Simulation of freezing a sea water droplet moving in a cold air

IF 3.8 2区工程技术 Q1 ENGINEERING, CIVIL

Cold Regions Science and Technology Pub Date : 2024-05-13 DOI:10.1016/j.coldregions.2024.104226

D. Eskin , G. Fisher , M. Vulf , S. Chugunov , S.T. Johansen

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引用次数: 0

Abstract

A rapid freezing of a sea water droplet moving in a cold air is modeled. A droplet freezing model is a key component needed for computational forecasting of ice accretion on surfaces of ships and other equipment operating in low-temperature regions. The freezing process consists of the three stages: 1) water cooling to the incipient solidification temperature; 2) liquid solidification; 3) further freezing of the primarily solidified droplet. An icy region, being formed during the 2nd stage, initially represents a slurry, composed of ice crystals suspended in water. Further cooling is associated with an increase in the crystal concentration that at a certain threshold causes slurry transformation into a spongy (porous) ice. The solidification stage model is composed of the three coupled differential equations formulated in the moving coordinate system. All the physical and thermophysical water properties, required for modeling droplet freezing, are calculated by using the empirical correlations. The set of the equations is solved numerically. The solidification process is illustrated by computational examples for different droplet sizes and water salinities. The computed icy region thickness vs. time, as well as temperature distributions and porosities along droplet radius at different time moments are shown.

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模拟冻结在冷空气中运动的海水水滴

模拟了在冷空气中移动的海水水滴的快速冻结。水滴冻结模型是计算预测在低温区域运行的船舶和其他设备表面结冰情况所需的关键组成部分。冻结过程包括三个阶段：1) 水冷至初始凝固温度；2) 液体凝固；3) 主要凝固液滴的进一步凝固。在第二阶段形成的冰区最初是由悬浮在水中的冰晶组成的浆液。进一步冷却会导致晶体浓度增加，达到一定临界值后，浆料会转变为海绵状（多孔）冰。凝固阶段模型由在移动坐标系中制定的三个耦合微分方程组成。水滴凝结模型所需的所有物理和热物理特性都是通过经验相关性计算得出的。对方程组进行数值求解。通过不同液滴大小和水盐度的计算实例说明了凝固过程。图中显示了计算得出的冰区厚度与时间的关系，以及不同时间时刻沿液滴半径的温度分布和孔隙率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Cold Regions Science and Technology 工程技术-地球科学综合

CiteScore

7.40

自引率

12.20%

发文量

209

审稿时长

4.9 months

期刊介绍： Cold Regions Science and Technology is an international journal dealing with the science and technical problems of cold environments in both the polar regions and more temperate locations. It includes fundamental aspects of cryospheric sciences which have applications for cold regions problems as well as engineering topics which relate to the cryosphere. Emphasis is given to applied science with broad coverage of the physical and mechanical aspects of ice (including glaciers and sea ice), snow and snow avalanches, ice-water systems, ice-bonded soils and permafrost. Relevant aspects of Earth science, materials science, offshore and river ice engineering are also of primary interest. These include icing of ships and structures as well as trafficability in cold environments. Technological advances for cold regions in research, development, and engineering practice are relevant to the journal. Theoretical papers must include a detailed discussion of the potential application of the theory to address cold regions problems. The journal serves a wide range of specialists, providing a medium for interdisciplinary communication and a convenient source of reference.