Scholarlink

<p>This study numerically investigates the effects of strut cross-sectional shapes in lattice-structured channels on heat transfer characteristics. The lattice structure used in the simulation is face-centered cubic with vertical struts (FCCZ). The FCCZ lattice structure has superior structural stability compared to the FCC structure and a high surface area-to-volume ratio that can enhance heat transfer efficiency. This research examines the variations in the aspect ratios (ARs) (0.5, 0.75, 1, 1.5, and 2) of the strut cross-sections across a range of Reynolds numbers (500, 1000, 1500, 2000, 2500, and 3000). The heat transfer and flow characteristics are represented by the dimensionless numbers, namely Colburn j factor, friction factor, and volume goodness factor, based on the Reynolds number and the AR of the strut cross-section. Results indicate that flow uniformity improves at an AR of 2 than at an AR of 1, resulting in a maximum reduction of 19 % in the Colburn j factor. However, owing to the structural shape, the friction factor decreased by a maximum of 64 %. Consequently, the overall efficiency increased by up to 13 % when the volume goodness factor was employed to analyze heat transfer performance and pressure drop.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of aspect ratio on heat transfer in lattice-structured channels for heat sinks

  • 期刊论文

  • 发表日期：

    2025年10月8日

查看全文
  • Seong Hwan Ahn,
  • Jeong Geun Gwon,
  • Young Min Seo,
  • Hoon Ki Choi,
  • Yong Gap Park

摘要

This study numerically investigates the effects of strut cross-sectional shapes in lattice-structured channels on heat transfer characteristics. The lattice structure used in the simulation is face-centered cubic with vertical struts (FCCZ). The FCCZ lattice structure has superior structural stability compared to the FCC structure and a high surface area-to-volume ratio that can enhance heat transfer efficiency. This research examines the variations in the aspect ratios (ARs) (0.5, 0.75, 1, 1.5, and 2) of the strut cross-sections across a range of Reynolds numbers (500, 1000, 1500, 2000, 2500, and 3000). The heat transfer and flow characteristics are represented by the dimensionless numbers, namely Colburn j factor, friction factor, and volume goodness factor, based on the Reynolds number and the AR of the strut cross-section. Results indicate that flow uniformity improves at an AR of 2 than at an AR of 1, resulting in a maximum reduction of 19 % in the Colburn j factor. However, owing to the structural shape, the friction factor decreased by a maximum of 64 %. Consequently, the overall efficiency increased by up to 13 % when the volume goodness factor was employed to analyze heat transfer performance and pressure drop.