AUGMENTATION OF HEAT TRANSFER IN A CHANNEL USING A TRIANGULAR PRISM WITH VARYING INLET TURBULENT INTENSITY
Heat transfer in a channel in presence of a equilateral triangular prism has been computationally investigated in the laminar to turbulent flow regime with Reynolds number ranging from 1,000- 2,00,000. The hydraulic diameter of the cylinder is taken as characteristics length. The flowing medium i.e., air is consider to have constant Prandtl number. The inlet turbulent intensities are taken from 5% to 40%.The aspect ratio between channel to the prism element is fixed 4. The governing equations for three dimensional continuity, Navier-Stokes and energy equation are solved using Transition SST Model which can resolve the flow field in laminar, transition, and turbulent regime. The discretized equations are then linearized using an implicit scheme and solved iteratively using Ansys Fluent 14.5. The governing equations of continuity, momentum, and energy equations are solved steady Transition SST Model. The results show that in presence of triangular prism, heat transfer in a channel is augmented by around 12%. The study quantifies the effect of inlet turbulence intensity on enhancing heat transfer from triangular prism. Augmentation is associated with higher values of skin friction coefficient on channel wall.