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Mesoscopic investigation of frost crystal nucleation on cold surface based on the lattice-Boltzmann method

机译：基于格子玻璃晶格的冷表面霜晶核的介观研究

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摘要

A lattice Boltzmann method (LBM) two-dimensional (2D) mesoscopic model is presented for studying the frost crystal nucleation process involved in liquid-solid phase change on a cold surface. In order to make the simulation more realistic, the actual frost crystal nucleus deformation process is considered in this model. The simulation results agree well with our experimental results. Detailed analysis was made on the dynamic behavior of liquid-solid phase change and heat transfer happening in the frost crystal nucleation process. Results are presented for the evolution law of frost crystal nucleus deformation, dynamic solid-liquid phase change process as well as the dynamic distribution of frost nucleus interior temperature during frost crystal nucleation. In addition, the occurrence of frost crystal nucleus deformation is explained by the theory of crystal growth. Finally, where and why the initial position of frost crystal growth happens is also revealed. Furthermore, the reason why the hydrophobic surface can delay the droplet freezing and why the frost growth is faster on the hydrophobic surface after the droplet is frozen is analyzed based on this model.
机译：提出了一种晶格Boltzmann方法（LBM）二维（2D）介观模型，用于研究冷表面上液体固相变化中涉及的霜晶核法。为了使模拟更现实，在该模型中考虑了实际的霜晶核变形过程。模拟结果与我们的实验结果很好。对液体固相变化的动态行为进行了详细分析，霜冻晶体成核过程中发生的热传递。霜冻晶核变形的演化定律，动态固液相变过程以及霜晶核期间的霜核内部温度的动态分布。此外，通过晶体生长理论解释了霜晶核变形的发生。最后，还揭示了霜晶体增长的初始位置的地点和原因。此外，基于该模型分析液滴后，疏水表面可以延迟液滴冷冻的原因，液滴冷冻液滴在疏水表面上更快。

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