Počet záznamů: 1
The impact of atmospheric boundary layer, opening configuration and presence of animals on the ventilation of a cattle barn
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SYSNO ASEP 0524010 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The impact of atmospheric boundary layer, opening configuration and presence of animals on the ventilation of a cattle barn Tvůrce(i) Nosek, Štěpán (UT-L) RID, ORCID
Kluková, Zuzana (UT-L) ORCID
Jakubcová, Michala (UT-L)
Qianying, Y. (DE)
Janke, D. (DE)
Demeyer, P. (BE)
Jaňour, Zbyněk (UT-L) RID, ORCIDČíslo článku 104185 Zdroj.dok. Journal of Wind Engineering and Industrial Aerodynamics. - : Elsevier - ISSN 0167-6105
Roč. 201, June (2020)Poč.str. 12 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova air pollution ; atmospheric boundary layer ; livestock building ; natural ventilation ; OPD ; TR-PIV ; wind tunnel Vědní obor RIV DG - Vědy o atmosféře, meteorologie Obor OECD Meteorology and atmospheric sciences CEP LTC18070 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Omezený přístup Institucionální podpora UT-L - RVO:61388998 UT WOS 000535697200008 EID SCOPUS 85083172276 DOI 10.1016/j.jweia.2020.104185 Anotace Naturally ventilated livestock buildings (NVLB) represent one of the most significant sources of ammonia emissions. However, even the dispersion of passive gas in an NVLB is still not well understood. In this paper, we present a detailed investigation of passive pollutant dispersion in a model of a cattle barn using the wind tunnel experiment method. We simulated the pollution of the barn by a ground-level planar source. We used the time-resolved particle image velocimetry (TR-PIV) and the fast flame ionisation detector (FFID) to study the flow and dispersion processes at high spatial and temporal resolution. We employed the Proper Orthogonal Decomposition (POD) and Oscillating Patterns Decomposition (OPD) methods to detect the coherent structures of the flow. The results show that the type of atmospheric boundary layer (ABL) and sidewall opening height have a significant impact on the pollutant dispersion in the barn, while the presence of animals and doors openings are insignificant under conditions of winds perpendicular to the sidewall openings. We found that the dynamic coherent structures, developed by the Kelvin-Helmholtz instability, contribute to the pollutant transport in the barn. We demonstrate that in any of the studied cases the pollutant was not well mixed within the barn and that a significant underestimation (up to by a factor 3) of the barn ventilation might be obtained using, e.g. tracer gas method. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2021 Elektronická adresa https://www.journals.elsevier.com/journal-of-wind-engineering-and-industrial-aerodynamics
Počet záznamů: 1