溶液蒸发冻结过程中冰体发展的分形模拟研究

摘要

根据溶液在蒸发冻结过程中的复杂性以及液面冰体分布的不规则,结合分形有限扩散聚集(DLA)理论,建立了湿度差作用下溶液蒸发冷冻过程中液面冰体生成、发展过程的数学模型,模拟分析了气流湿度差和气流流速对溶液表面冰体生成、发展的影响.结果表明,利用分形方法可以对溶液蒸发冻结过程中冰体的生成发展进行预测,同时也为研究溶液蒸发冻结和冰体生长提供了新的思路和方法.%With considering complexity in process of the liquor' s evaporation-freezing and irregularity above the liquor surface,generating and developing model of ice above liquor surface was proposed by humidity difference on base of fractal theory and diffusion limited aggregation model (DLA).The effect of gas flow velocity and humidity difference between gas and liquor surface on generating and developing of ice above liquor surface were analyzed by numerical simulation.The results showed that the fractal method could simulate the process generating and developing model of ice above liquor surface.It provided the new thinking and method for the study of the liquor evaporation-freezing and ice growth.