. Understanding the physics of electrocoalescence is crucial for optimizing industrial electrocoalescers. However, mathematical modeling of these complex, multiphysics phenomena is challenging, and many published results are questionable. In this study, we utilized a previously developed reliable model for computing the threshold between electrical coalescence and non-coalescence. We investigate the applicability of dimensionless parameters, such as the Ohnesorge number and Weber electric number, to describe the coalescence threshold for uncharged droplets of equal size. Using COMSOL Multiphysics software, we analyze the dependency of the threshold electric field strength on water droplet radius and establish an equivalent dimensionless relationship. Our findings reveal that a universal Weber number quite accurately describes the threshold over a wide range of droplet radii, regardless of changes in liquid viscosity and inter-electrode gap. Direct mathematical simulations using up-to-date numerical models enable us to determine non-dimensional parameter values corresponding to the threshold electric field strength, providing generalizable results.

AB - Electrocoalescence, the physical process underlying the demulsification of a dielectric dispersion medium containing small conductive droplets (e.g., water), involves droplet merging at low electric fields and splashing at higher voltages. Understanding the physics of electrocoalescence is crucial for optimizing industrial electrocoalescers. However, mathematical modeling of these complex, multiphysics phenomena is challenging, and many published results are questionable. In this study, we utilized a previously developed reliable model for computing the threshold between electrical coalescence and non-coalescence. We investigate the applicability of dimensionless parameters, such as the Ohnesorge number and Weber electric number, to describe the coalescence threshold for uncharged droplets of equal size. Using COMSOL Multiphysics software, we analyze the dependency of the threshold electric field strength on water droplet radius and establish an equivalent dimensionless relationship. Our findings reveal that a universal Weber number quite accurately describes the threshold over a wide range of droplet radii, regardless of changes in liquid viscosity and inter-electrode gap. Direct mathematical simulations using up-to-date numerical models enable us to determine non-dimensional parameter values corresponding to the threshold electric field strength, providing generalizable results.

UR - https://www.mendeley.com/catalogue/90a3b3e0-e3f3-3377-ae5e-01c4a665e6ff/

U2 - 10.1088/1742-6596/2701/1/012075

DO - 10.1088/1742-6596/2701/1/012075

M3 - Conference article

VL - 2701

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

M1 - 012075

Y2 - 28 August 2023

ER -

ID: 117471721