Particle Hydrodynamics scheme. Here, we inject SPH particles with radial velocity $v_{\rm inj}$, angular momentum ${\lambda}_{\rm inj}$ and sound speed $a_{\rm inj}$ at the injection radius $r_{\rm inj}$. Initially, the accreting matter is treated as inviscid in nature. At the injection radius, the disc height is estimated considering the fact that the flow remain in hydrostatic equilibrium in the vertical direction and obtained as $H_{\rm inj} \sim a_{\rm inj} r^{1/2}_{\rm inj}(r_{\rm inj}-1)$. With the suitable choice of flow parameters at the injection radius, accretion flow may undergo shock transition. For a given set of flow parameters like the Bernoulli parameter ${\cal E}=0.00449$ and the specific angular momentum $\lambda=1.63$, we plot the equatorial Mach number $M=v_r/a$ of the flow with $r$ at $t=317.39t_g$, and the transient shock is at $r_s=7.5r_g$ (Fig. 1a). The steady state is reached at $t=10^4t_g$, and the stationary shock settles at $r_s=15r_g$ (Fig. 1b). The steady state angular momentum distribution on the equatorial plane is shown in Fig. 1c. The position of the SPH particles in steady state is shown in Fig. 1d in the $r-z$ plane.

Once the steady state is achieved in the inviscid limit, we turn on the viscosity. It must be pointed out 