Effect of the mobility parameter on the oscillatory electro-convection of dielectric liquids subject to strong unipolar charge injection

• Published in: 2013 IEEE Industry Applications Society Annual Meeting pp. 1 - 7
• Main Authors: Jian Wu, Traore, Philippe, Louste, Christophe, Dascalescu, Lucian, Fang-Bao Tian, Perez, Alberto
• Format: Conference Proceeding Journal Article
• Language: English
• Published: IEEE 01.01.2013; Institute of Electrical and Electronics Engineers
• Subjects: Dielectric liquids; Electrohydrodynamics; Engineering Sciences; Equations; Isothermal processes; Mathematical model; non-dimensional mobility number; Numerical simulation; oscillatory convection; Physics; unipolar injection; unipolar injection; non-dimensional mobility number; oscillatory convection; Electrohydrodynamics; numerical simulation
• ISSN: 0197-2618; 0093-9994; 1939-9367
• DOI: 10.1109/IAS.2013.6682450

Two-dimensional numerical calculations were carried out for the isothermal electro-convection in a dielectric liquid induced by the unipolar charge injection. In the dimensionless form, the system is mainly governed by the injection strength number (C), the electric Rayleigh number (T) and a mobility number (M). A strong injection case with C = 10 was considered. Along with the increase of the driving parameter T, oscillatory electro-convection occurs. Critical values of T corresponding to the onset of such oscillatory convection were shown to be highly dependent on M, and were accurately determined. Some precautions including the algorithm for the charge density equation were taken to reduce the numerical diffusion and to ensure the reliability of our findings.