Numerical modeling of exhaled droplet nuclei dispersion and mixing in indoor environments.
Numerical modeling of exhaled droplet nuclei dispersion and mixing in indoor environments.
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DOI：
10.1016/j.jhazmat.2009.01.041
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发表时间：
2009-08-15
影响因子：
13.6
通讯作者：
Lai AC
中科院分区：
文献类型：
--
作者：
Mui KW;Wong LT;Wu CL;Lai AC
室内空气传播感染发病率的增加促使人们关注建筑环境中呼出液滴扩散和传输的研究。在这项研究中，一个源（即谁产生液滴的患者）和接收器（即一个敏感的对象以外的源）在机械通风的房间建模。在相对于源的两个方向下分析接收器对液滴核的暴露。选择两个具有不同发射速度的液滴核，0.1和10 μm，以代表仍可被吸入人体呼吸道的大呼气液滴。对充分混合和置换通风方案下的雾滴扩散和混合特性进行了数值计算和比较。结果表明，置换通风条件下的雾滴扩散和混合效果始终较差。在位移方案中也观察到非常低的浓度区域。对于这两种通风方案，如果液滴在面对面取向而不是面对面取向下喷射，则摄入剂量将大幅减少。使用工程策略，减少暴露的影响进行了简要讨论。
The increasing incidence of indoor airborne infections has prompted attention upon the investigation of expiratory droplet dispersion and transport in built environments. In this study, a source (i.e. a patient who generates droplets) and a receiver (i.e. a susceptible object other than the source) are modeled in a mechanically ventilated room. The receiver's exposure to the droplet nuclei is analyzed under two orientations relative to the source. Two droplet nuclei, 0.1 and 10 μm, with different emission velocities, are selected to represent large expiratory droplets which can still be inhaled into the human respiratory tracts. The droplet dispersion and mixing characteristics under well-mixed and displacement ventilation schemes are evaluated and compared numerically. Results show that the droplet dispersion and mixing under displacement ventilation is consistently poorer. Very low concentration regions are also observed in the displacement scheme. For both ventilation schemes, the intake dose will be reduced substantially if the droplets are emitted under the face-to-wall orientation rather than the face-to-face orientation. Implications of using engineering strategies for reducing exposure are briefly discussed.
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DOI：
10.1080/15459620590918466
发表时间：
2005-03-01
影响因子：
2
作者：
Nicas, M;Nazaroff, WW;Hubbard, A
通讯作者：
Hubbard, A
影响因子：
6.7
作者：
Feustel, HE
通讯作者：
Feustel, HE
影响因子：
5.8
作者：
Morawska, L.
通讯作者：
Morawska, L.
影响因子：
5
作者：
Lai, Alvin C. K.;Cheng, Y. C.
通讯作者：
Cheng, Y. C.
影响因子：
11.8
作者：
Tellier R
通讯作者：
Tellier R