超浸润金刚石微通道双流体能质传输强化及调控机理

电子系统不断微型化和高集成化发展导致严重的热障问题，已经成为高功率半导体器件在重大科技领域应用的关键技术瓶颈，也是横跨材料学、传热学、流体力学等多学科交叉融合的共性基础科学难题。本项目围绕微通道散热的结构材料与冷却工质进行系统优化，提出液态金属与水混合的双流体冷却模型，研究超浸润金刚石微通道双流体冷却相关理论及关键技术。针对微通道小尺度效应及液态金属表面黏度特征引发的流阻问题，研究金刚石润湿性能调控理论及方法，探索液态金属分散、融合及变形规律，建立双流体协同润湿减阻模型。通过数值模拟、实验研究、可视化观测相结合的方法，探索双流体冷却系统的多自由度调控机理，解决固-流-电-热-力多场耦合作用下微通道双流体协同换热及热展开问题，提出超浸润金刚石微通道双流体能质传输强化理论及调控方法。为超高热流密度微流体冷却技术发展提供了一种新的思路，具有现实需求紧迫性、跨学科基础性和技术发展前瞻性等重要意义。

The continuous development of miniaturization and high integration of electronic systems has led to serious thermal barrier problems, which has become the key technical bottleneck for the application of high-power semiconductor devices in major scientific and technological fields, and also a common basic scientific problem that covers the interdisciplinary integration of materials science, heat transfer science, fluid mechanics and other disciplines. This project focuses on the systematic optimization of structural materials and cooling medium of micro-channel heat dissipation, proposes a two-phase fluid cooling model of liquid metal mixed with water, and studies related theories and key technologies of double-fluid cooling of super-infiltrated diamond micro-channel. In view of the flow resistance problems caused by micro-channel small-scale effect and liquid metal surface viscosity characteristics, the wettability control theory and method of diamond are studied, the dispersion, fusion and deformation rules of liquid metal are explored, and the co-wetting drag reduction model of two-phase fluid is established. By combining numerical simulation, experimental research, and visual observation methods, the multi-degree-of-freedom control method of two-phase fluid cooling system is explored, and the heat transfer and temperature uniformity of microchannel cooling with two-phase fluid under solid-fluid-electric-thermal-mechanical multi-field coupling are studied, to proposes an enhancement theory and control method of mass and energy transfer in super-infiltrated diamond microchannels. It provides a new way of thinking for the development of ultra-high heat flux microfluidic cooling technology, and has important significance such as the urgency of practical demand, interdisciplinary foundation and prospective technology development.