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Numerical and statistical study of heat transfer and entropy generation in a cylindrical heat sink with novel minichannels configuration
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Mohsen Mohammadinejad1   , Alireza Falahat *2 |
1- Department of Mechanical Engineering, Mah.C., Islamic Azad University, Mahshahr, Iran
2- Department of Mechanical Engineering, Mah.C., Islamic Azad University, Mahshahr, Iran , ar.falahat@iau.ac.ir |
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Abstract: (5 Views) |
In the present study, the hydrothermal and thermodynamic performance of water flow in a cylindrical heat sink with novel hybrid minichannels is investigated numerically. The geometry consists of an initial straight section followed by four helical parts with different helical angles. The Taguchi method with an L16 array was employed to reduce the number of simulations and optimize the performance of the heat sink. The five design factors consist of the Reynolds number and four different helical angles along the minichannel at four distinct levels.Their effects on the Nusselt number, Fanning friction factor, total thermal performance factor (TPF), and entropy generation number (EGN) are evaluated. The results revealed that the Reynolds number is the dominant factor influencing both TPF and EGN, with contribution ratios of 80.33% and 78.88%, respectively. Following that, the first helical angle θ₁ exhibited the most significant impact among the geometric parameters, while the contributions of the remaining angles were negligible. The optimal configurations for TPF and EGN are obtained as A₄B₁C₁D₁E₃ and A₄B₁C₁D₁E₁, respectively. Additionally, two optimal combinations were obtained for TPF and EGN, with improvement rates of approximately 54% and 69%, respectively, compared to the original model. |
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| Keywords: Cylindrical heat sink, hybrid mini-channel, entropy generation, Reynolds number, Taguchi method |
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Full-Text [PDF 1438 kb]
(8 Downloads)
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Type of Study: Research |
Subject:
Heat and Mass Transfer
Received: 2026/06/10 | Accepted: 2026/07/27 | Published: 2026/09/1
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| * Corresponding Author Address: ar.falahat@iau.ac.ir |
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