46 citations · 211 across the 12 of their papers we have counts for
6 papers · 1 filter
Transient growth and coupling of vortex and wave modes in self-gravitating gaseous discs
G. R. Mamatsashvili, G. D. Chagelishvili
Flow nonnormality induced linear transient phenomena in thin self-gravitating astrophysical discs are studied in the shearing sheet approximation. The considered system includes tw…
Stability and nonlinear adjustment of vortices in Keplerian flows
G. Bodo, A. Tevzadze, G. Chagelishvili +3
We investigate the stability, nonlinear development and equilibrium structure of vortices in a background shearing Keplerian flow. We make use of high-resolution global two-dimensi…
Comments on ``An Exact, Three-Dimensional, Time-Dependent Wave Solution in Local Keplerian Flow'' by Balbus and Hawley (astro-ph/0608429)
G. D. Chagelishvili, A. G. Tevzadze
We analyze the scepticism on the hydrodynamic turbulence in Keplerian astrophysical disks expressed in Balbus and Hawley 2006 and show the failure of arguments of the paper.
Linear coupling and over-reflection phenomena of magnetohydrodynamic waves in smooth shear flows
G. Gogoberidze, G. D. Chagelishvili, R. Z. Sagdeev +1
Special features of magnetohydrodynamic waves linear dynamics in smooth shear flows are studied. Quantitative asymptotic and numerical analysis are performed for wide range of syst…
Spiral density wave generation by vortices in Keplerian flows
G. Bodo, G. Chagelishvili, G. Murante +3
We perform a detailed analytical and numerical study of the dynamics of perturbations (vortex/aperiodic mode, Rossby and spiral-density waves) in 2D compressible disks with a Keple…
Linear dynamics of the solar convection zone: excitation of waves in unstably stratified shear flows
G. D. Chagelishvili, A. G. Tevzadze, M. Goossens
In this paper we report on the nonresonant conversion of convectively unstable linear gravity modes into acoustic oscillation modes in shear flows. The convectively unstable linear…