Electro-Hydro-Dynamic plumes due to autonomous and non autonomous charge injection by a sharp blade electrode in a dielectric liquid

2013 ◽  
Author(s):  
Philippe Traore ◽  
Jian Wu ◽  
Christophe Louste ◽  
Quentin Pelletier ◽  
Lucian Dascalescu
Keyword(s):  
Charge Injection ◽  
Dielectric Liquid

scholarly journals Tunable-Focus Liquid Lens through Charge Injection

Micromachines ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 109 ◽  
Author(s):  
Shizhi Qian ◽  
Wenxiang Shi ◽  
Huai Zheng ◽  
Zhaohui Liu
Keyword(s):  
Corona Discharge ◽  
Charge Injection ◽  
Dielectric Liquid ◽  
Liquid Lenses ◽  
Liquid Lens ◽  
3D Printed ◽  
Tube Structure

Liquid lenses are the simplest and cheapest optical lenses, and various studies have been conducted to develop tunable-focus liquid lenses. In this study, a simple and easily implemented method for achieving tunable-focus liquid lenses was proposed and experimentally validated. In this method, charges induced by a corona discharge in the air were injected into dielectric liquid, resulting in “electropressure” at the interface between the air and the liquid. Through a 3D-printed U-tube structure, a tunable-focus liquid lens was fabricated and tested. Depending on the voltage, the focus of the liquid lens can be adjusted in large ranges (−∞ to −9 mm and 13.11 mm to ∞). The results will inspire various new liquid-lens applications.

Charge injection with multiple blade-plane configurations in a quiescent dielectric liquid

2010 ◽  
Vol 17 (6) ◽  
pp. 1846-1852 ◽  
Author(s):  
E.L. Ergene ◽  
G. Malkawi ◽  
F. Mashayek ◽  
J.S. Shrimpton
Keyword(s):  
Charge Injection ◽  
Dielectric Liquid

scholarly journals Coulomb-driven flow of a dielectric liquid subject to charge injection by a sharp electrode

1999 ◽  
Vol 11 (8) ◽  
pp. 2434-2436 ◽  
Author(s):  
F. J. Higuera ◽  
P. A. Vázquez
Keyword(s):  
Charge Injection ◽  
Dielectric Liquid

Electrohydrodynamic Plumes due to Autonomous and Nonautonomous Charge Injection by a Sharp Blade Electrode in a Dielectric Liquid

2015 ◽  
Vol 51 (3) ◽  
pp. 2504-2512 ◽  
Author(s):  
Philippe Traore ◽  
Jian Wu ◽  
Christopher Louste ◽  
Quentin Pelletier ◽  
Lucian Dascalescu
Keyword(s):  
Charge Injection ◽  
Dielectric Liquid

Conductivity Models of Electrothermal Convection in a Plane Layer of Dielectric Liquid

1984 ◽  
Vol 106 (1) ◽  
pp. 131-136 ◽  
Author(s):  
P. J. Martin ◽  
A. T. Richardson
Keyword(s):  
Charge Injection ◽  
Plane Layer ◽  
Dielectric Liquid ◽  
Linear Quadratic ◽  
Conductivity Model ◽  
Conductivity Variation ◽  
Injection Model ◽  
Energy Argument ◽  
Oscillatory Instabilities ◽  
Conductivity Models

Experiments have demonstrated that a d-c voltage applied across a thermally stabilized plane layer of dielectric liquid can induce both stationary and oscillatory instabilities and thereby significantly augment heat transfer. While a unipolar charge injection model can explain both types of instability, the predictions of a conductivity model depend crucially upon the way the electrical conductivity varies with temperature. Here a conductivity model is derived from a dissociation and recombination model in an Ohmic limit, and its linear instabilities for linear, quadratic, and Arrhenius-type conductivity variations are investigated numerically. Oscillatory instability is usually predicted and an energy argument rules out stationary instability for the type of conductivity variation observed experimentally. This casts doubts on the experimental relevance of earlier quadratic conductivity models predicting stationary instability. The relative merits of conductivity and charge injection models are discussed in the light of empirical evidence.

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