密闭宿舍空间气溶胶颗粒扩散的数值模拟研究

Numerical simulation study on aerosol particle diffusion in enclosed dormitory spaces

采用欧拉-拉格朗日方法对咳嗽和打喷嚏释放出的含病毒气溶胶颗粒在密闭大学宿舍中的扩散过程开展了模拟研究,研究发现,咳嗽和打喷嚏工况下宿舍内气溶胶颗粒浓度分布具有明显的区别,人体口腔释放的初始气流速度、气溶胶浓度显著影响房间内的气溶胶浓度分布,室内气溶胶颗粒沉积与粒径大小直接相关,含病毒气溶胶释放源同侧的同学暴露风险明显高于非同侧同学,有必要采取戴口罩等防护措施,本研究工作可为密闭空间内呼吸道病毒暴露风险评估提供依据,为室内大气环境中气溶胶输运及环境保护提供指导和参考。

This paper uses the Euler-Lagrangian method to simulate the diffusion process of virus containing aerosol particles released from coughing and sneezing in confined dormitory space.The study found that there is a clear distinction in the concentration distribution of aerosol particles in dormitories under coughing and sneezing conditions.The initial airflow velocity and aerosol concentration released by the human oral cavity significantly affect the distribution of aerosol concentration in the room.The deposition of indoor virus containing aerosol particles is directly related to the particle size.The exposure risk of students on the same side of the virus containing aerosol release source is significantly higher than that of non-same side students.It is necessary to take protective measures such as wearing masks.This research can provide a basis for the risk assessment of respiratory virus exposure in enclosed spaces.It also provides guidance and reference for aerosol transport and environmental protection in indoor atmospheric environments.