基于多孔结构的毛细蒸发传热可实现比单相对流传热高两个数量级以上的热流密度，因此被认为是最有发展前景的高效散热方式之一。本课题拟在已有研究的基础上，进一步探讨多孔结构中孔隙的非均匀润湿性对毛细蒸发传热的影响，并从微观界面、孔隙尺度和宏观尺度三个层面上对基于混合润湿性多孔结构的毛细流动与蒸发传热的相互耦合机理进行研究。明确在不同的微观结构参数和非均匀的表面润湿性条件下孔隙中液体蒸发界面的空间分布特性以及蒸发过程中界面的不稳定性；获得浮升力、粘滞力、表面张力、热毛细力等力场与蒸发界面附近流场和温度场间的定量关系。通过开展孔隙尺度微流场的可视化及定量化实验，对理论和数值模型进行验证和必要的改进。建立基于混合润湿性多孔结构毛细蒸发传热的孔隙尺度与宏观尺度耦合模拟的多尺度数值模型。并以此为基础，提出一种以强化整体传热能力为目标的参数优化方法，为突破相关热管理技术的热学性能瓶颈提供理论和方法指导。

Capillary evaporation based on porous structures has been proved to achieve heat flux of two orders of magnitude higher than single-phase heat transfer. Therefore it is considered to be one of the most promising heat dissipation methods. In this project, we focus on porous media with mixed wettability, and we aim to explore the effect of the non-uniform wettability in the pores on the capillary evaporation heat transfer process. The studies on the coupling mechanism of the capillary flow and the evaporative heat transfer will be conducted on different length scales, i.e. interface, pore-scale and macro-scale. The effects of microstructure and wettability parameters on the dynamic behavior of the evaporation interface in pores will be investigated in detail. The quantitative relations between the force fields, such as buoyancy force, viscous force, surface tension, thermocapillary force, and the flow and temperature patterns will be revealed. Furthermore, through the pore-scale visualization experiments, the theoretical and numerical models will be verified and the necessary improvements on them will be made. A multi-scale numerical model of the capillary evaporation heat transfer based on the mixed wettability porous structures will also be established. Based on these studies, optimization methods for strengthing the overall heat transfer will be provided, which will, therefore, provide necessary guidance for breaking through the bottleneck of relevant heat management technologies in terms of thermal performance.