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Thermal and electrohydrodynamic plumes: a compartive study

 

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Author: Vázquez González, Pedro Ángel
Pérez Izquierdo, Alberto Tomás
Castellanos, A.
Department: Universidad de Sevilla. Departamento de Física Aplicada III
Universidad de Sevilla. Departamento de Electrónica y electromagnetismo
Date: 1996
Published in: Physics of Fluids, 8 (2091)
Document type: Article
Abstract: This paper deals with self similar thermal and electrohydrodynamic (EHD) plumes. The former arises from hot lines or points, whereas the latter arises when sharp metallic contours submerged in non conducting liquids support high electrostatic potential, resulting in charge injection. Although the motive force is buoyancy in one case and Coulomb force in the other, it is shown that the solution for EHD plumes is the same as for thermal plumes in the limit of large Prandtl numbers. We present the analysis of axisymmetric plumes for large values of Prandtl number, and this analysis is subsequently applied to EHD plumes. The validity of the approximations for EHD plumes is discussed in the light of experimental data.
Cite: Vázquez González, P.Á., Pérez Izquierdo, A.T. y Castellanos, A. (1996). Thermal and electrohydrodynamic plumes: a compartive study. Physics of Fluids, 8 (2091)
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URI: https://hdl.handle.net/11441/76487

DOI: 10.1063/1.868983

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