75 citations · 258 across the 12 of their papers we have counts for
11 papers · 1 filter
Higher Order Stability Analysis for Astrophysical Accretion Processes
Sayan Kundu, Kinsuk Giri
We have done nth order perturbation analysis of the Navier-Stokes equation with the presence of turbulent viscosity in context of thin accretion flow around a black hole. In order…
Dynamics of Magnetic Flux Tubes in an Advective Flow around a Black Hole
Arnab Deb, Kinsuk Giri, Sandip K. Chakrabarti
Entangled magnetic fields entering into an accretion flow would very soon be stretched into a dominant toroidal component due to strong differentially rotating motion inside the ac…
Numerical Simulation of Vertical Oscillations in an Axisymmetric Thick Accretion Flow around a Black Hole
Arnab Deb, Kinsuk Giri, Sandip K Chakrabarti
We study time evolution of rotating, axisymmetric, two dimensional inviscid accretion flows around black holes using a grid based finite difference method. We do not use reflection…
Segregation of a Keplerian disc and sub-Keplerian halo from a Transonic flow around a Black Hole by Viscosity and Cooling processes
Kinsuk Giri, Sudip K. Garain, Sandip K. Chakrabarti
A black hole accretion is necessarily transonic. In presence of sufficiently high viscosity and cooling effects, a low-angular momentum transonic flow can become a standard Kepleri…
Effects of Turbulent Viscosity on A Rotating Gas Ring Around A Black Hole: Results in Numerical Simulation
Kinsuk Giri, Hsiang-Kuang Chang
In this paper, we present the time evolution of a rotationally axisymmetric gas ring around a non rotating black hole using two dimensional grid-based hydrodynamic simulation. We s…
Numerical Simulations of a Two Component Advective Flow for The Study of the Spectral and Timing Properties of Black Holes
Kinsuk Giri, Sandip K. Chakrabarti
Two component advective flows are the most physical accretion disks which arise from theoretical consideration. Since viscosity is the determining factor, we investigate the effect…
Role of Viscosity and Cooling in Hydrodynamic Simulation of Two Component Accretion Flow (TCAF) around Black Holes
Kinsuk Giri, Sandip K. Chakrabarti
We carry out numerical simulation of accretion flows around a black hole in presence of both viscous and cooling effects. Instead of using a constant parameter throughout the s…
Hydrodynamic Simulation of Two Component Advective Flows around Black Holes
Kinsuk Giri, Sandip K. Chakrabarti
We carry out a series of numerical simulations of viscous accretion flows having a reasonable spatial distribution of the viscosity parameter. We add the power-law cooling througho…
Hydrodynamic simulations of viscous accretion flows around black holes
Kinsuk Giri, Sandip K. Chakrabarti
We study the time evolution of a rotating, axisymmetric, viscous accretion flow around black holes using a grid based finite difference method. We use the Shakura-Sunyaev viscosity…
Effects of Compton Cooling on the Hydrodynamic and the Spectral Properties of a Two Component Accretion Flow around a Black Hole
Himadri Ghosh, Sudip K. Garain, Kinsuk Giri +1
We carry out a time dependent numerical simulation where both the hydrodynamics and the radiative transfer are coupled together. We consider a two-component accretion flow in which…
Hydrodynamic Simulations of Oscillating Shock Waves in a Sub-Keplerian Accretion Flow Around Black Holes
Kinsuk Giri, Sandip K. Chakrabarti, Madan M. Samanta +1
We study the accretion processes on a black hole by numerical simulation. We use a grid based finite difference code for this purpose. We scan the parameter space spanned by the sp…