Effect of supply/exhaust diffuser configurations on the contaminant distribution in ultra clean environments: Eulerian and Lagrangian approaches
Effect of supply/exhaust diffuser configurations on the contaminant distribution in ultra clean environments: Eulerian and Lagrangian approaches
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DOI：
10.1016/j.enbuild.2016.06.028
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发表时间：
2016-09
影响因子：
6.7
通讯作者：
J. Eslami;A. Abbassi;M. Saidi;M. Bahrami
中科院分区：
文献类型：
--
作者：
J. Eslami;A. Abbassi;M. Saidi;M. Bahrami
本文采用欧拉和拉格朗日两种方法对污染全尺寸洁净室内的气流模式和颗粒分散进行了数值研究。选择三种不同的送风扩散器配置(1)中央、(2)水平和(3)垂直；选择三种不同的排气格栅配置(4)垂直对称、(5)不对称和(6)水平对称进行分析。研究结果表明，送风/排风孔的布置方式对颗粒污染物在洁净室内的扩散有显著影响。对上述不同送风扩散器配置的比较表明，垂直送风扩散器和水平送风扩散器配置比中央送风扩散器配置导致室内壁面和安装工作台上逸出颗粒较多，沉积颗粒较少。研究还发现，对于不同的排风格栅布置方式，水平对称的排风系统性能高于不对称和垂直对称的排风系统。同时，我们观察到欧拉法和拉格朗日法中污染物浓度的变化几乎是相同的。速度和颗粒浓度的计算结果与文献中已有的实验数据吻合较好。
In this research, the airflow pattern and particle dispersion in a contaminated full-scale cleanroom are investigated numerically using both Eulerian and Lagrangian approaches. Three different supply diffuser configurations namely (1) central, (2) horizontal and (3) vertical and three different exhaust grille configurations namely (4) vertical symmetric, (5) asymmetric and (6) horizontal symmetric are selected for the analysis. The presented results reveal that the supply/exhaust openings arrangement has a significant influence on the particulate contaminant dispersion in the cleanrooms. The comparison of the above different supply diffuser configurations shows that the vertical and horizontal supply diffuser configurations lead to a more escaped particles and less deposited particles on the room walls and installed working table in the room than the central one. It is also found that for different exhaust grille arrangements, the performance of the ventilation system in the horizontal symmetric case is higher than asymmetric and vertical symmetric ones. At the same time, it is observed that the variations of contaminant concentration in both Eulerian and Lagrangian approaches are almost the same. The results of the velocity and particle concentration show good agreement with the available experimental data in the literature.