液体气溶胶粒子间相互作用的仿真研究

Simulation study of interaction between liquid aerosol particles

针对气溶胶在大规模场地试验会耗费大量的人力物力成本的问题,同时气溶胶本身具有的有害影响不可控,为了提高试验的效率和保证试验的安全可靠性,本文采用CFD软件对气溶胶形成及扩散过程进行计算机仿真研究.本文首先对气溶胶混合气形成的过程进行数值模拟研究,搭建物理和数学模型模拟液态气溶胶生成过程,通过加入气溶胶注入器数目模拟多个气溶胶来源之间的相互影响;再将气溶胶连续注射到立方体模型中,分散气溶胶的浓度被允许自然衰减一段时间.结果如下:当液态气溶胶进入到环境中时,随着时间的推移液态气溶胶在环境中扩散,并且在中下部聚集;当环境压强增加时,扩散速率会有减少.分析仿真结果得出,液态气溶胶模型可以作为一种有效的工具,用于合理分析液态气溶胶扩散所造成的影响.

Aiming at the problem that large-scale field test of aerosol will cost a lot of manpower and material resources,and the harmful effects of aerosol itself are uncontrollable,in order to improve the efficiency of the test and ensure the safety and reliability of the test,in this paper CFD software is used to control the formation of aerosols and the safety and reliability of the test.The diffusion process is studied by computer simulation.Firstly,we conduct numerical simulation research on the formation process of aerosol mixture,builds physical and mathematical models to simulate the formation process of liquid aerosol,and simulate the interaction among multiple aerosol sources by adding the number of aerosol injectors.The aerosol is then continuously injected into the cuboid model,and the concentration of the dispersed aerosol is allowed to decay naturally for a period of time.The results show that when the liquid aerosol enters the environment,it diffuses in the environment and accumulates in the middle and lower parts;when the ambient pressure increases,the diffusion rate will decrease.The analysis and simulation results show that the liquid aerosol model can be used as an effective tool to reasonably analyze the effect of liquid aerosol diffusion.