Accretion onto a quintessence contaminated rotating black hole: violating the lower limit for eta over s

Abstract Viscous accretion flow around a rotating supermassive black hole sitting in quintessence tub is studied this article. To introduce such dark energy contaminated hole’s gravitational force, new pseudo-Newtonian potential used. This force can be calculated if we know the distance from center, spin of and equation state inside which considered to lie. helps us avoid complicated nonlinearity general relativistic field equations. Transonic, viscous, continuous Keplerian assumed take place. Fluid speed, sonic speed profile specific angular momentum ratio are found out for different values parameter parameter. Density variation built tallied with observations. Shear viscosity entropy density constructed our model comparison theoretical lower limit done.