Numerical study of the effect of jet position (JP) on cooling process of an array of heated obstacles simulating electronic components has been investigated based on realizable k–ε model. Jet positions have been changed to impinge each row of obstacles consecutively. The experiments have been achieved at three different values of jet-to-channel Reynolds number ratio, Rej/Rec = 1, 2, and 4. In this study, a comparison between two different cooling processes, cross flow only (CF) and jet impingement with cross flow (JICF), has been achieved. The flow structure, heat transfer characteristics, and the pumping power have been investigated for different jet positions. The results show that the jet position affects significantly the flow structure, as well as the heat transfer characteristics. According to the results of average heat transfer coefficient and the pumping power, the more effective jet position for all values of jet-to-channel Reynolds number ratio (1, 2, and 4) is achieved when the jets impinge the third row of obstacles (JP3).
Effect of Jet Position on Cooling an Array of Heated Obstacles
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received September 15, 2016; final manuscript received January 12, 2017; published online July 6, 2017. Assoc. Editor: Qingang Xiong.
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Maghrabie, H. M., Attalla, M., Fawaz, H. E., and Khalil, M. (July 6, 2017). "Effect of Jet Position on Cooling an Array of Heated Obstacles." ASME. J. Thermal Sci. Eng. Appl. February 2018; 10(1): 011005. https://doi.org/10.1115/1.4036788
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