三种室内颗粒运动分布模拟方法的比较

Comparison of three simulation methods of indoor particle dispersion

用拉格朗日模型和滑移通量模型及将颗粒当作被动运输标量处理的方法对三维通风小室内颗粒的扩散分布进行了数值模拟,并将模拟结果与相关文献中的实验数据进行了对比。结果表明,用拉格朗日模型模拟的结果除了天花板和入口处附近外与实验数据吻合得都较好;用滑移通量模型模拟的结果在靠近天花板附近与实验数据吻合得较好,其他地方的模拟结果比实验数据稍小;将颗粒当作被动运输标量处理的模拟结果在0.3m以下位置与实验数据吻合得较好,而在靠近天花板附近与实验数据差别较大。

Numerically simulates the indoor particle dispersion in a three-dimensional ventilated room by the Lagrangian model, the drift flux model and the passive transport scalar treatment method. Compares the simulation results with the previously published experiment data. The results show that the simulation results by the Lagrangian model agree well with the experiment data except in the area near the ceiling and air inlet, and that those by the drift flux model agree well with the experiment data near the ceiling and are slightly smaller than the experiment data at the other locations, and that those by the passive transport scalar treatment method agree well with the experiment data in the area below 0.3 m and have larger difference with the experimental data near the ceiling.