Artículo
Onset of convection in a finite two-dimensional container due to unipolar injection of ions
Autor/es | Wu, Jiam
Traoré, Philippe Vázquez González, Pedro Ángel Pérez Izquierdo, Alberto Tomás |
Departamento | Universidad de Sevilla. Departamento de Física Aplicada III Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo |
Fecha de publicación | 2013 |
Fecha de depósito | 2018-07-03 |
Publicado en |
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Resumen | This work addresses the stability of a two-dimensional plane layer of a dielectric liquid enclosed in wall
bounded cavities of different aspect ratios and subjected to unipolar injection of ions. Numerical simulations
have ... This work addresses the stability of a two-dimensional plane layer of a dielectric liquid enclosed in wall bounded cavities of different aspect ratios and subjected to unipolar injection of ions. Numerical simulations have been conducted to investigate the effect of lateralwalls, especially in the development of the electroconvective instability. It is found that an unexpected change of the bifurcation nature occurs for certain cavity aspect ratios. We showthat above the linear stability threshold for the rest state a supercritical bifurcation arises. This bifurcation takes place at a given value Tc1 of the parameter T (the electric Rayleigh number). Then, a second subcritical bifurcation occurs at a second threshold Tc2, featuring a typical hysteresis loop with an associated nonlinear criterion Tf , which is very characteristic of the Coulomb-driven convection. This behavior has been confirmed by different numerical codes based on different numerical methods. The physical mechanism which leads to this situation is analyzed and discussed. The evolution of the bifurcation diagrams with the aspect ratio of the cavity is also provided and analyzed. |
Identificador del proyecto | FIS2011-25161
P10-FQM-5735 P09-FQM-4584 |
Cita | Wu, J., Traoré, P., Vázquez González, P.Á. y Pérez Izquierdo, A.T. (2013). Onset of convection in a finite two-dimensional container due to unipolar injection of ions. Physical Review E, 88 (5), 053018-1-053018-9. |
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2013_PhysicalReviewE.pdf | 3.664Mb | [PDF] | Ver/ | |