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Two-dimensional periodically fully developed laminar forced convection fluid  flow and heat transfer characteristics in a horizontal channel with staggered  fins are investigated numerically under constant wall heat flux boundary  condition. Study is performed using ANSYS Fluent 6.3.26 which uses finite  volume method. Air (Pr @ 0.7) and Freon-12 (Pr @ 3.5) are used as working  fluids. Effects of Reynolds number, Prandtl number, fin height, and distances  between two fins on heat transfer and friction factor are examined. Results  are given in the form of non-dimensional average Nusselt number and average  Darcy friction factor as a function of Reynolds number for different fin  distances and Prandtl numbers. The velocity and temperature profiles are also  obtained. It is seen that as the fin distance increases, behavior approaches  the finless channel, as expected. Also, thermal enhancement factors are given  graphically for working fluids. It is seen that heat transfer dominates the  friction as both the distance between two fins and Prandtl number increase.  It is also seen that fins having blockage ratio of 0.10 in two dimensional  periodically fully developed laminar flow is not advantageous in comparison  to smooth channel without fins.

Periodically fully developed laminar flow and heat transfer in a two-dimensional horizontal channel with staggered fins