Ice nucleation of AgI — CuBr nucleants in the presence of electric field

Sivanesan, S.; Gobinathan, R.

doi:10.1016/0254-0584(91)90135-h

“…From the surface charge density they have used, it is evident that the effective external field is about 4 V/Å, which is nearly 80 times higher than the effective field (since the relative permittivity of water, ϵ r ≈ 80). The electrofreezing phenomenon in subcooled water has been widely reported in experimental studies. − However, the room temperature electrofreezing has not been experimentally detected due to different constraints in achieving extreme electric fields. Experiments are yet to validate the high ordering and crystallization of water molecules under intense electric fields at room temperature observed in MD simulations.…”

Section: Resultsmentioning

confidence: 99%

Effects of Electrostatic Interactions on Kapitza Resistance in Hexagonal Boron Nitride–Water Interfaces

Alosious

¹

,

Kannam

²

,

Sathian

³

et al. 2022

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Electrostatic interactions in nanoscale systems can influence the heat transfer mechanism and interfacial properties. This study uses molecular dynamics simulations to investigate the impact of various electrostatic interactions on the Kapitza resistance (R k ) on a hexagonal boron nitride–water system. The Kapitza resistance at hexagonal boron nitride nanotube (hBNNT)–water interface reduces with an increase in diameter of the nanotube due to more aggregation of water molecules per unit surface area. An increase in the partial charges on boron and nitride caused the reduction in R k . With the increase in partial charge, a better hydrogen bonding between hBNNT and water was observed, whereas the structure and order of the water molecules remain the same. Nevertheless, the addition of NaCl salt into water does not have any influence on interfacial thermal transport. R k remains unchanged with electrolyte concentration because the cumulative Coulombic interaction between the ions and the hBNNT is significantly less when compared with water molecules. Furthermore, the effect of electric field strength on interfacial heat transfer is also investigated by providing uniform positive and negative surface charges on the outermost hBN layers. R k is nearly independent of the practical range of applied electric fields and decreases with an increasing electric field for extreme field strengths until the electrofreezing phenomenon occurs. The ordering of water molecules toward the charged surface leads to an increase in the layering effect, causing the reduction in R k in the presence of an electric field.

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“…The electro-freezing phenomenon in subcooled water has been widely reported in experimental studies. [76][77][78][79] However, the room temperature electro-freezing has not been experimentally detected due to different constraints in achieving extreme electric fields. Experiments are yet to validate the high ordering and crystallization of water molecules under intense electric fields at room temperature observed in MD simulations.…”

Section: Resultsmentioning

confidence: 99%

Effects of electrostatic interactions on Kapitza resistance in hexagonal boron nitride-water interfaces

Alosious,

Kannam,

Sathian

et al. 2022

Preprint

0

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Electrostatic interactions in nanoscale systems can influence the heat transfer mechanism and interfacial properties. This study uses molecular dynamics simulations to investigate the impact of various electrostatic interactions on the Kapitza resistance (R k ) on a hexagonal boron nitride-water system. The Kapitza resistance at hexagonal boron nitride nanotube (hBNNT)-water interface reduces with an increase in diameter of the nanotube due to more aggregation of water molecules per unit surface area.An increase in the partial charges on boron and nitride caused the reduction in R k .With the increase in partial charge, a better hydrogen bonding between hBNNT and water was observed, whereas the structure and order of the water molecules remain the same. Nevertheless, the addition of NaCl salt into water does not have any influence on interfacial thermal transport. R k remains unchanged with electrolyte concentration since the cumulative Coulombic interaction between the ions, and the hBNNT is

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“…The effect of electric field on ice nucleation in the presence of nucleants (AgI-CuBr) system showed that production and collapse of bubbles could be enhanced ice nucleation temperature. (Sivanesan and Gobinathan, 1991).…”

Section: No Specimen Condition Results Referencementioning

confidence: 99%

“…Since these charges attract water molecules, the layer of water in contact with the electrode will be oriented due to polarity of the water molecule. This orientation of molecules of water near the electrode enhances the possibility of ice nucleation (Sivanesan and Gobinathan, 1991). Furthermore, the effect of electrode material has an importance on the nucleation process.…”

Section: Charged Surface or Charge Flow-type Nucleationmentioning

confidence: 99%

Review on the control of ice nucleation by ultrasound waves, electric and magnetic fields

Dalvi‐Isfahan

¹

,

Hamdami

²

,

Xanthakis³

et al. 2017

Journal of Food Engineering

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International audienceFreezing is the most popular and widely used food preservation method of the modern times. The freezing process of food matrices is related to their high water content and its metamorphoses into ice on cooling. The final quality of the frozen product is highly depended on the ice crystal morphology because it can cause irreversible damage on the microstructure of the food matrix. Supercooling and ice nucle-ation temperature need to be controlled both in suppressing and inducing the solidification to improve technological processes such as freeze drying, freeze concentration, cryopreservation, ice formation and cold-energy storage both in food industry and domestic preservation. However, the mechanism of freezing is not yet well known and it is affected by several factors. Several emerging technologies have been recently proposed for ice nucleation control during freezing. This review article is focused on the alternative freezing methods such as ultrasound waves, magnetic, electric, and electromagnetic field assisted freezing. In addition, the properties, mechanism of action and possible applications of electrofreezing are extensively discussed

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Ice nucleation of AgI — CuBr nucleants in the presence of electric field

Cited by 10 publications

References 12 publications

Effects of Electrostatic Interactions on Kapitza Resistance in Hexagonal Boron Nitride–Water Interfaces

Effects of Electrostatic Interactions on Kapitza Resistance in Hexagonal Boron Nitride–Water Interfaces

Effects of electrostatic interactions on Kapitza resistance in hexagonal boron nitride-water interfaces

Review on the control of ice nucleation by ultrasound waves, electric and magnetic fields

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