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Optimization of a rectangular pin fin using elliptical perforations with different inclination angles

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Abstract

An innovative form of a perforated fin (with inclination angles) was considered. In most previous studies, pin fins were perforated in a straight direction to improve the thermal performance of the heat sink. The present rectangular pin fin consisted of an elliptical perforation with two models and two cases. The signum function was used to model the opposite and mutable approach of the heat-transfer area. The degenerate hypergeometric equation was used as a new derivative method to determine a general solution and solved by Kummer’s series. Two validation methods (previous work and Ansys 16.0 steady-state thermal analysis) were considered. The strong agreement of the validation results (0.31 %-0.52 %) showed the reliability of the presented model. The use of the perforated fin reduced the thermal resistance and improved the thermal performance of the pin fin by enhancing heat transfer and increasing the Nusselt number. Moreover, increasing the inclination angle, size, and number of perforations can optimize the present model by maximizing heat transfer and minimizing the weight and length of the pin fins. Increasing the open-area ratio minimizes entropy generation at a certain Rayleigh number and constant heat flux.

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Authors and Affiliations

  1. Department of Mechatronics Engineering, AL-Khwarizmi College of Engineering, Baghdad University, Baghdad, Iraq

    Hisham H. Jasim

  2. Department of Mechanical Engineering, Faculty of engineering, Gaziantep University, Gaziantep, Turkey

    Hisham H. Jasim & Mehmet Sait Söylemez

Authors
  1. Hisham H. Jasim
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  2. Mehmet Sait Söylemez
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Correspondence to Hisham H. Jasim.

Additional information

Recommended by Associate Editor Ji Hwan Jeong

Hisham H. Jasim is the Lecturer in the Department of Mechatronics, Al-Khawarizmi College of Engineering, University of Baghdad. His research interests are in the areas of heat transfer applications, the simulation and experiments in heat sink design, developments in the design of thermal systems, heat source in electronic Packages and advanced conduction problems.

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Jasim, H.H., Söylemez, M.S. Optimization of a rectangular pin fin using elliptical perforations with different inclination angles. J Mech Sci Technol 31, 5029–5039 (2017). https://doi.org/10.1007/s12206-017-0951-1

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  • DOI: https://doi.org/10.1007/s12206-017-0951-1

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