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Complex flow patterns at the onset of annular electroconvection in a dielectric liquid subjected to an arbitrary unipolar injection

 

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Opened Access Complex flow patterns at the onset of annular electroconvection in a dielectric liquid subjected to an arbitrary unipolar injection
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Author: Wu, Jiam
Pérez Izquierdo, Alberto Tomás
Traoré, Philippe
Vázquez González, Pedro Ángel
Department: Universidad de Sevilla. Departamento de Física Aplicada III
Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo
Date: 2015
Published in: IEEE Transactions on Dielectrics and Electrical Insulation, 22 (5), 2637-2645.
Document type: Article
Abstract: We numerically investigated the annular electroconvection that takes place in a dielectric liquid lying between two concentric cylinder electrodes. A uniform injection of arbitrary strengths either from the inner or outer cylinder introduces free charge carriers into the system, and the resulting Coulomb force induces electroconvection. The problem is characterized by a linear instability that corresponds to the onset of flow motion. The linear stability criteria were determined from direct numerical results and by linear stability analysis, and the results obtained with the two approaches show an excellent agreement. We focused on the fully developed flow pattern in the finite amplitude regime. We observed very different flow motions that were highly dependent on the injection strength.
Cite: Wu, J., Pérez Izquierdo, A.T., Traoré, P. y Vázquez González, P.Á. (2015). Complex flow patterns at the onset of annular electroconvection in a dielectric liquid subjected to an arbitrary unipolar injection. IEEE Transactions on Dielectrics and Electrical Insulation, 22 (5), 2637-2645.
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URI: https://hdl.handle.net/11441/77072

DOI: 10.1109/TDEI.2015.005157

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