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Matematyczne modelowanie rozprzestrzeniania się w atmosferze gazów cięższych od powietrza w terenie o skomplikowanej topografii, w pobliżu budynków i przeszkód terenowych
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In this article the capabilities of mathematical heavy gas atmospheric dispersion models to describe the dispersion of heavy gases in complex and obstructed terrain are presented. The models have been categorized into three main classes: phenomenological (empirical) models, intermediate (engineering) models and computational fluid dynamic (research) models. Each group of models is discussed separately. The general features of the models are discussed briefly. Examples of the heavy gas atmospheric dispersion models capable to treat the influence of non-flat and obstructed terrain on the heavy gas dispersion result from the work carried out in the European Union and in the US. No model simulating the heavy gas atmospheric dispersion over complex or obstructed terrain has been yet developed in Poland. The need for future work on the effects of complex and obstructed terrain on the heavy gas atmospheric dispersion is expressed. Future research in the area should include both experimental and modeling work. In the context of this paper future modeling work is worth considering in more detail. It seems that all the approaches to describe the heavy gas atmospheric dispersion over complex and obstructed terrain are worth further attention. This opinion is supported by the fact that these approaches are used in different types of heavy gas dispersion models, which in turn differ in applications. The simpler methods are introduced to the simpler heavy gas atmospheric dispersion models applied mainly in the routine calculations. The advanced techniques capable to describe the flow near complicated geometries are used in the sophisticated models applied mainly as a research tools.
W artykule przedstawiono możliwości uwzględnienia w modelach rozprzestrzeniania się w atmosferze gazów cięższych od powietrza opisu wpływu topografii, budynków i przeszkód terenowych na rozprzestrzenianie się gazów cięższych od powietrza. Modele podzielono na trzy grupy i wyróżniono: modele fenomenologiczne (empiryczne), modele pośrednie (inżynierskie) i modele obliczeniowej dynamiki płynów (badawcze). Każdą grupę modeli scharakteryzowano oddzielnie. Zasadnicze cechy modeli przedstawiono skrótowo. Przytoczone przykłady modeli rozprzestrzeniania się w atmosferze gazów cięższych od powietrza, uwzględniające wpływ topografii, budynków i przeszkód terenowych na przemieszczanie się gazów cięższych od powietrza, są rezultatem prac prowadzonych w krajach Unii Europejskiej i Stanach Zjednoczonych. W Polsce jak dotąd nie opracowano takiego modelu. W artykule zwrócono uwagę na konieczność prowadzenia dalszych prac nad wpływem topografii, budynków i przeszkód na rozprzestrzeniane się gazów cięższych od powietrza w atmosferze. Przyszłe badania winny uwzględniać zarówno prace pomiarowe jak i matematyczne modelowanie. W kontekście tej publikacji warto bardziej dokładnie rozważyć prace nad modelami. Wydaje się, że wszystkie podejścia stosowane przy opisie rozprzestrzeniania się gazów cięższych od powietrza w terenie o skomplikowanej topografii, w pobliżu budynków i przeszkód terenowych warte są dalszej uwagi. Opinię tę popiera fakt, że różne podejścia są stosowane w różnych rodzajach modeli gazów cięższych od powietrza, które z kolei mają różne zastosowania. Prostsze metody są wprowadzane do prostszych modeli gazów cięższych od powietrza stosowanych głównie w rutynowych obliczeniach. Zaawansowane techniki zdolne do opisu przepływu w pobliżu skomplikowanych geometrycznie obiektów są używane w wyrafinowanych modelach stosowanych głównie jako narzędzia badawcze.
Czasopismo
Rocznik
Tom
Strony
81--94
Opis fizyczny
bibliogr. 58 poz.
Twórcy
autor
- Warsaw University of Technology, Environmental Engineering Faculty ul. Nowowiejska 20, 00-653 Warsaw, Poland, maria@is.pw.edu.pl
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUS8-0002-0043