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CONTRIBUTION EXPERIMENTALE ET NUMERIQUE A L'ETUDE DU DEPOT DES PARTICULES FINES DANS LES CAVITES VENTILEES

Abstract : Our contribution to particle pollution studies brings at the same time an experimental and a numerical complement to the existing knowledge on indoor air quality in buildings. At the beginning we made a state of art of previous studies on fine particle dispersion and deposition in ventilated cavities. Our experimental studies were dedicated to carrying out measurements on particle deposition in two test chambers in 1 to 4 size scale relation. Our contribution highlighted the dispersion of bibliographic results and the comparison difficulty between results coming from different scale chambers. In each case, we studied simultaneously the particle deposition in function of ventilation strategy and of air change rate. During a more detailed numerical analysis, first we determined the fluid flow pattern and then particle dispersion and deposition in the ventilated cavity. At the beginning we used a Lagrangian numerical code developed in our laboratory where we integrated Brownian diffusion effects, but this approach becomes rapidly too expensive thus ineffective for simulations concerning particles smaller than 0.5 µm diameter. For this reason we tested an Eulerian approach which seemed to be more adapted for submicron sized particles. In fact, the calculated values in comparison with measured ones prove a better performance of the Eulerian method for this particle size interval.
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https://tel.archives-ouvertes.fr/tel-00270909
Contributor : Timea Dénes Bejat <>
Submitted on : Monday, April 7, 2008 - 6:08:46 PM
Last modification on : Thursday, February 9, 2017 - 4:58:38 PM
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Timea Dénes Bejat. CONTRIBUTION EXPERIMENTALE ET NUMERIQUE A L'ETUDE DU DEPOT DES PARTICULES FINES DANS LES CAVITES VENTILEES. Sciences de l'ingénieur [physics]. Université de La Rochelle, 2007. Français. ⟨tel-00270909⟩

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