Effect of Flow Attack Angle on Heat Transfer, Friction Loss and Thermal Performance in Square Channel with Inclined Wavy Surface
Keywords:
wavy surface, heat transfer, thermal performance, Nusselt number, square channelAbstract
Effects of flow attack angles for inclined wavy surface on heat transfer rate, friction loss and thermal performance in a square channel are investigated numerically. The inclined wavy surface with square profile is inserted in the middle of the square channel to increase heat transfer rate and performance. The current study is solved by finite volume method with SIMPLE algorithm. The convective heat transfer in turbulent regime, Re = 3000 – 10,000, is considered. The flow structure and heat transfer behavior in the test section are presented in the numerical results. The thermal performance is also analyzed in terms of Nusselt number ratio (Nu/Nu0), friction factor ratio (f/f0) and thermal enhancement factor (TEF). The maximum heat transfer rate is detected at the flow attack angle of 45o, while the extreme pressure loss is found at the flow attack angle of 60o. The optimum TEF are found at the flow attack angle of 30o and 45o around 1.9. Â
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