Free Surface Flows in Electrohydrodynamics with a Constant Vorticity Distribution

Matthew J Hunt (1, 1, 2) , Denys Dutykh (3, 4, 5)

1 University of Warwick [Coventry]
2 WMI - Warwick Mathematics Institute
3 LAMA - Laboratoire de Mathématiques
4 INSMI-CNRS - Institut National des Sciences Mathématiques et de leurs Interactions - CNRS Mathématiques
5 USMB [Université de Savoie] [Université de Chambéry] - Université Savoie Mont Blanc

In 1895, Korteweg and de Vries (KdV), derived their celebrated equation describing the motion of waves of long wavelength in shallow water. In doing so they made a number of quite reasonable assumptions, incompressibility of the water and irrotational fluid. The resulting equation, the celebrated KdV equation, has been shown to be a very reasonable description of real water waves. However there are other phenomena which have an impact on the shape of the wave, that of vorticity and viscosity. This paper examines how a constant vorticity affects the shape of waves in electrohydrodynamics. For constant vorticity, the vertical component of the velocity obeys a Laplace equation and also has the usual lower boundary condition. In making the vertical component of the velocity take central stage, the Burns condition can be thus bypassed.

Domaines: Mécanique des fluides [physics.class-ph]; Dynamique des Fluides [physics.flu-dyn]; Physique Générale [physics.gen-ph]; Formation de Structures et Solitons [nlin.PS]; Systèmes Solubles et Intégrables [nlin.SI]; Equations aux dérivées partielles [math.AP]; Analyse classique [math.CA]; Analyse numérique [math.NA]; Physique Numérique [physics.comp-ph]; Physique Classique [physics.class-ph]; Physique Atmosphérique et Océanique [physics.ao-ph]

Matthew J Hunt, Denys Dutykh. Free Surface Flows in Electrohydrodynamics with a Constant Vorticity Distribution. 2020. ⟨hal-02344438v2⟩