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Title: Development of LOcal-scale High-resolution atmospheric DIspersion Model using Large-Eddy Simulation. Part 5: detailed simulation of turbulent flows and plume dispersion in an actual urban area under real meteorological conditions
Authors: Nakayama, Hiromasa
Takemi, Tetsuya
Nagai, Haruyasu
Author's alias: 竹見, 哲也
Keywords: local-scale high-resolution atmospheric dispersion model
nuclear emergency response system
large-eddy simulation
meso-scale meteorological model
coupling simulation
turbulent flows
plume dispersion
Issue Date: 1-Aug-2015
Publisher: Taylor and Francis Ltd.
Journal title: Journal of Nuclear Science and Technology
Volume: 53
Issue: 6
Start page: 887
End page: 908
Abstract: We have developed a LOcal-scale High-resolution atmospheric DIspersion Model using Large-Eddy Simulation (LOHDIM-LES) to assess the safety at nuclear facilities and to respond to emergency situations resulting from accidental or deliberate releases of radioactive materials (e.g., a terrorist attack in an urban area). In parts 1–4, LESs of turbulent flows and plume dispersion over a flat terrain, around an isolated building, within building arrays with different obstacle densities, and within an actual urban area were performed, which showed the basic performance comparable to wind tunnel experimental technique. In this study, we extend the LOHDIM-LES to turbulent flows and plume dispersion in an actual urban area under real meteorological conditions by coupling with a meso-scale meteorological simulation model. The LES results of wind speed, wind direction, and concentration values are generally reproduced well. It is concluded that our coupling approach between LES and meso-scale meteorological models is effective in detailed simulations of turbulent flows and plume dispersion in urban areas under real meteorological conditions.
Rights: This is an Accepted Manuscript of an article published by Taylor & Francis in 'Journal of Nuclear Science and Technology' on 26 Aug 2015, available online: http://www.tandfonline.com/10.1080/00223131.2015.1078262.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/217984
DOI(Published Version): 10.1080/00223131.2015.1078262
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