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首页> 美国卫生研究院文献>Elsevier Public Health Emergency Collection >Experimental measurements and large eddy simulation of expiratory droplet dispersion in a mechanically ventilated enclosure with thermal effects
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Experimental measurements and large eddy simulation of expiratory droplet dispersion in a mechanically ventilated enclosure with thermal effects

机译：机械通风的通风箱中呼气液滴扩散的实验测量和大涡模拟具有热效应

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摘要

Understanding of droplet transport in indoor environments with thermal effects is very important to comprehend the airborne pathogen infection through expiratory droplets. In this work, a well-resolved Large Eddy Simulation (LES) was performed to compute the concentration profiles of monodisperse aerosols in non-isothermal low-Reynolds turbulent flow taking place in an enclosed environment. Good care was taken to ensure that the main dynamical features of the continuous phase were captured by the present LES. The particle phase was studied in both Lagrangian and Eulerian frameworks. Steady temperature and velocity were measured prior to droplet emission. Evolution of aerosol concentration was measured by a particle counter. Results of the present LES were to compare reasonably well with the experimental findings for both phases.
机译：了解具有热效应的室内环境中的飞沫运输对于理解通过呼气飞沫传播的空气传播的病原体感染非常重要。在这项工作中，进行了一个很好解析的大涡模拟（LES），以计算在密闭环境中发生的非等温低雷诺湍流中单分散气溶胶的浓度分布。采取了谨慎措施，以确保当前的LES能够捕获连续相的主要动力学特征。在拉格朗日和欧拉框架中都研究了粒子相。在液滴发射之前测量稳定的温度和速度。通过粒子计数器测量气溶胶浓度的变化。当前LES的结果应与两个阶段的实验结果进行合理比较。

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