Numerical study of periodically turbulent flow and heat transfer in a channel with transverse fin arrays

A numerical study has been conducted for the characteristics of the periodi cally fully developed turbulent flow and heat transfer in a channel with tr ansverse opposite-positioned fins. The Reynolds number range is 2 x 10(4) t o 7 x 104 K-E model and wall function method were adopted during the calcul ation The influence of the thermal boundary condition of the fin to the hea t transfer has been verified For the studied configuration the prominent fe ature that differs from the similar laminar heat transfer is the phenomenon of secondary peak of the Nusselt number distribution Assessment of heat tr ansfer enhancement under the constraint of the same pump Power reveals that the effect of the configuration of the relative fin height, e/H; equal to 0.1 is superior to those of e/H equal to 0.15 and 0.2. Comparing with the r esults of the channel with rod disturbances, the studied configuration poss esses nearly the same heat transfer enhancement effect. Transient simulatio ns to cases with big fin have also been conducted to assure the validity of the steady algorithm.