室内空气环境VOCs浓度场的CFD仿真分析

为了确定实验室内污染物浓度的分布状况，运用CFD仿真方法对固定排风量下某实验室内VOCs的浓度场分布进行了建模和数值仿真，实现了结果的可视化，并对仿真结果进行了分析和实地监测验证，除门窗附近几个点外，实验室内VOCs浓度场分布的实地监测值与仿真值在变化趋势上是比较一致的．整个室内VOCs浓度场的分布主要受排气系统的影响，空间分布上表现为随高度增加浓度值逐渐升高．通过CFD仿真研究，快速地给出室内流场和浓度场的详细信息，为进一步研究改变排风系统情况、不同排风量、移动污染源位置等多种条件下室内空气环境污染物浓度场分布情况提供了方法和理论依据．

CFD simulation and analysis for VOCs concentration field in indoor environment

In order to determine the concentration distribution of pollutants in a laboratory room, CFD simulation method was used to model and simulate the VOCs concentration field under certain exhaust flow flux, and the results showed the simulated values showed same trend as the test data of the contamination concentration indoor room, except for data obtained near the door and the window. The VOCs concentration field of lab was mainly influenced by the ventilation systems and the spatial distribution concentration values gradually increased with the increasing height. Through CFD simulation study, detailed information of the indoor concentration field and flow field can be rapidly given.