Haj Ibrahim Samih, Wejrzanowski Tomasz, Karl Christian W, Sagvolden Espen, Karwaszewski Jakub, Pilz Monika, Przybyszewski Bartłomiej, Kozera Rafał
Technology Partners Foundation, Bitwy Warszawskiej 1920 r. 7A, 02-366 Warsaw, Poland.
Department of Functional Materials Engineering, Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland.
Materials (Basel). 2024 Dec 17;17(24):6155. doi: 10.3390/ma17246155.
Within this study, a methodology for the numerical simulation of droplet freezing, including a micrometer texturized pattern, was developed. The finite volume method was then applied to simulate the behavior of water droplets. The procedure was divided into two processes: stabilization and freezing. In the stabilization step, the droplet was dropped onto the material surface and took an equilibrium shape. In the second step, additional energy equation and temperature boundary conditions were applied to perform freezing simulation. Based on the laser-texturized samples of polyurethane-coated metal substrates studied with freezing delay experiments, numerical models were generated, and droplet freezing simulations were performed. Three cases were studied-non-texturized and texturized with respectively linear and triangular patterns. The obtained simulation results of freezing time were compared with experimental measurements to evaluate the proposed methodology. The study revealed that despite the inability to predict accurate freezing delay time, the proposed methodology can be used to compare the freezing delay capabilities for different texturized patterns. Additionally, the proposed model renders it possible to analyze additional aspects of wetting and freezing of the droplet on rough surfaces, which may be helpful in understanding these processes.
在本研究中，开发了一种用于液滴冻结数值模拟的方法，包括一种微米级纹理图案。然后应用有限体积法来模拟水滴的行为。该过程分为两个阶段：稳定和冻结。在稳定步骤中，将液滴滴到材料表面并形成平衡形状。在第二步中，应用附加的能量方程和温度边界条件进行冻结模拟。基于通过冻结延迟实验研究的聚氨酯涂层金属基板的激光纹理化样品，生成了数值模型，并进行了液滴冻结模拟。研究了三种情况——无纹理以及分别具有线性和三角形图案的纹理化情况。将获得的冻结时间模拟结果与实验测量值进行比较，以评估所提出的方法。研究表明，尽管无法预测准确的冻结延迟时间，但所提出的方法可用于比较不同纹理图案的冻结延迟能力。此外，所提出的模型使得分析粗糙表面上液滴的润湿和冻结的其他方面成为可能，这可能有助于理解这些过程。
