Computational investigation of prolonged airborne dispersion of novel coronavirus-laden droplets.
Computational investigation of prolonged airborne dispersion of novel coronavirus-laden droplets.
复制标题
新型冠状病毒液滴长时间空中扩散的计算研究。
DOI：
10.1016/j.jaerosci.2021.105769
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发表时间：
2021-06
影响因子：
4.5
通讯作者：
Kim M
中科院分区：
文献类型：
--
作者：
Yamakawa M;Kitagawa A;Ogura K;Chung YM;Kim M
我们进行了高精度的数值模拟，以研究新型冠状病毒携带的液滴在教室空气中的长时间扩散。一名教师咳嗽时将大约10,900个携带病毒的液滴释放到空气中，并通过数值模拟跟踪了90分钟。在一间教室里，老师站在多名学生面前。为了估计病毒对学生的传播，我们考虑了新型冠状病毒的特征，如病毒的半衰期。模拟结果显示，当教室通风出口流量较低(即4.3和8.6亿厘米/S)时，携带病毒的飞沫在空气中长期传播的风险很高。45分钟和90分钟后，教师咳嗽产生的空气携带病毒飞沫的残留率分别为40%和15%。结果显示，学生可以通过与老师保持较大距离(5.5米)来避免接触到携带病毒的飞沫，这是目前建议的社交距离规则的两倍多。这项研究的结果为在课堂上制定新的保护计划提供了指导方针，以防止携带病毒的飞沫通过空气传播给学生。
We have performed highly accurate numerical simulations to investigate prolonged dispersion of novel coronavirus-laden droplets in classroom air. Approximately 10,900 virus-laden droplets were released into the air by a teacher coughing and tracked for 90 min by numerical simulations. The teacher was standing in front of multiple students in a classroom. To estimate viral transmission to the students, we considered the features of the novel coronavirus, such as the virus half-life. The simulation results revealed that there was a high risk of prolonged airborne transmission of virus-laden droplets when the outlet flow of the classroom ventilation was low (i.e., 4.3 and 8.6 cm/s). The rates of remaining airborne virus-laden droplets produced by the teacher coughing were 40% and 15% after 45 and 90 min, respectively. The results revealed that students can avoid exposure to the virus-laden droplets by keeping a large distance from the teacher (5.5 m), which is more than two times farther than the currently suggested social distancing rules. The results of this study provide guidelines to set a new protection plan in the classroom to prevent airborne transmission of virus-laden droplets to students.
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影响因子：
4.5
作者：
Shao, Siyao;Zhou, Dezhi;Hong, Jiarong
通讯作者：
Hong, Jiarong
DOI：
10.1137/0913035
发表时间：
1992-03-01
期刊：
SIAM JOURNAL ON SCIENTIFIC AND STATISTICAL COMPUTING
影响因子：
--
作者：
VANDERVORST, HA
通讯作者：
VANDERVORST, HA
影响因子：
2.5
作者：
YOON, S;JAMESON, A
通讯作者：
JAMESON, A
计算流体动力学研究替代通风配置对模拟空气传播感染隔离室中传染性咳嗽气溶胶可能流动路径的影响。
影响因子：
1.9
作者：
Thatiparti DS;Ghia U;Mead KR
通讯作者：
Mead KR
影响因子：
3.7
作者：
Asadi, Sima;Wexler, Anthony S.;Ristenpart, William D.
通讯作者：
Ristenpart, William D.