03.2021.75.89

Investigation Of Heat Transfer Enhancement For Different Shapes Pin-Fin Heat Sink

Author(s):

Hadeel Abdulhadi Jasim †, Muna S. Kassim†, Ammar A. Hussain†, Laith Jaafer Habeeb‡*

Affiliation(s):

† Mechanical Engineering Department, Mustansiriyah University, Al-Bab AL-Muatham, Baghdad, Iraq

‡ Training and Workshop Centre, University of Technology – Iraq, Baghdad, Iraq

Corresponding Author Email: 20021@uotechnology.edu.iq

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

The advantages of utilizing cylindrical pin fins with multiple circular stenosis’s on the surface of the fin have been investigated using experimentally and Computationally Fluid Dynamics (CFD) methods. The empirical heat sink was designed and manufactured with multiple circular stenosis on the fin surface and studies the influence of the stenosis’s on pin fin designing on enhance heat transition and decrease pressure drop across heat sinks. Air assumed to use as a working fluid subjected to heat flux 25000 w/m2. The study was carried out for Reynolds number ranging 1797.2 to 5391.7. The empirical data be found to be well consistent with the predictions from the (CFD) model for coupled heat transition to the cooling air stream. The results explained that pin fins heat sinks with multiple circular stenosis on the fin surface have inferior pressure drop and high heat transition, contrast to normal fins heat sinks. The heat transfer improvement of the newly designed heat dispersants is about 100% to 223.9% higher compared to normal fins. These benefits arise not only due to augmented surface area but also due to enhanced heat transition close to stenosis’s due to airflow between the stenosing fins that form secondary flow paths.