TY - GEN

T1 - Ion Injection in Dielectric Liquids from the Surface of Aqueous Solutions

AU - Vasilkov, Sergei

AU - Balymbetov, Arman

N1 - Publisher Copyright: © 2022 IEEE.

PY - 2022/5/29

Y1 - 2022/5/29

N2 - One can manipulate two-phase fluids using an electric field if one of the phases is dielectric. For the sake of better understanding and improvement in computer models, one needs to understand what should be accounted for and what can be disregarded. It is well-documented that the electric field created with metal electrodes can cause a dielectric liquid to charge and electrohydrodynamic (EHD) flows to appear but little is known whether the charging and the flows take place when there is a second liquid phase that is more conducting and thus is playing a role of an electrode. To address this issue, charge injection from water electrodes into silicone oil is studied-the dynamical current-voltage characteristics are measured in the water meniscus vs copper plane electrode system. The water electrodes are made of agar jelly with the addition of sodium chloride or sodium dodecyl sulfate (anionic surfactant). It has been found that there is a low-voltage section of DCVCs where the current does not exceed 1 nA and a high-voltage section with currents reaching 100 nA. However, the stepping and variability of the oscillograms in the latter section indicates a more complex injection mechanism rather than that observed for metal electrodes. The data allows rough estimates to be made for real two-phase systems, but further research and data collection are necessary.

AB - One can manipulate two-phase fluids using an electric field if one of the phases is dielectric. For the sake of better understanding and improvement in computer models, one needs to understand what should be accounted for and what can be disregarded. It is well-documented that the electric field created with metal electrodes can cause a dielectric liquid to charge and electrohydrodynamic (EHD) flows to appear but little is known whether the charging and the flows take place when there is a second liquid phase that is more conducting and thus is playing a role of an electrode. To address this issue, charge injection from water electrodes into silicone oil is studied-the dynamical current-voltage characteristics are measured in the water meniscus vs copper plane electrode system. The water electrodes are made of agar jelly with the addition of sodium chloride or sodium dodecyl sulfate (anionic surfactant). It has been found that there is a low-voltage section of DCVCs where the current does not exceed 1 nA and a high-voltage section with currents reaching 100 nA. However, the stepping and variability of the oscillograms in the latter section indicates a more complex injection mechanism rather than that observed for metal electrodes. The data allows rough estimates to be made for real two-phase systems, but further research and data collection are necessary.

KW - charge injection

KW - current-voltage characteristics

KW - liquid dielectrics

KW - two-phase liquids

KW - water electrode

UR - http://www.scopus.com/inward/record.url?scp=85135872179&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/9a5c4dbc-4362-37d2-b5e3-9b6cb2a2b3af/

U2 - 10.1109/icdl49583.2022.9830975

DO - 10.1109/icdl49583.2022.9830975

M3 - Conference contribution

AN - SCOPUS:85135872179

T3 - Proceedings - IEEE International Conference on Dielectric Liquids

BT - 2022 IEEE 21st International Conference on Dielectric Liquids, ICDL 2022

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 21st IEEE International Conference on Dielectric Liquids, ICDL 2022

Y2 - 29 May 2022 through 2 June 2022

ER -