Constraining A Bulk Viscous Bianchi Type I Dark Energy Dominated Universe With Recent Observational Data

In this paper, we have investigated a bulk viscous universe with dominance of dark energy in Bianchi type I space-time and constrained its parameter with observational H(z) data (OHD) and joint OHD and Pantheon compilation of SN Ia data. We constrain Hubble's constant H-0 = 69.38(-1.54)(+1.57) and H-0 = 70.017(-1.60)(+1.62) km s(-1)Mpc(-1) by bounding this model with OHD and joint OHD and Pantheon compilation of SN Ia data respectively. These estimated values of H-0 have 1.27 sigma and 1.69 sigma tension with its corresponding Planck collaboration value. We have constrained the best fit value of model parameter zeta as zeta = 0.000027(-0.00052)(+0.00052) and zeta = 0.000033(-0.00296)(+0.00296) respectively for the above observational datasets. We also have obtained a kinematic expression for deceleration parameter and constrained its present value q(0) = -0.582(-0.023)(+0.021) and transition redshift z(t) = 0.723(-0.16)(+0.34). Furthermore, we observe that the derived model exhibits the properties of transitioning the universe and its present age is t(0) = 14.04(-0.32)(+0.33) Gyrs. The kinematics of the Om(z) parameter and the jerk parameter are also discussed and the analysis of these parameters shows a marginal departure of the derived model from the ACDM model of the universe.