基于分子动力学模拟的苯甲酰胺气泡崩塌的壁力分析

IF 0.6 4区 工程技术 Q4 MECHANICS Mechanika Pub Date : 2022-08-30 DOI:10.5755/j02.mech.29875
Wei Xu, Xiuli Wang, Jinhua Liu, Yuanyuan Zhao, Guohui Zhao, Wenzhuo Guo
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引用次数: 0

摘要

气泡坍塌过程中冲击波和微射流对污染物壁的空化损伤引起了学者们的广泛关注。然而,许多研究都是从宏观实验的角度对气泡坍塌进行的,其动力学尚不清楚。本文构造了不同半径的气泡,在不同的压缩应变率下运行不同的模型,以污染物上下壁的压力为研究目标,总结了压缩应变率、气泡初始半径和温度对气泡坍塌对污染物壁释放压力的影响。结果表明:随着初始气泡半径的增大,苯甲酰胺上下壁的最大压力先增大后减小。气泡的压力释放速率随着压缩应变速率的增加而增加。基于苯甲酰胺上下壁面的压力,气泡的温度和初始半径影响较大,压缩应变速率的影响较小。在论文的模拟条件下,当利用气泡坍塌释放能量处理污染物时,建议的气泡半径为10-15Å。本文不仅揭示了气泡初始半径、压缩应变速率和温度对气泡坍塌对污染物壁释放压力的影响,而且为空化的应用提供了理论指导。
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Analysis of the Wall Force on the Bubble Collapse of the Benzamide Based on Molecular Dynamics Simulation
The cavitation damage of the pollutant wall caused by shock wave and microjet in the process of bubble collapse has attracted widespread attention from scholars. However, many researches focus on bubble collapse from the macroscopic experimental point of view, the dynamics of which is still not clear. In this paper, it constructs bubbles with different radii, runs different models under different compressive strain rates, takes the pressure on the upper and lower walls of pollutants as the research target, and summarizes the influence of compressive strain rates, initial radius of bubbles and temperatures on the release pressure of bubble collapse on the pollutant wall. The results show that: as the initial radius of bubbles increase, the maximum pressure on the upper and lower walls of benzamide increases first and then decreases. The pressure release rate of bubble increases with the increase of the compressive strain rate. Based on the pressure on the upper and lower wall surfaces of the benzamide, the temperature and initial radius of the bubble have a large influence, and the influence of the compressive strain rate is small. Under the simulation conditions of the paper, when bubble collapse is used to release energy to treat pollutants, the recommended bubble radius is 10-15 Å. The paper not only reveals the influence of the initial radius of the bubble, the compressive strain rate and the temperature on the pressure released by the bubble collapse on the pollutant wall, but also provides theoretical guidance for the application of cavitation.
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来源期刊
Mechanika
Mechanika 物理-力学
CiteScore
1.30
自引率
0.00%
发文量
50
审稿时长
3 months
期刊介绍: The journal is publishing scientific papers dealing with the following problems: Mechanics of Solid Bodies; Mechanics of Fluids and Gases; Dynamics of Mechanical Systems; Design and Optimization of Mechanical Systems; Mechanical Technologies.
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