393 publications from this institution
The present investigation concern with the study on exergy loss and turbulent flow inside a round duct equipped with complex turbulator. The Copper oxide/H2O nanofluid at 0.04 particle volume concentration has been considered as carrier fluid. The tests were examined under the turbulent flow with Reynolds ranges of 5000 < Re < 15000. The duct has been conducted under constant heat flux of wall surface. Outputs indicates that flow blockage increases with augment of Re and b. Exergy drop is reversely proportional to the convective mode and therefore X d declines with rise of tape width and Re.
Influence of adding CuO nanoparticles in the base fluid on flow and heat transfer in an inclined half-annulus was studied considering constant heat flux as boundary condition of hot wall. Control Volume based Finite Element Method (CVFEM) is applied in order to simulate procedure. Pressure gradient source terms are eliminated by using vorticity stream function formulation. Influences of CuO volume fraction, inclination angle and Rayleigh number on hydrothermal manners are presented. Results indicate that inclination angle makes changes in flow style. The strength of eddies reaches to its minimum value when the upper wall is hot. Temperature gradient enhances with rise of buoyancy forces while it reduces with augment of inclination angle.
