Experimental and CFD airflow studies of a cleanroom with special respect to air supply inlets

Whyte, W. , Hejab, M., Whyte, W.M. and Green, G. (2010) Experimental and CFD airflow studies of a cleanroom with special respect to air supply inlets. International Journal of Ventilation, 9(3), pp. 197-209. (doi: 10.1080/14733315.2010.11683880)

48056.pdf - Accepted Version



Investigations were carried out into the airflow in a non-unidirectional airflow cleanroom and its affect on the local airborne particle cleanliness The main influence was the method of air supply A supply inlet with no diffuser gave a pronounced downward jet flow and low levels of contamination below it, but poorer than average conditions in much of the rest of the room A 4-way diffuser gave much better air mixing and a more even airborne particle concentration throughout the cleanroom Other variables such as air inlet supply velocity, temperature difference between air supply and the room, and the release position of contamination also influenced the local airborne cleanliness A CFD analysis of airflow fields in a cleanroom was compared with measured values It was considered that a turbulent intensity of 6%, and a hydraulic diameter based on the actual size of the air inlet, should be used for the inlet boundary conditions and, when combined with a k-epsilon standard turbulence model, a reasonable prediction of the airflow and airborne particle concentration was obtained.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Whyte, Dr William and Green, Dr Graham
Authors: Whyte, W., Hejab, M., Whyte, W.M., and Green, G.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:International Journal of Ventilation
Publisher:Veetech Ltd.
ISSN (Online):2044-4044
Copyright Holders:Copyright © 2010 Veetech Ltd.
First Published:First published in International Journal of Ventilation 9(3):197-209
Publisher Policy:Reproduced with the permission of the publisher

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