Abstract: Three-dimensional numerical simulation on the evaporative surface of the micro wick structures in heat pipes was conducted using interfacial tension theory and surface discrete method. The micro menisci caused by wetting were discretized with triangle-based mesh. Following the principle of minimizing free energy, the thermodynamic equilibrium status was then determined by moving mesh nodes. The behaviors of capillary force, total evaporation area, and thin-film area, etc. were studied systematically with different geometric parameters and contact angles.

Key words: energy minimization, interfacial tension, computer simulation, evaporation, film, microscale, steady state, wick

摘要： 采用表面张力理论和曲面离散化方法对热管吸液芯微细孔槽结构中的蒸发液面进行了三维数值模拟，将因润湿产生的弯曲液面用三角形网格进行离散，以能量最小化为原则，通过移动节点的位置来确定液面的热力学平衡态位置。揭示了两种基本模型在不同几何参数以及不同固液接触角等因素下，毛细力、总蒸发面积、薄膜区域等主要的吸液芯特性参数的变化规律。

关键词: 能量最小化, 界面张力, 计算机模拟, 蒸发, 膜, 微尺度, 稳态, 吸液芯