The electrostatically forced Faraday instability: theory and experiments

Ward, Kevin; Matsumoto, Satoshi; Narayanan, Ranga

Type de document :

Article dans une revue scientifique: Article original

DOI :

10.1017/jfm.2018.940

Titre :

The electrostatically forced Faraday instability: theory and experiments

Auteur(s) :

Ward, Kevin [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Department of Chemical Engineering [Gainesville] [UF|CHE]
Matsumoto, Satoshi [Auteur]
Narayanan, Ranga [Auteur]
Department of Chemical Engineering [Gainesville] [UF|CHE]

Titre de la revue :

Journal of Fluid Mechanics

Pagination :

696-731

Éditeur :

Cambridge University Press (CUP)

Date de publication :

2019

ISSN :

0022-1120

Discipline(s) HAL :

Sciences de l'ingénieur [physics]

Résumé en anglais : [en]

The onset of interfacial instability in two-fluid systems using a viscous, leaky dielectric model is studied. The instability arises as a result of resonance between the parametric frequency of an imposed electric field ...
Lire la suite >The onset of interfacial instability in two-fluid systems using a viscous, leaky dielectric model is studied. The instability arises as a result of resonance between the parametric frequency of an imposed electric field and the system's natural frequency. In addition to a rigorous model that uses Floquet instability analysis, where both viscous and charge effects are considered, this study also provides convincing validating experiments. In other results, it is shown that (a) the imposition of a periodic electrostatic potential acts to counter gravity and this countering effect becomes more effective if a DC voltage is also added, (b) a critical DC voltage exists at which the interface becomes unstable such that no parametric frequency is required to completely destabilize the interface and (c) the leaky dielectric model approaches a model for a perfect dielectric/perfect conductor pair as the conductivity ratio becomes large. It is also shown via experiments that parametric resonant instability using electrostatic forcing may be reliably used to estimate interfacial tension to sufficient accuracy.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL

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