Effect of upper and lower moving wall on mixed convection of Cu-water nanofluid in a square enclosure with non-uniform heating

Abstract

Mixed convection of Cu-water nanofluid in a square enclosure with upper and lower moving lid has been investigated numerically. Non-uniform heating is imposed on the left wall, and the right wall is cooled at a constant temperature. Upper and lower walls are taken to be adiabatic. Finite volume-based SIMPLE algorithm has been used to solve the nonlinear equations. Results are presented graphically to describe the effect of nanoparticle volume fraction (0.0.≤φ≤0.2), Richardson number (0.1.≤Ri≤10.0) and the moving walls (upper and lower) on flow field, thermal field and heat transfer rate at a fixed value of Reynolds number Re=100. Results show that heat transfer rate increases remarkably with the addition of nanoparticles. Non-uniform temperature distribution on the left wall affects the thermal field.