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<p>The increasing demand for efficient LED cooling solutions has highlighted the importance of heat sink design in improving thermal performance and extending the lifespan of electronic devices. This study investigates the thermal behavior of a radial heat sink with semicircular fins under natural convection, focusing on the influence of orientation angles (0°, 15°, and 30°) and varying heat inputs. What sets this research apart is the detailed examination of semicircular fin geometries, which has received limited attention compared to more traditional designs. The study extensively examines heat transport properties via CFD models and experimental techniques. Significant data indicate that the 30-degree orientation frequently surpasses lesser angles, attaining a superior Nusselt number and enhanced heat dissipation efficiency. Furthermore, the airflow velocity was highest at the 0-degree orientation, resulting in lower heat transfer efficiency due to minimal fin obstruction. The results showed that a 30° inclination significantly enhanced the heat transfer performance, confirmed by both CFD simulations and experimental measurements with less than ± 4.9% error, validating the reliability of the numerical model. The findings provide important information for improving heat sink designs in electronic cooling, especially in LED applications, where effective heat dissipation is essential for boosting performance and longevity.</p>

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Investigating the thermal performance of radial heat sinks with semicircular fins: a CFD and experimental approach

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年5月29日

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  • Yousif Hashim Hussein,
  • Abdulrazzak Akroot,
  • Samet Uslu

摘要

The increasing demand for efficient LED cooling solutions has highlighted the importance of heat sink design in improving thermal performance and extending the lifespan of electronic devices. This study investigates the thermal behavior of a radial heat sink with semicircular fins under natural convection, focusing on the influence of orientation angles (0°, 15°, and 30°) and varying heat inputs. What sets this research apart is the detailed examination of semicircular fin geometries, which has received limited attention compared to more traditional designs. The study extensively examines heat transport properties via CFD models and experimental techniques. Significant data indicate that the 30-degree orientation frequently surpasses lesser angles, attaining a superior Nusselt number and enhanced heat dissipation efficiency. Furthermore, the airflow velocity was highest at the 0-degree orientation, resulting in lower heat transfer efficiency due to minimal fin obstruction. The results showed that a 30° inclination significantly enhanced the heat transfer performance, confirmed by both CFD simulations and experimental measurements with less than ± 4.9% error, validating the reliability of the numerical model. The findings provide important information for improving heat sink designs in electronic cooling, especially in LED applications, where effective heat dissipation is essential for boosting performance and longevity.