Investigation of numerical study of turbulent flow in a rectangular duct with ribbed-grooved

In this numerical study, on the turbulent forced convection heat transfer of rib-groove turbulators in a rectangular duct under a uniform heat flux boundary condition the flow and heat transfer characteristics is analyzed. Air (Pr = 0,7) has been used as fluid. Flow and heat areas are numerically solved via help of ANSYS 12.0 FLUENT packet program. Numerical study has been performed with Reynolds number in the range of 3 000 to 10 000. SST k-w turbulent model has been used as turbulent model. The basic conservation equations have been solved are the continuity, momentum and energy equations on the turbulent flow for three dimensional, Newtonian, incompressible, steady state and constant fluid properties. The fluid enters the duct with the uniform velocity and the environment temperature. Uniform heat flux has been applied from the subsurface where the duct?s turbulators are placed. Isolated boundary condition has been applied for the side and upper surfaces of the duct. That has been adopted there is no slip at side walls of the duct. Fluid passes through the duct and reaches the environment. Influences of rib-groove arrangements on the Nusselt number and friction factor have been discussed and compared with smooth duct results under similar origin conditions. Correlations for heat transfer and the friction factor values have been suggested for smooth duct. Finally the obtained results of this study have been described as change of the Nusselt number (Nu), the friction factor (f) and thermal enhancement factor (?) with the Reynolds number (Re) and the groove pitch (P). The most appropriate turbulator geometry has been determined.