Journal Article

Electrohydrodynamic linear stability analysis of dielectric liquids subjected to unipolar injection in a rectangular enclosure with rigid sidewalls

Vázquez, P. A., Wu, Jian, Pérez, A. T., Traoré, P.

2014

Overview

We investigate the linear stability threshold of a dielectric liquid subjected to unipolar injection in a two-dimensional rectangular enclosure with rigid boundaries. A finite element formulation transforms the set of linear partial differential equations that governs the system into a set of algebraic equations. The resulting system poses an eigenvalue problem. We calculate the linear stability threshold, as well as the velocity field and charge density distribution, as a function of the aspect ratio of the domain. The stability parameter as a function of the aspect ratio describes paths of symmetry-breaking bifurcation. The symmetry properties of the different linear modes determine whether these paths cross each other or not. The resulting structure has important consequences in the nonlinear behaviour of the system after the bifurcation points.

• Publisher: Cambridge University Press,Cambridge University Press (CUP)
• Subject: Aspect ratio / Bifurcations / Boundary element method / Broken symmetry / Charge density / Charge distribution / Density distribution / Differential equations / Electrohydrodynamics / Enclosures / Engineering Sciences / Exact sciences and technology / Finite element method / Fluid dynamics / Fundamental areas of phenomenology (including applications) / Hydrodynamic stability / Injection / Liquids / Magnetohydrodynamics and electrohydrodynamics / Mathematical analysis / Mathematical models / Nonlinearity (including bifurcation theory) / Partial differential equations / Physics / Stability / Stability analysis / Transformations (mathematics) / Velocity / Velocity distribution