Silva Eva C, Sampaio Álvaro M, Pontes António J
IPC-Institute of Polymers and Composites, Department of Polymer Engineering, Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal.
DONE Lab-Advanced Manufacturing of Polymers and Tools, Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal.
Materials (Basel). 2021 Apr 18;14(8):2041. doi: 10.3390/ma14082041.
This study shows the performance of heat sinks (HS) with different designs under forced convection, varying geometric and boundary parameters, via computational fluid dynamics simulations. Initially, a complete and detailed analysis of the thermal performance of various conventional HS designs was taken. Afterwards, HS designs were modified following some additive manufacturing approaches. The HS performance was compared by measuring their temperatures and pressure drop after 15 s. Smaller diameters/thicknesses and larger fins/pins spacing provided better results. For fins HS, the use of radial fins, with an inverted trapezoidal shape and with larger holes was advantageous. Regarding pins HS, the best option contemplated circular pins in combination with frontal holes in their structure. Additionally, lattice HS, only possible to be produced by additive manufacturing, was also studied. Lower temperatures were obtained with a hexagon unit cell. Lastly, a comparison between the best HS in each category showed a lower thermal resistance for lattice HS. Despite the increase of at least 38% in pressure drop, a consequence of its frontal area, the temperature was 26% and 56% lower when compared to conventional pins and fins HS, respectively, and 9% and 28% lower when compared to the best pins and best fins of this study.
本研究通过计算流体动力学模拟，展示了不同设计的散热器（HS）在强制对流、变化的几何和边界参数条件下的性能。首先，对各种传统HS设计的热性能进行了全面而详细的分析。之后，按照一些增材制造方法对HS设计进行了修改。通过测量15秒后的温度和压降来比较HS的性能。较小的直径/厚度和较大的翅片/针脚间距能提供更好的结果。对于翅片式HS，采用倒梯形且带有较大孔的径向翅片是有利的。对于针脚式HS，最佳选择是在其结构中采用圆形针脚并结合正面孔。此外，还研究了只能通过增材制造生产的晶格HS。六边形晶胞能获得更低的温度。最后，对每类中最佳HS的比较表明，晶格HS的热阻更低。尽管由于其正面面积导致压降至少增加了38%，但与传统针脚式和翅片式HS相比，温度分别低26%和56%，与本研究中最佳针脚式和最佳翅片式HS相比，温度分别低9%和28%。
