scholarly journals Effect of external electrical field on the magnetohydrodynamic fluid flow of viscous in a slot between fixed surfaces of revolution

2017 ◽  
Author(s):  
Jerzy Sawicki ◽  
Maciej Gularowski
Keyword(s):  
Fluid Flow ◽  
Surfaces Of Revolution ◽  
Electrical Field ◽  
External Electrical Field ◽  
Magnetohydrodynamic Fluid

SECOND-GRADE MAGNETOHYDRODYNAMIC FLUID FLOW IN POROUS MEDIA

2010 ◽  
Vol 13 (11) ◽  
pp. 1033-1037
Author(s):  
Muhammad R. Mohyuddin ◽  
S. Islam ◽  
A. Hussain ◽  
A. M. Siddiqui
Keyword(s):  
Porous Media ◽  
Fluid Flow ◽  
Flow In Porous Media ◽  
Second Grade ◽  
Magnetohydrodynamic Fluid

On-demand Electrohydrodynamic Jetting of an Ethylene Glycol and Water Mixture—System of Controlled Picoliter Fluid Deposition

2021 ◽  
Author(s):  
J. F. Dijksman ◽  
U. Stachewicz
Keyword(s):  
Fluid Flow ◽  
Power Amplifier ◽  
Large Diameter ◽  
Electrical Circuit ◽  
Viscous Drag ◽  
Water Mixture ◽  
Electrical Field ◽  
On Demand ◽  
Flat Substrate ◽  
Set Up

On-demand electrohydrodynamic jetting also called electrohydrodynamic atomization (EHDA) is a method to jet small amounts of fluid out of a nozzle with a relatively large diameter by switching on and off an electrical field between the nozzle and the substrate. The total amount of volume deposited is up to 5 pL. The set-up consists of a vertically placed glass pipette with a small nozzle directed downward and a flat substrate placed close to the end of the nozzle. Inside the pipette, an electrode is mounted close to the entrance of the nozzle. The electrode is connected to a high voltage power amplifier. Upon switching on the electrical field, the apparent surface tension drops, the meniscus deforms into a cone and fluid starts to flow toward the nozzle deforming the meniscus. At a certain moment the cone reaches the Taylor cone dimensions and from its tip a jet emerges that decomposes into a stream of charged fL droplets that fly toward the substrate. This process stops when the pulse is switched off. After switching off, the meniscus returns slowly to its equilibrium position. The process is controlled by different time constants, such as the slew rate of the power amplifier and the RC time of the electrical circuit composed of the electrical resistance in the fluid contained in the nozzle between the electrode and the meniscus, and the capacitance of the gap between the meniscus and the flat substrate. Another time constant deals with the fluid flow during the growth of the meniscus, directly after switching on the pulse. This fluid flow is driven by hydrostatic pressure and opposed by a viscous drag in the nozzle. The final fluid flow during droplet formation is governed by the balance between the drag of the charge carriers inside the fluid, caused by the current associated with the charged droplets leaving the meniscus and the viscous drag. These different phenomena will be discussed theoretically and compared to experimental results.

Investigations of Redox Magnetohydrodynamic Fluid Flow At Microelectrode Arrays Using Microbeads

2010 ◽  
Vol 82 (7) ◽  
pp. 2643-2651 ◽  
Author(s):  
Emily C. Anderson ◽  
Melissa C. Weston ◽  
Ingrid Fritsch
Keyword(s):  
Fluid Flow ◽  
Microelectrode Arrays ◽  
Magnetohydrodynamic Fluid

Tunable optoelectronic properties in h-BP/h-BAs bilayers: The effect of an external electrical field

2019 ◽  
Vol 493 ◽  
pp. 308-319 ◽  
Author(s):  
Saif Ullah ◽  
Pablo A. Denis ◽  
Marcos G. Menezes ◽  
Fernando Sato
Keyword(s):  
Optoelectronic Properties ◽  
Electrical Field ◽  
External Electrical Field
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