A slanted porous enclosure filled with Cu-water nanofluid
Department of Mathematics, Bharathiar University, 641046, Coimbatore, India
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Revised: 2 February 2016
Accepted: 21 February 2016
Published online: 14 April 2016
A numerical investigation to study the laminar mixed convection flow of Cu-nanofluid in a 2D inclined porous enclosure with moving top lid is carried out. The two vertical walls of the enclosure are insulated while the horizontal walls are kept at uniform temperatures with the bottom wall being hotter than the top wall. The governing equations are solved by the finite-volume method. The effects of the Richardson number, the porosity, the Darcy number, the inclination angle, and the solid volume fraction on the fluid flow and temperature field are analyzed. An increase in the inclination angle in the lower medium permeability does not affect the fluid flow and temperature fields considerably. As a result, there is no significant change in the overall heat transfer rate with respect to the inclination angle at lower medium permeability. It is found that the average Nusselt number increases with the increase of solid volume fraction in porous cavity. The overall heat transfer rate decreases with the increase of inclination angle at the natural and mixed convection regimes.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2016