Effect of supply/exhaust diffuser configurations on the contaminantdistribution in ultra clean environments: Eulerian and Lagrangianapproaches

tIn this research, the airflow pattern and particle dispersion in a contaminated full-scale cleanroom areinvestigated numerically using both Eulerian and Lagrangian approaches. Three different supply diffuserconfigurations namely (1) central, (2) horizontal and (3) vertical and three different exhaust grille con-figurations namely (4) vertical symmetric, (5) asymmetric and (6) horizontal symmetric are selected forthe analysis. The presented results reveal that the supply/exhaust openings arrangement has a significantinfluence on the particulate contaminant dispersion in the cleanrooms. The comparison of the above dif-ferent supply diffuser configurations shows that the vertical and horizontal supply diffuser configurationslead to a more escaped particles and less deposited particles on the room walls and installed workingtable in the room than the central one. It is also found that for different exhaust grille arrangements, theperformance of the ventilation system in the horizontal symmetric case is higher than asymmetric andvertical symmetric ones. At the same time, it is observed that the variations of contaminant concentrationin both Eulerian and Lagrangian approaches are almost the same. The results of the velocity and particleconcentration show good agreement with the available experimental data in the literature

CleanroomEulerian approachLagrangian approachParticleSupply/exhaust configurationsa