Experimental investigation of manifold microchannel heat sink structures on flow and heat transfer characteristics

作者：Hao Han, Jinjin Xu, Lei Li, Gongming Xin, Jingzhi Zhang · 发表于：Case Studies in Thermal Engineering · 年份：2025 · DOI：10.1016/j.csite.2025.107351 · 被引用次数：12 · 研究领域：Heat Transfer and Optimization、Nanofluid Flow and Heat Transfer、Microfluidic and Capillary Electrophoresis Applications

With the continuous increase in heat flux of electronic devices, developing efficient cooling solutions has become an urgent need. The manifold microchannel heat sink has gained significant research attention due to its compact structure and excellent heat transfer performance. Current studies mainly focus on optimizing single configurations, while systematic comparisons of different structures under various operating conditions are lacking. To clarify the advantages and disadvantages of different microchannel configurations across flow rate ranges and to provide guidance for the selection and design of high-performance manifold microchannel heat sinks, this study designed and constructed a flow-visualization experimental setup to investigate the flow and heat transfer characteristics of conventional rectangular manifold microchannel heat sink, parallel slit manifold microchannel heat sink and staggered fin manifold microchannel heat sink. The experiments employed deionized water as the working fluid under a constant heating power of 600 W, with the inlet temperature maintained at 298 K and flow rates varying from 100 to 430 g/min. The results show that below 145 g/min, the staggered fin manifold microchannel exhibits the lowest pressure drop, approximately 40% lower than that of the conventional rectangular type. Above 145 g/min, the conventional rectangular manifold microchannel shows the lowest pressure drop. In the flow rate range of 100–130 g/min, the average temperature...