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Statements

Subject Item
n2:RIV%2F61989100%3A27200%2F12%3A86081645%21RIV13-MZP-27200___
rdf:type
n12:Vysledek skos:Concept
dcterms:description
Low-speed wind tunnels have been used for simulation of a wide range of physical phenomena. One of their possible applications is the simulation of the motion and dispersion of gas pollutants of different densities from point, line or volume sources. If the modeled area, together with the source, is downscaled geometrically and pollutant release is limited (under unchanged atmospheric conditions), the plume of pollutants may exhibit characteristics different from those observed in real conditions. These differences include not only the shape of the plume, but also the ability of the plume to climb or descend in the atmosphere. Plume vertical motions are particularly important for the resulting plume motion and dispersion in the real atmosphere. The objective of the analysis is to test the effects of three selected physical parameters on the shape and motion of gas pollutant plumes. The three selected parameters include pollutant density, velocity of the flowing air that carries the pollutant, and model scale. In the study’s conclusion, several principles are presented that govern the behavior of gas pollutant plumes, particularly in immediate proximity to the source, when the above-mentioned parameters are modified. These principles can be used by investigators who prepare and conduct physical experiments of this kind, either at small scales in wind tunnels or at large scales in real conditions. All statements and conclusions are deduced analytically, especially from the Froude number equation, and demonstrated on the results of a numerical model. One of the world’s most sophisticated CFD codes—ANSYS Fluent 13.0—was used to demonstrate and visualize the problem. Low-speed wind tunnels have been used for simulation of a wide range of physical phenomena. One of their possible applications is the simulation of the motion and dispersion of gas pollutants of different densities from point, line or volume sources. If the modeled area, together with the source, is downscaled geometrically and pollutant release is limited (under unchanged atmospheric conditions), the plume of pollutants may exhibit characteristics different from those observed in real conditions. These differences include not only the shape of the plume, but also the ability of the plume to climb or descend in the atmosphere. Plume vertical motions are particularly important for the resulting plume motion and dispersion in the real atmosphere. The objective of the analysis is to test the effects of three selected physical parameters on the shape and motion of gas pollutant plumes. The three selected parameters include pollutant density, velocity of the flowing air that carries the pollutant, and model scale. In the study’s conclusion, several principles are presented that govern the behavior of gas pollutant plumes, particularly in immediate proximity to the source, when the above-mentioned parameters are modified. These principles can be used by investigators who prepare and conduct physical experiments of this kind, either at small scales in wind tunnels or at large scales in real conditions. All statements and conclusions are deduced analytically, especially from the Froude number equation, and demonstrated on the results of a numerical model. One of the world’s most sophisticated CFD codes—ANSYS Fluent 13.0—was used to demonstrate and visualize the problem.
dcterms:title
Physical Modelling of Gas Pollutant Motion in the Atmosphere Physical Modelling of Gas Pollutant Motion in the Atmosphere
skos:prefLabel
Physical Modelling of Gas Pollutant Motion in the Atmosphere Physical Modelling of Gas Pollutant Motion in the Atmosphere
skos:notation
RIV/61989100:27200/12:86081645!RIV13-MZP-27200___
n12:predkladatel
n13:orjk%3A27200
n3:aktivita
n4:P
n3:aktivity
P(SPII1A0/45/07)
n3:dodaniDat
n16:2013
n3:domaciTvurceVysledku
n19:5326753
n3:druhVysledku
n22:C
n3:duvernostUdaju
n9:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
158648
n3:idVysledku
RIV/61989100:27200/12:86081645
n3:jazykVysledku
n18:eng
n3:klicovaSlova
gravity force; inertial force; pollutant; gas; mathematical model; Froude number; CFD; Wind tunnel
n3:klicoveSlovo
n6:gravity%20force n6:Froude%20number n6:inertial%20force n6:gas n6:CFD n6:Wind%20tunnel n6:pollutant n6:mathematical%20model
n3:kontrolniKodProRIV
[025A3E9E0146]
n3:mistoVydani
Rijeka
n3:nazevZdroje
Advances in Modeling of Fluid Dynamics
n3:obor
n20:BK
n3:pocetDomacichTvurcuVysledku
1
n3:pocetStranKnihy
300
n3:pocetTvurcuVysledku
1
n3:projekt
n8:SPII1A0%2F45%2F07
n3:rokUplatneniVysledku
n16:2012
n3:tvurceVysledku
Zavila, Ondřej
s:numberOfPages
28
n17:doi
10.5772/47255
n10:hasPublisher
InTech
n21:isbn
978-953-51-0834-4
n11:organizacniJednotka
27200