Abstract
This study presents numerical predictions of the laminar fluid-flow and heat-transfer characteristics in planar (two-dimensional) impacting tee junctions. The applicable Navier-Stokes equations and the energy equation were solved for airflow at two inlet Reynolds numbers (Re1) and a wide range of the mass split ratio (β). The results include wall shear stress distributions, streamlines showing the number, location, and size of the re-circulation zones, the pressure loss coefficient, wall heat flux distributions, isotherms, and the overall rate of heat transfer. These results indicate that two re-circulation zones always form on the inside-bend wall of the tee at all values of β and Re1. Two more re-circulation zones may form on the impacting wall of the tee depending on the values of β and Re1. It was also found that the pressure loss coefficient reaches a minimum and the overall rate of heat transfer reaches a maximum at even mass split (β = 0.5).
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