Comparison of Numerical Street Dispersion Models with Results from Wind Tunnel and Field Measurements

Ketzel, Matthias; Berkowicz, Ruwim; Lohmeyer, Achim

doi:10.1007/978-94-010-0932-4_39

Cited by 26 publications

(12 citation statements)

References 1 publication

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“…Model ten jest dedykowany do wykonywania obliczeń dyspersji zanieczyszczeń w kanionach ulicznych. Należy on do grupy modeli operacyjnych, charakteryzuje się wysoką reprezentatywnością uzyskiwanych wyników, niskimi kosztami obliczeniowymi oraz relatywnie niskimi wymaganiami w zakresie niezbędnych danych wejściowych [20][21][22][23]. W pracy obliczenia modelowe wykonano wyłącznie dla kanionu ulicznego alei Krasińskiego, wewnątrz którego prowadzone są również pomiary stężeń wybranych zanieczyszczeń powietrza, co pozwoliło zweryfikować uzyskiwane wyniki obliczeń.…”

Section: Wstępunclassified

Modelowanie Dyspersji Zanieczyszczeń Powietrza W Kanionie Ulicznym Na Przykładzie Alei Krasińskiego W Krakowie

Bogacki¹,

Rzeszutek²,

Heba³

2016

ZNPRzBiS

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Section: Wstępunclassified

Modelowanie Dyspersji Zanieczyszczeń Powietrza W Kanionie Ulicznym Na Przykładzie Alei Krasińskiego W Krakowie

Bogacki¹,

Rzeszutek²,

Heba³

2016

ZNPRzBiS

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“…Minimum vertical grid height was set to 50 cm, allowing a maximum domain height of 130 m, or 50 times the height of the containers (H). Ketzel et al (2000) showed that results from WinMISKAM V3.6 were more accurate when the height of the domain far exceeded the height of the obstacles (in their case increasing domain height from 5H to 25H times improved results substantially).…”

Section: Numerical Simulationsmentioning

confidence: 99%

Evaluation of results of a numerical simulation of dispersion in an idealised urban area for emergency response modelling

Donnelly

Lyons

Flassak

2009

Atmospheric Environment

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Donnelly, R.P. , Lyons, T.J. and Flassak, T. (2009) Evaluation of results of a numerical simulation of dispersion in an idealisedThis is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. M A N U S C R I P T A C C E P T E D ARTICLE IN PRESSEvaluation of results of a numerical simulation of dispersion in an idealised urban area for emergency response modelling. AbstractWinMISKAM is evaluated from an emergency response perspective. Comparisons are made between ground level concentrations observed during selected Mock Urban Setting Test (MUST) field trials and predictions generated by the model. The model was driven by 5 minute averaged on-site meteorological data, and used minimum grid spacing of 0.5 m in both the horizontal and vertical. The code was found to perform well, with 46% of all predictions (paired in time and space) and 83% of arc maxima predictions within a factor of two of observed concentrations. The model was found to perform better for neutral cases than stable cases with 27% of stable case predictions and 57% of neutral case predictions within a factor of two when compared in time and space.

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“…However, compared with the no-heating case, the intensity and vertical extent of the lower vortex increase and those of the upper vortex decrease because of the thermal upward motion near the windward building [12]. Figures 9,10,and 11 show the flow, the dimensionless concentration and the temperature field comparison between the isothermal, leeward-and windward-wall-heated cases, respectively. As a result of these differences between the flow and concentration fields for the three cases that have been described above, the average predicted deposition flux and the corresponding depollution efficiency of the two photocatalytic products under investigation varies considerably between the three cases.…”

Section: Resultsmentioning

confidence: 94%

“…These results were then interpolated to cover the whole range of wind directions from 0°to 360°w ith a step of 1°. Furthermore, by assuming a simple scaling of the numerically calculated concentrations with wind speed and emissions of 1/U [10,11], these interpolated NO x concentration results on both walls and for both scenarios were used to calculate NO x concentrations for a range of speeds from 1 m/s up to 10 m/s at a step of 1 m/s, for all wind directions. The results were then correlated with the corresponding field site NO x measurements based on the wind direction and wind speed for both scenarios, for the entire duration of the field campaign and comparison between the two was made.…”

Section: Resultsmentioning

confidence: 99%

Comparison of Numerical and Experimental Results for the Evaluation of the Depollution Effectiveness of Photocatalytic Coverings in Street Canyons

Moussiopoulos

Barmpas

Ossanlis

et al. 2007

Environ Model Assess

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Towards the aim of improving the air quality in the urban environment via the application of innovative TiO 2 based photocatalytic coverings, a field campaign took place within the frame of the EU PICADA project (http:// www.picada-project.com) to asses the expected depollution efficiency of such materials under realistic conditions. Furthermore, extensive numerical modeling was performed via the application of the RANS CFD code for microscale applications MIMO, in an effort to asses the sensitivity of the developing flow field and the corresponding dispersion mechanism and hence of the depollution efficiency of the PICADA products on a wide range of factors, with most notably the length of the street canyon, the thermal exchange between the heated street canyon walls and the air and the approaching wind direction. For the needs of the PICADA project a new, simple module had to be implemented into MIMO to be able to model the removal of NO x from a street canyon whose walls have been treated with a photocatalytic product. The model simulations results presented in this paper, show that MIMO is indeed capable of predicting the effectiveness of the photocatalytic products in question. At the same time, they reveal a strong dependence of the developing flow and concentration fields inside the field site street canyon configuration on most of the aforementioned factors with most notably the direction of the approaching wind.

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Comparison of Numerical Street Dispersion Models with Results from Wind Tunnel and Field Measurements

Cited by 26 publications

References 1 publication

Modelowanie Dyspersji Zanieczyszczeń Powietrza W Kanionie Ulicznym Na Przykładzie Alei Krasińskiego W Krakowie

Modelowanie Dyspersji Zanieczyszczeń Powietrza W Kanionie Ulicznym Na Przykładzie Alei Krasińskiego W Krakowie

Evaluation of results of a numerical simulation of dispersion in an idealised urban area for emergency response modelling

Comparison of Numerical and Experimental Results for the Evaluation of the Depollution Effectiveness of Photocatalytic Coverings in Street Canyons

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