  A direct numerical simulation of the interaction of plane capillary waves on
the surface of a liquid dielectric in an external tangential electric field
taking into account viscous forces has been performed. It has been shown that
the interaction of counter-propagating nonlinear waves can generate a direct
energy cascade. In the quasistationary energy dissipation regime, probability
density functions for angles of inclination of the boundary tend to a Gaussian
distribution and the shape of the boundary becomes complex and chaotic. The
spectrum of the surface perturbations in this regime is described by a power
law $k^{-5/2}$. The energy spectrum has the form $k^{-3/2}$, which coincides
with the Iroshnikov-Kraichnan energy spectrum and indicates that the observed
wave turbulence of the liquid surface and the weak magnetohydrodynamic
turbulence of interacting Alfv\'en waves have a related nature.
