ISSN Online: 2688-7231
ISBN Flash Drive: 978-1-56700-497-7
ISBN Online: 978-1-56700-496-0
Proceedings of the 25th National and 3rd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2019)
Numerical analysis of mixed convection flow using non-Boussinesq approximation lattice Boltzmann method
Аннотация
The present work includes a numerical analysis of mixed
convection flow using lattice Boltzmann method taking non-
Boussinesq effect into the consideration. In conventional
ways, the momentum and thermal relaxation times are
specified at the beginning and are then kept constant
throughout the simulation process. However, in the present
model, as kinematic viscosity υ and thermal diffusivity α are functions of local temperature and the respective relaxation times are the function of these two parameters. Thereby, the numerical simulation is formulated accordingly. The simulations are done at Re=100 and Pr=0.71 varying aspect ratio for 4 and 2. The effect of aspect ratios is depicted in terms of streamlines, isotherms. It is also found from the study that inclination angle has a pronounced effect on both the Nusselt number and entropy generation values.