人体咳嗽飞沫传播DPM模拟与实验对比
摘要：利用现有文献中的实验数据，对单个液滴自由落体运动过程的蒸发模型进行了验证。将离散相模型(DPM)加入蒸发模型，对人咳嗽喷出的飞沫液滴在室内随时间发展变化的特征和分布进行了模拟。模拟结果与现有不同相对湿度下的实验结果吻合得较好。在高相对湿度情况下，液滴蒸发较慢，有利于液滴的重力沉降，使得最后漂浮在空中的病毒飞沫含量更低，有助于防止病毒的传播。
关键词：液滴病毒传播咳嗽蒸发离散相模型DPM)
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参考文献[1] 于玺华.微生物气溶胶的特性：兼论新型冠状病毒传播的防护[J].暖通空调，2022,52(4):108- 112.
[2] 林秀丽，张莹莹，柳静献.公交车内飞沫运移的数值模拟[J].东北大学学报(自然科学版),2021,42(5):726- 733.
[3] 张桉康，张华玲，刘鹏.普通病房飞沫污染物传播特性与评价[J].重庆大学学报，2021,44(3):82- 92.
[4] 汪新智，任安星，武永吉，等.基于欧拉-拉格朗日方法的携病毒飞沫扩散过程的数值模拟[J].自然杂志，2020,42(3):239- 248.
[5] YANG W,MARR L C.Dynamics of airborne influenza A viruses indoors and dependence on humidity[J].PLoS one,2011,6(6):e21481.
[6] MARR L C,TANG J W,VAN MULLEKOM J,et al.Mechanistic insights into the effect of humidity on airborne influenza virus survival,transmission and incidence[J].Journal of the royal society interface,2019,150:20180298.
[7] LI X D,SHANG Y D,YAN Y H,et al.Modelling of evaporation of cough droplets in inhomogeneous humidity fields using the multi-component Eulerian-Lagrangian approach[J].Building and environment,2018,128:68- 76.
[8] WEI J J,LI Y G.Enhanced spread of expiratory droplets by turbulence in a cough jet[J].Building and environment,2015,93:86- 96.
[9] GUPTA J K,LIN C H,CHEN Q.Flow dynamics and characterization of a cough[J].Indoor air,2009,19(6):517- 525.
[2] 林秀丽，张莹莹，柳静献.公交车内飞沫运移的数值模拟[J].东北大学学报(自然科学版),2021,42(5):726- 733.
[3] 张桉康，张华玲，刘鹏.普通病房飞沫污染物传播特性与评价[J].重庆大学学报，2021,44(3):82- 92.
[4] 汪新智，任安星，武永吉，等.基于欧拉-拉格朗日方法的携病毒飞沫扩散过程的数值模拟[J].自然杂志，2020,42(3):239- 248.
[5] YANG W,MARR L C.Dynamics of airborne influenza A viruses indoors and dependence on humidity[J].PLoS one,2011,6(6):e21481.
[6] MARR L C,TANG J W,VAN MULLEKOM J,et al.Mechanistic insights into the effect of humidity on airborne influenza virus survival,transmission and incidence[J].Journal of the royal society interface,2019,150:20180298.
[7] LI X D,SHANG Y D,YAN Y H,et al.Modelling of evaporation of cough droplets in inhomogeneous humidity fields using the multi-component Eulerian-Lagrangian approach[J].Building and environment,2018,128:68- 76.
[8] WEI J J,LI Y G.Enhanced spread of expiratory droplets by turbulence in a cough jet[J].Building and environment,2015,93:86- 96.
[9] GUPTA J K,LIN C H,CHEN Q.Flow dynamics and characterization of a cough[J].Indoor air,2009,19(6):517- 525.
Comparison between DPM simulation and experiment of human cough droplet transmission
Abstract: The evaporation model of the free-fall motion of a single droplet is verified by using the experimental data in the existing literature. The discrete phase model(DPM) is added to the evaporation model to simulate the indoor transmission characteristics and distribution of droplets ejected by human cough with time. The simulation results are in good agreement with the existing experimental results under different relative humidities. In the case of high relative humidity, the droplet evaporates slowly, which is beneficial to the gravity settlement of the droplet, resulting in a lower content of the virus droplet floating in the air, which helps to prevent the virus transmission.
Keywords: droplet; virus transmission; cough; evaporation; discrete phase model(DPM);
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