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We present the relativistic 2D and 3D GRMHD simulation of axisymmetric,inviscid, hydrodynamic accretion flows in a fixed Kerr black hole gravitationalfield. The flow is having low angular momentum with respect to Keplerian one. Arelativistic fluid where its bulk velocity is comparable to the speed of light,flowing in the accretion disk very close to the horizon should be described byadiabtic index: 4=3 < g < 5=3 .The time dependent evolution of shock positionand respective effect on mass accretion rate and oscillation frequency withvarying adiabatic index has been studied. Here we present some of the resultsfor adiabatic index = 1.4 in a 2D and 3D model.

Time variability of low angular momentum accretion flows around black hole