Assessment of thermal behavior of nanofluid flow in a wavy walled cavity in presence of sliding motion and magnetic field

Abstract

In this study, magnetohydrodynamic mixed convective heat transport phenomena of CuO-water nanofluid in a double lid-driven cavity having a heated wavy bottom wall is investigated numerically. The cavity in consideration has moving vertical walls, assumed adiabatic. The wavy bottom wall is kept at a high temperature and the top wall is exposed with ambient temperature, respectively. The dimensionless governing equations are discretized and solved using the finite element approach. The impacts of various governing parameters such as the Rayleigh number (Ra = 103–106), Hartmann number (Ha = 0–70), Reynolds number (Re = 10–500), and nanoparticle concentration (φ = 0–3%) are examined and visualized by illustrations of local distributions of streamlines and isotherms. A correlation representing the relationship of the average Nusselt number, Nu in terms of all the examined parameters has been presented. The numerical simulations reveal that the convective heat transfer rate within the wavy enclosure is maximum for higher values of Reynold’s number and nanoparticle concentration and lower values of Hartmann number. Comparisons with other similar published numerical investigations show good agreement with the current outcomes.