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Numerical simulations for particle penetration through buildings cracks.

Author(s) : OLEA L. L., LIMAM K., COLDA I.

Summary

This study is in the frame of indoor air quality from the particle pollution point of view and its goal is to determine the particle penetration factor for different common types of leaks which deteriorate the filter capacity of building envelope. The most important parameters for the particle penetration are: the crack geometry, the pressure difference and the particles' diameter. CFD numerical simulations have been done for rectangular cracks with 0.2 and 1 mm height for 40 and 94 mm length, also changing the pressure difference between 4 Pa and 10 Pa. The penetration coefficient showed to be bigger than 90% for particle diameters less than 3 micrometers for cracks with 1 mm height regardless their length or pressure difference. For the diameter span from 3 to 8 micrometers the penetration factor varies from 90 to 15% depending on the pressure difference and only the particles bigger than 8 micrometers are completely filtrated by the studied cracks. The authors have found good agreement between the numerical simulations and bibliography.

Details

  • Original title: Numerical simulations for particle penetration through buildings cracks.
  • Record ID : 2008-2615
  • Languages: English
  • Source: Clima 2007. WellBeing Indoors. Proceedings of the 9th REHVA World Congress [CD-ROM + Abstract book].
  • Publication date: 2007/06/10

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