Hydrodynamic models of astrophysical wormholes: The general concept

We study the amplification of shallow-water waves in course their propagation a duct variable cross section with spatially inhomogeneous flow. derive basic set equations for wave and present asymptotic analysis solutions neighborhood critical points where speed coincides current. The considered model represents kinematic analog astrophysical event horizons occurring vicinity black holes (BH) or white (WH). then flow two (two horizons) when transits first BH horizon WH one vice versa. In former case, region between mimics wormhole general relativity. theoretical results are illustrated by numerical calculations through points. It is shown that after passing active zone takes place BH–WH arrangements only can occur different relationships subcritical supercritical velocities. frequency dependence factor obtained quantified terms velocity ratio within outside “wormhole domain.”