ABSTRACT Spherical flows are a classic problem in astrophysics which typically studied from global perspective. However, much like with accretion discs, there likely many instabilities and small scale phenomena would be easier to study local For this purpose, we develop model for spherically contracting/expanding gas cloud, the spirit of shearing box, β-plane, expanding box models have had exte...

We numerically investigate the effect of non-condensable gas inside a vapor bubble on dynamics, collapse pressure and impact spherical aspherical collapses. Free has damping that can weaken wave enhance rebound. To estimate this numerically, we derive validate multi-component model for bubbles containing gas. For cavitating liquid gas, employ homogeneous mixture with coupled equation state all ...

In this paper, we study spherical gravitational collapse of inhomogeneous pressureless matter in a well-defined n→4d limit the Einstein–Gauss–Bonnet gravity. The leads to either black hole or massive naked singularity depending on time formation trapped surfaces. More precisely, horizon and its development is controlled by relative strengths Gauss–Bonnet coupling (λ) Misner–Sharp mass function ...