Finite energy resources and their rapidly waning imprint necessitate a sustainable wastewater treatment method. Nature could be exploited to freeze wastewater in locations which experience subzero temperatures during winter. The two most vital components that influence the efficiency of natural freezing are the ambient temperature and air velocity. The turbulent and unsteady air-cooled natural freezing is simulated for ice crystallization from 0.1 wt % and 1 wt % NiSO₄ (aq) solutions. The efficiency of natural freezing is tested for different air velocities (2 ms⁻¹, 5 ms⁻¹) and levels of undercooling (ΔT = 0.5°C, 1°C) from the freezing temperature of the corresponding solution. The airflow in the winter simulator is modeled by computational fluid dynamics to investigate its behavior and to assess its effect on freezing. © 2017 American Institute of Chemical Engineers AIChE J, 2017

中文翻译：

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冷却风速对冷冻纯化硫酸镍水溶液的影响及CFD分析

有限的能源及其迅速衰落的痕迹需要一种可持续的废水处理方法。在冬天温度低于零的地方，可以利用大自然来冻结废水。影响自然冷冻效率的两个最重要的组成部分是环境温度和空气速度。模拟了湍流和不稳定的风冷自然冷冻，以从0.1 wt％和1 wt％NiSO ₄（aq）溶液中结晶出冰。针对不同的空气速度（2 ms ^-1，5 ms ^-1）和相对应溶液冷冻温度的过冷度（ΔT= 0.5°C，1°C）。冬季模拟器中的气流通过计算流体动力学建模，以研究其行为并评估其对冻结的影响。©2017美国化学工程师学会AIChE J，2017