Critical Modes of Thermoelectric Convection Instabilities in a Vertical Slot

被引：3
作者：
Barry, Elhadj B. [1 ]
Yoshikawa, Harunori N. [2 ]
Fogaing, Mireille Tadie [1 ]
Kang, Changwoo [1 ,3 ]
Mutabazi, Innocent [1 ]
机构：
[1] Normandie Univ, UNIHAVRE, Lab Ondes & Milieux Complexes LOMC, CNRS,UMR 6294, 53 Rue Prony, F-76058 Le Havre, France
[2] Univ Cote dAzur, Inst Phys Nice, CNRS, F-06100 Nice, France
[3] Jeonbuk Natl Univ, Dept Mech Engn, 567 Baekje Daero, Jeonju Si 54896, Jeollabuk Do, South Korea
来源：
MICROGRAVITY SCIENCE AND TECHNOLOGY | 2021年 / 33卷 / 01期
关键词：
Vertical slot; Dielectric liquid; Dielectrophoretic force; Thermoelectric convection;
D O I：
10.1007/s12217-020-09856-2
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
Investigation of the natural convection in a dielectric fluid confined inside a vertical slot subject to a constant horizontal temperature gradient and a high-frequency electric field was revisited. The thermoelectric coupling produces a dielectrophoretic force which contains a term called electric buoyancy associated with an electric gravity. Similar to the Archimedean buoyancy, this force can induce thermo-electro-convective instability in a stable fluid flow. Including the feedback effect of the electric field on the flow, a three-dimensional linear stability analysis is performed to characterize the instability induced by this force. Different critical modes are found depending on the intensity of the electric field: stationary hydrodynamic modes, oscillatory thermal modes and stationary electric modes. The threshold of the electric modes is independent of the Prandtl number in contrast with the threshold of the hydrodynamic and thermal modes. The obtained results are compared with those of previous studies.
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页数：10
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