用欧拉-欧拉和欧拉-拉格朗日方法数值研究某工厂室内油雾颗粒浓度分布

IF 1.8 Q3 MECHANICS Fluids Pub Date : 2023-09-26 DOI:10.3390/fluids8100264
Yukun Wang, Jingnan Sun, Meng Zhao, Alicia Murga, Sung-Jun Yoo, Kazuhide Ito, Zhengwei Long
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引用次数: 0

摘要

密闭空间中粒子的迁移和浓度预测对人类福祉至关重要;在当前的全球大流行病期间,这一点尤为明显。计算流体力学(CFD)已被广泛用于此类预测,它依靠欧拉-欧拉(EE)和欧拉-拉格朗日(EL)模型来研究颗粒流动。然而,对工业工厂的研究缺乏。本研究在某工业工厂建立了规模实验室,对某机加工工厂的油雾颗粒进行了屋顶排风和混合通风条件下的油雾分散实验。然后分别采用欧拉法和拉格朗日法计算相同工况下工厂内的油雾浓度分布,并比较相应的计算误差和资源消耗。对于混合通风和顶板排风通风系统,两种方法的模拟结果都是可以接受的。当工厂内涡旋较多时,拉格朗日法在满足计算精度的前提下,计算时间增加53%以上,欧拉法与拉格朗日法的计算误差增大10%左右。对于气动直径为0.5 μm的油雾粒子,欧拉法和拉格朗日法均具有可靠的精度。在相同流场的情况下,拉格朗日方法消耗的计算资源是欧拉方法的400倍以上。该研究可为工业厂房室内颗粒物运移模拟提供参考。
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Numerical Study of Indoor Oil Mist Particle Concentration Distribution in an Industrial Factory Using the Eulerian–Eulerian and Eulerian–Lagrangian Methods
The transport and prediction of the concentration of particles in confined spaces are crucial for human well-being; this has become particularly evident during the current worldwide pandemic. Computational fluid dynamics (CFD) has been widely used for such predictions, relying on Eulerian–Eulerian (EE) and Eulerian–Lagrangian (EL) models to study particle flow. However, there is a lack of research on industrial factories. In this study, a scaled laboratory in an industrial factory was established for oil mist particles in a machining factory, and oil mist dispersion experiments were conducted under roof exhaust and mixed ventilation conditions. After that, the oil mist concentration distribution in the factory under the same working conditions was calculated by Eulerian and Lagrangian methods, and the corresponding calculation errors and resource consumption were compared. It was found that the simulation results of both methods are acceptable for mixed ventilation and roof exhaust ventilation systems. When there are more vortices in the factory, the Lagrangian method increases the computation time by more than 53% to satisfy the computational accuracy, and the computational error between the Eulerian and Lagrangian methods becomes about 10% larger. For oil mist particles with an aerodynamic diameter of 0.5 μm, both Eulerian and Lagrangian methods have reliable accuracy. Based on the same flow field, the Lagrangian method consumes more than 400 times more computational resources than the Eulerian method. This study can provide a reference for the simulation of indoor particulate transport in industrial factories.
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来源期刊
Fluids
Fluids Engineering-Mechanical Engineering
CiteScore
3.40
自引率
10.50%
发文量
326
审稿时长
12 weeks
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