Numerical study on thermal characteristics of heat sinks with different porous metallic foam configuration designs

作者：Li, Yong-Tong; Gong, Liang^*; Zhang, Ke-Fang; Xu, Hui-Jin

来源：Journal of Engineering Thermophysics, 2015, 36(11): 2422-2426.

• Configuration designs
• Cooling performance
• Field synergy principle
• Fluid flow and heat transfers
• Heat Transfer enhancement
• Porous medium
• Porous metallic foam heat sink
• Thermal characteristics

In this paper, five types of heat sinks with different porous metallic foam configuration designs (fully-filled, triangle-filled, trapezoid-filled, outlet enlarged trapezoid-filled and bottom-filled) are established based on the traditional mini-channel heat sink. The flow and thermal characteristics, including friction factor, averaged Nusselt number, thermal resistance, thermal control effectiveness and thermal performance ratio were investigated in laminar flow range. Moreover, the heat transfer enhancement principle of metallic foam heat sink was analyzed by employing field synergy principle. The results show that the metallic foam filled heat sink can improve the field synergy between the velocity and temperature gradient and the averaged field synergy degree can decrease about 9.6 to 23.2°. The fully-filled heat sink has the minimum thermal resistance in all the configuration designs and holds the best cooling performance. Under the same pumping power, the thermal performance of the fully-filled and the trapezoid-filled heat sink are better than the non-porous filled heat sink when Re larger than 150.

• 出版日期2015
• 单位中国石油大学（华东）