Sensitivity of Spectral and Temporal Properties of Accretion and Outflows on Space Time Geometry, Viscosity and Cooling

In this chapter, we describe the development of a radiation hydrodynamic simulation code and discuss the results obtained when we use it to study the dynamics of an accretion disk around a galactic black hole. For the first time, we are able to consider the presence of both the components of the two component advective (TCAF) model, namely, the Keplerian disk and sub-Keplerian halo, in a single simulation. These simulations give us the opportunity to study simultaneously the time dependence of the disk structure and its spectral as well as temporal properties. We prove several of the conjectures that were made earlier based on theoretical studies and other simulations. We also discuss the current developments in this simulation code and the future scopes.