Variation of the gas and radiation content in the sub-Keplerian accretion disk around black holes and its impact to the solutions

► The polytropic index (γ) and ratio of gas to total pressures (β) are shown to vary significantly in accretion flows. ► The values of γ and β could vary respectively, up to 20% and 300%. ► Solutions established based on constant γ throughout would misinterpret the physics of flows in certain regimes. ► This has a significant impact in explaining observed data.