Berrouk Abdallah S, Lai Alvin C K, Cheung Albert C T, Wong S L
Chemical Engineering Program, The Petroleum Institute, United Arab Emirates.
Department of Building and Construction, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
Build Environ. 2010 Feb;45(2):371-379. doi: 10.1016/j.buildenv.2009.06.016. Epub 2009 Jun 26.
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.
理解热效应作用下室内环境中的液滴传输对于认识通过呼出飞沫传播的空气传播病原体感染非常重要。在这项工作中，进行了高分辨率大涡模拟（LES），以计算在封闭环境中发生的非等温低雷诺数湍流中单一分散气溶胶的浓度分布。我们非常小心地确保当前的大涡模拟能够捕捉到连续相的主要动力学特征。在拉格朗日和欧拉框架下对颗粒相进行了研究。在液滴发射之前测量了稳定的温度和速度。通过粒子计数器测量气溶胶浓度的演变。当前大涡模拟的结果与两个阶段的实验结果相当吻合。
