Large-Eddy Simulation of Plume Dispersion in the Central District of Oklahoma City by Coupling with a Mesoscale Meteorological Simulation Model and Observation
Contaminant gas dispersion within an urban area resulting from accidental or intentional release is of great concern to public health and social security. When estimating plume dispersion in a built-up urban area under real meteorological conditions by computational fluid dynamics (CFD), a crucial i...
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doaj-1704f88902fe47f3b2220a8367a42acc2021-07-23T13:30:44ZengMDPI AGAtmosphere2073-44332021-07-011288988910.3390/atmos12070889Large-Eddy Simulation of Plume Dispersion in the Central District of Oklahoma City by Coupling with a Mesoscale Meteorological Simulation Model and ObservationHiromasa Nakayama0Tetsuya Takemi1Toshiya Yoshida2Japan Atomic Energy Agency, 2-4, Shirakatashirane, Tokai-mura, Naka-gun, Ibaraki 319-1195, JapanDisaster Prevention Research Institute, Kyoto University, Kyoto 611-0011, JapanJapan Atomic Energy Agency, 2-4, Shirakatashirane, Tokai-mura, Naka-gun, Ibaraki 319-1195, JapanContaminant gas dispersion within an urban area resulting from accidental or intentional release is of great concern to public health and social security. When estimating plume dispersion in a built-up urban area under real meteorological conditions by computational fluid dynamics (CFD), a crucial issue is how to prescribe the input conditions. There are typically two approaches: using the outputs of a mesoscale meteorological simulation (MMS) model and meteorological observations (OBS). However, the influences of the different approaches on the simulation results have not been fully demonstrated. In this study, we conducted large-eddy simulations (LESs) of plume dispersion in the urban central district of Oklahoma City under real meteorological conditions by coupling with a MMS model and OBS obtained at a single stationary point, and evaluated the two different coupling simulations in comparison with the field experiments. The LES–MMS coupling showed better performance than the LES–OBS one. The latter one also showed a reasonable performance comparable to the acceptance criteria on the model prediction within a factor of two of the experimental data. These facts indicate that the approach using observations at a single stationary point still has enough potential to drive CFD models for plume dispersion under real meteorological conditions.https://www.mdpi.com/2073-4433/12/7/889large-eddy simulationplume dispersionurban areacoupling simulationmesoscale meteorological simulation modelmeteorological observation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hiromasa Nakayama Tetsuya Takemi Toshiya Yoshida |
spellingShingle |
Hiromasa Nakayama Tetsuya Takemi Toshiya Yoshida Large-Eddy Simulation of Plume Dispersion in the Central District of Oklahoma City by Coupling with a Mesoscale Meteorological Simulation Model and Observation Atmosphere large-eddy simulation plume dispersion urban area coupling simulation mesoscale meteorological simulation model meteorological observation |
author_facet |
Hiromasa Nakayama Tetsuya Takemi Toshiya Yoshida |
author_sort |
Hiromasa Nakayama |
title |
Large-Eddy Simulation of Plume Dispersion in the Central District of Oklahoma City by Coupling with a Mesoscale Meteorological Simulation Model and Observation |
title_short |
Large-Eddy Simulation of Plume Dispersion in the Central District of Oklahoma City by Coupling with a Mesoscale Meteorological Simulation Model and Observation |
title_full |
Large-Eddy Simulation of Plume Dispersion in the Central District of Oklahoma City by Coupling with a Mesoscale Meteorological Simulation Model and Observation |
title_fullStr |
Large-Eddy Simulation of Plume Dispersion in the Central District of Oklahoma City by Coupling with a Mesoscale Meteorological Simulation Model and Observation |
title_full_unstemmed |
Large-Eddy Simulation of Plume Dispersion in the Central District of Oklahoma City by Coupling with a Mesoscale Meteorological Simulation Model and Observation |
title_sort |
large-eddy simulation of plume dispersion in the central district of oklahoma city by coupling with a mesoscale meteorological simulation model and observation |
publisher |
MDPI AG |
series |
Atmosphere |
issn |
2073-4433 |
publishDate |
2021-07-01 |
description |
Contaminant gas dispersion within an urban area resulting from accidental or intentional release is of great concern to public health and social security. When estimating plume dispersion in a built-up urban area under real meteorological conditions by computational fluid dynamics (CFD), a crucial issue is how to prescribe the input conditions. There are typically two approaches: using the outputs of a mesoscale meteorological simulation (MMS) model and meteorological observations (OBS). However, the influences of the different approaches on the simulation results have not been fully demonstrated. In this study, we conducted large-eddy simulations (LESs) of plume dispersion in the urban central district of Oklahoma City under real meteorological conditions by coupling with a MMS model and OBS obtained at a single stationary point, and evaluated the two different coupling simulations in comparison with the field experiments. The LES–MMS coupling showed better performance than the LES–OBS one. The latter one also showed a reasonable performance comparable to the acceptance criteria on the model prediction within a factor of two of the experimental data. These facts indicate that the approach using observations at a single stationary point still has enough potential to drive CFD models for plume dispersion under real meteorological conditions. |
topic |
large-eddy simulation plume dispersion urban area coupling simulation mesoscale meteorological simulation model meteorological observation |
url |
https://www.mdpi.com/2073-4433/12/7/889 |
work_keys_str_mv |
AT hiromasanakayama largeeddysimulationofplumedispersioninthecentraldistrictofoklahomacitybycouplingwithamesoscalemeteorologicalsimulationmodelandobservation AT tetsuyatakemi largeeddysimulationofplumedispersioninthecentraldistrictofoklahomacitybycouplingwithamesoscalemeteorologicalsimulationmodelandobservation AT toshiyayoshida largeeddysimulationofplumedispersioninthecentraldistrictofoklahomacitybycouplingwithamesoscalemeteorologicalsimulationmodelandobservation |
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1721289391403433984 |