  The dynamics of accretion onto a schwarzschild black hole is studied using
Paczynski-Wiita pseudo newtonian potential. Steady state solution of the flow
equations is obtained using thin disc approximation, including the effect of
bremsstrahlung cooling in the energy equation. The topology of transonic
solutions are got and the conditions for shock formation (Rankine-Hugoniot
conditions) are checked. Shock and no-shock regions in the parameter space of
accretion rate and specific angular momentum are identified. We motivate the
time-dependent numerical simulation of the flow, as a candidate for explaining
the quasi periodic oscillations observed in black hole candidates.
