Electrostatic Drop Formation in Liquid/Liquid Systems

Gneist, G.; Bart, Hans‐Jörg

doi:10.1002/1521-4125(20020910)25:9<899::aid-ceat899>3.0.co;2-y

Cited by 11 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The coefficient of determination for the proposed correlations in Eqs. (21) and (22) was calculated to be 0.99 and 0.98, respectively. According to the studied domain of the parame-ters and phase properties, the validity ranges of the developed correlation are limited to the following conditions: 6 × 10 -4 < We E < 6 × 10 -3 ; 0.04 < Oh < 0.12; 1 ≤…”

Section: Electrocoalescence Kinetic Correlationmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Study of the Collision and Coalescence of Water Droplets in an Electric Field

Mohammadi

Shahhosseini

Bayat³

2013

Chem Eng & Technol

View full text Add to dashboard Cite

The coalescence of binary water droplets in oil exposed to an external electric field is simulated using a model including both electrostatic and hydrodynamic sections. Available mathematical models for electric dipole-dipole force are presented in the first part of the model. Volume of Fluid approach is applied in the second part of the model. The simulation results were in good agreement with the published experimental observations. The results indicated that an improvement in electrocoalescence speed could be achieved. It was also revealed that the skew angle of the electric field, the oil viscosity, and the initial drops distance influence the electrocoalescence. Moreover, a correlation was developed to predict electrocoalescence kinetic as a function of the participant parameters.

show abstract

Section: Electrocoalescence Kinetic Correlationmentioning

confidence: 99%

“…Simon and Bart [19] investigated the coalescence of drops caused by the random movement, experimentally. Gneist and Bart [20,21] have studied electrostatic drop formation in liquid/liquid systems, using high frequency AC fields.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Collision and Coalescence of Water Droplets in an Electric Field

Mohammadi

Shahhosseini

Bayat³

2013

Chem Eng & Technol

View full text Add to dashboard Cite

show abstract

“…Several authors have applied electrosdispersion techniques, or variation of them, to produce water-in-oil emulsions, to disperse a gas into conductive liquids, or to disperse a dielectric liquid into a conductive medium . Alternatives have been presented to increase the efficiency of the technique, which include application of more intense electric fields, use of negative electrical potential, or use of high-frequency ac power sources . Note that in most of the mentioned examples the droplet dispersion occurs within the so-called dripping regime .…”

Section: Introductionmentioning

confidence: 99%

Effect of a Surrounding Liquid Environment on the Electrical Disruption of Pendant Droplets

et al. 2016

View full text Add to dashboard Cite

The effect of a surrounding, dielectric, liquid environment on the dynamics of a suddenly electrified liquid drop is investigated both numerically and experimentally. The onset of stability of the droplet is naturally dictated by a threshold value of the applied electric field. While below that threshold the droplet retains its integrity, reaching to a new equilibrium state through damped oscillations (subcritical regime), above it electrical disruption takes place (supercritical regime). In contrast to the oscillation regime, the dynamics of the electric droplet disruption in the supercritical regime reveals a variety of modes. Depending on the operating parameters and fluid properties, a drop in the supercritical regime may result in the well-known tip streaming mode (with and without whipping instability), in droplet splitting (splitting mode), or in the development of a steep shoulder at the elongating front of the droplet that expands radially in a sort of "splashing" (splashing mode). In both splitting and splashing modes, the sizes of the progeny droplets, generated after the breakup of the mother droplet, are comparable to that of the mother droplet. Furthermore, the development in the emission process of the shoulder leading to the splashing mode is described as a parametrical bifurcation, and the parameter governing that bifurcation has been identified. Physical analysis confirms the unexpected experimental finding that the viscosity of the dynamically active environment is absent in the governing parameter. However, the appearance of the splitting mode is determined by the viscosity of the outer environment, when that viscosity overcomes a certain large value. These facts point to the highly nonlinear character of the drop fission process as a function of the droplet volume, inner and outer liquid viscosities, and applied electric field. These observations may have direct implications in systems where precise control of the droplet size is critical, such as in analytical chemistry and "drop-on-demand" processes driven by electric fields.

show abstract

“…Comparing (7) to (12) and (8) to (13) and noting (11), it is evident that in the case of an insulating wall and dielectricelectrolyte interface, a particular solution to the electrostatic and mass transport problem contains a uniform concentration field C ¼ C 1 that is independent of position. For this solution, the solute flux balance (7) collapses into the Laplace equation (10) and the current flux density is due entirely to electromigration,…”

Section: Theoretical Modelmentioning

confidence: 99%

“…Application of potential difference across the interface of two immiscible liquids containing a surfactant/salt results in a strong electrosorption of charged molecules onto the oil/liquid interface. 10 This increases repulsive interaction between the adsorbed molecules, which are oriented normally to the interface by the hydrophilic/ hydrophobic interaction and applied electric field. 11 Polarization of the interface in a system of two immiscible fluids in the presence of ions has been reviewed by Shchipunov and Kolpakov.…”

Section: Introductionmentioning

confidence: 99%

Formation of Oil/Water Emulsions due to Electrochemical Instability at the Liquid/Liquid Interface

Takhistov

Stolzmann

2006

Food Biophysics

View full text Add to dashboard Cite

This study is dedicated to the development of manufacturing principles of food emulsions for food functionalization and formulation. In the experiments presented, the emulsions are generated using the effects of electrochemical instability and surface tension decrease at a polarized liquid/liquid interface. Polarization of the oil/liquid interface is studied in various aqueous systems including electrolytes and water-based solutions of cationic, anionic, zwitterionic, and nonionic surfactants. The physical features of the obtained emulsions, such as hydrodynamic flow patterns, droplet size distribution, and emulsion organization, are described. The efficacy of different electrode configurations is also evaluated. The theoretical model of the liquid/liquid interface polarization and experimental data obtained from various emulsification regimes are presented.

show abstract

Electrostatic Drop Formation in Liquid/Liquid Systems

Cited by 11 publications

References 6 publications

Numerical Study of the Collision and Coalescence of Water Droplets in an Electric Field

Numerical Study of the Collision and Coalescence of Water Droplets in an Electric Field

Effect of a Surrounding Liquid Environment on the Electrical Disruption of Pendant Droplets

Formation of Oil/Water Emulsions due to Electrochemical Instability at the Liquid/Liquid Interface

Contact Info

Product

Resources

About