In this research,three-dimensional flows in the tube banks are anal-ized containing the wall effect by the fin. A three-dimensional Navier-Stokes Equation was used in the curvilinear body-fitted coordinate system with standard κ―ε model for better analysis of recirculation flow. By varying the distance between tubes(pitch length, L/D), tube configuration, and Reynolds number, the changes of flow properties like velocity, pressure are analized to understand the flow characteristics around the tube bank. Also the typical characteristics on the flow for the different parameters are discussed.
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