3 papers
astro-ph.GA2023
Density profile of a self-gravitating polytropic turbulent fluid in a rotating disk near to the cloud core
S. Donkov, I. Zh. Stefanov, T. V. Veltchev +1
We obtain two equations (following from two different approaches) for the density profile in a self-gravitating polytropic cylindrically symmetric and rotating turbulent gas disk.…
astro-ph.GA2023
Thermodynamics of fluid elements in the context of saturated isothermal turbulence in molecular clouds
Sava Donkov, Ivan Zh. Stefanov, Todor V. Veltchev
The presented paper is an attempt to investigate the dynamical states of an hydrodynamical isothermal turbulent self-gravitating system using some powerful tools of the classical t…
physics.ed-ph2023
Isochoric cooling of air in the University Physics laboratory
Ivan Z. Stefanov, Sava Donkov, Nikolay Denev
In this paper an alternative way of conducting the physics laboratory exercise for determining the adiabatic index of air using the Clement -- Desormes method is proposed. The proc…