scholarly journals Deformation modes of an oil-water interface under a local electric field: From Taylor cones to surface dimples

2021 ◽  
Vol 6 (12) ◽  
Author(s):  
Sebastian Dehe ◽  
Steffen Hardt
Keyword(s):  
Electric Field ◽  
Local Electric Field ◽  
Water Interface ◽  
Oil Water ◽  
Deformation Modes

Effect of electric-field-induced capillary attraction on the motion of particles at an oil–water interface

2007 ◽  
Vol 9 (48) ◽  
pp. 6371 ◽  
Author(s):  
Mariana P. Boneva ◽  
Nikolay C. Christov ◽  
Krassimir D. Danov ◽  
Peter A. Kralchevsky
Keyword(s):  
Electric Field ◽  
Water Interface ◽  
Oil Water ◽  
Capillary Attraction

A Reflective Display Technology Based on Electrofluidics

2014 ◽  
Vol 670-671 ◽  
pp. 976-981 ◽  
Author(s):  
Ming Zheng Duan ◽  
Robert A. Hayes ◽  
Xiao Zhang ◽  
Guo Fu Zhou
Keyword(s):  
Electric Field ◽  
External Electric Field ◽  
Hydrophobic Surface ◽  
Water Interface ◽  
Video Content ◽  
Display Technology ◽  
Oil Water ◽  
Optical Behavior ◽  
Reflective Display

In this paper we describe the design, driving and electro-optical behavior of an electrofluidic, or electrowetting, display panel. Electrofluidic displays involve the movement of a colored oil water interface as a result of polarizing the interface between water and a hydrophobic surface under the influence of external electric field. The proposed direct-segment drive approach successfully drives the display panel based on electrofluidic. The electro-optical behavior of electrofluidic display samples are measured and analyzed. The tonand toffof the pixel is 16 ms and 8 ms, respectively, which demonstrates that electrofluidic display panels have the capability to show video content.

scholarly journals INCREASING OIL RECOVERY APPLYING ELECTRIC STIMULATION ON THE FORMATION

2021 ◽  
Author(s):  
Bahshillo Akramov ◽  
◽  
Sherali Umedov ◽  
Odiljon Khaitov ◽  
Jaloliddin Nuriddinov ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Surface Tension ◽  
Electric Field ◽  
Electric Fields ◽  
Oil Recovery ◽  
Experimental Studies ◽  
Surface Tension Coefficient ◽  
Recovery Factor ◽  
Water Interface ◽  
Oil Water

The work is devoted to increasing the degree of depletion of reserves of longterm exploited hydrocarbon deposits on the basis of the obtained results of theoretical and experimental studies of the application of electrodynamic technologies for stimulating the formation and bottomhole formation zone. The electrolysis of formation fluids, water, oil-bearing rocks, is accompanied by a mass transfer, primary and secondary chemical reactions, the formation of all kinds of salts, alkalis and acids, new organic substances and all kinds of surfactants. Not only the liquid is subjected to electrolysis, but also the oil and gas bearing rocks themselves (solid electrolyte). The magnetic and electrical forces arising during the electric treatment of reservoirs make it possible to effectively drain heterogeneous reservoirs and extract residual oil from non-working layers. The work also carried out experiments to study the effect of the electric field on the surface tension coefficient at the oil-water interface. The circumstance of an abrupt change in the surface tension coefficient at the oil-water interface makes it possible in principle to create conditions in the reservoir that make it possible to slow down the cusping processes by applying an electric field of various magnitudes or, in other words, by regulating the amount of mass transfer. In numerical terms, the oil recovery factor without electrophysical treatment was 52.94%. Under electrophysical impact, the oil recovery factor was 94.12%, i.e. equaled to almost complete extraction of oil from the sample. In the field, this figure, of course, will decrease by 2-3 times, but it remains quite high in comparison with other methods of increasing oil recovery. Thus, the studies performed on samples in laboratory conditions indicate the possibility of using constant electric fields to increase oil recovery from depleted watered formations. Electrochemical treatment of the formation can significantly increase the displacement of oil from the formation. The increase in oil displacement reaches 15-20% and more. With the help of water alone, 58% of the oil (of its total volume in the sand) was displaced from the sand, and under electric field with a voltage of 10 V and 20 V, the total amount of displaced oil, respectively, increased to 67 and 83%. Thus, the laboratory studies performed on the samples also indicate the possibility of using constant electric fields to increase oil recovery from depleted watered formations. The carried out theoretical and experimental studies show the possibility of using the technology of electrochemical and electrothermochemical leaching of oilsaturated rocks to intensify oil production. The effectiveness of the recommended technology is especially noticeable in fields that have entered the final stage of development with a high water cut.

Enhancing and reversing the electric field at the oil–water interface with size-asymmetric monovalent ions

Soft Matter ◽  
2013 ◽  
Vol 9 (26) ◽  
pp. 6046 ◽  
Author(s):  
Guillermo Iván Guerrero-García ◽  
Yufei Jing ◽  
Mónica Olvera de la Cruz
Keyword(s):  
Electric Field ◽  
Water Interface ◽  
Monovalent Ions ◽  
Oil Water

Coalescence, Partial Coalescence, and Noncoalescence of an Aqueous Drop at an Oil–Water Interface under an Electric Field

Langmuir ◽  
2020 ◽  
Vol 36 (21) ◽  
pp. 6051-6060 ◽  
Author(s):  
Vikky Anand ◽  
Vinay A. Juvekar ◽  
Rochish M. Thaokar
Keyword(s):  
Electric Field ◽  
Water Interface ◽  
Partial Coalescence ◽  
Oil Water
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