World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Large-eddy Simulation of Turbulent Winds During the Fukushima Daiichi Nuclear Power Plant Accident by Coupling with a Meso-scale Meteorological Simulation Model : Volume 12, Issue 1 (17/06/2015)

By Nakayama, H.

Click here to view

Book Id: WPLBN0003972501
Format Type: PDF Article :
File Size: Pages 7
Reproduction Date: 2015

Title: Large-eddy Simulation of Turbulent Winds During the Fukushima Daiichi Nuclear Power Plant Accident by Coupling with a Meso-scale Meteorological Simulation Model : Volume 12, Issue 1 (17/06/2015)  
Author: Nakayama, H.
Volume: Vol. 12, Issue 1
Language: English
Subject: Science, Advances, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Takemi, T., Nakayama, H., & Nagai, H. (2015). Large-eddy Simulation of Turbulent Winds During the Fukushima Daiichi Nuclear Power Plant Accident by Coupling with a Meso-scale Meteorological Simulation Model : Volume 12, Issue 1 (17/06/2015). Retrieved from http://www.ebooklibrary.org/


Description
Description: Japan Atomic Energy Agency, Ibaraki, Japan. A significant amount of radioactive material was accidentally discharged into the atmosphere from the Fukushima Dai-ichi Nuclear Power Plant from 12 March 2011, which produced high contaminated areas over a wide region in Japan. In conducting regional-scale atmospheric dispersion simulations, the computer-based nuclear emergency response system WSPEEDI-II developed by Japan Atomic Energy Agency was used. Because this system is driven by a meso-scale meteorological (MM) model, it is difficult to reproduce small-scale wind fluctuations due to the effects of local terrain variability and buildings within a nuclear facility that are not explicitly represented in MM models. In this study, we propose a computational approach to couple an LES-based CFD model with a MM model for detailed simulations of turbulent winds with buoyancy effects under real meteorological conditions using turbulent inflow technique. Compared to the simple measurement data, especially, the 10 min averaged wind directions of the LES differ by more than 30 degrees during some period of time. However, distribution patterns of wind speeds, directions, and potential temperature are similar to the MM data. This implies that our coupling technique has potential performance to provide detailed data on contaminated area in the nuclear accidents.

Summary
Large-eddy simulation of turbulent winds during the Fukushima Daiichi Nuclear Power Plant accident by coupling with a meso-scale meteorological simulation model

Excerpt
Goldstein, D., Handler, R., and Sirovich, L.: Modeling a no-slip flow boundary with an external force field, J. Comput. Phys., 105, 354–366, 1993.; Hong, S.-Y. and Lim, J.-O. J.: The WRF single-moment 6-class microphysics scheme (WSM6), J. Kor. Meteorol. Soc., 42, 129–151, 2006.; Janjic, Z. I.: Nonsingular implementation of the Mellor-Yamada level 2.5 scheme in the NCEP Meso model, NCEP Office Note, 437, 61 pp., 2002.; Kataoka, H. and Mizuno, M.: Numerical flow computation around aeroelastic 3D square cylinder using inflow turbulence, Wind Struct., 5, 379–392, 2002.; Katata, G., Ota, M., Terada, H., Chino, M., and Nagai, H.: Atmospheric discharge and dispersion of radionuclides during the Fukushima Dai-ichi Nuclear Power Plant accident. Part I: Source term estimation and local-scale atmospheric dispersion in early phase of the accident, J. Environ. Radioact., 109, 103–113, 2012.; Michioka, T., Sato, A., and Sada, K.: Large-eddy simulation coupled to meso-scale meteorological model for gas dispersion in an urban district, Atmos. Environ., 75, 153–162, 2013.; Nakayama, H., Takemi, T., and Nagai, H.: Large-eddy simulation of urban boundary-layer flows by generating turbulent inflows from mesoscale meteorological simulations, Atmos. Sci. Lett., 13, 180–186, 2012.; Nakayama, H., Leitl, B., Harms, F., and Nagai, H.: Development of local-scale high-resolution atmospheric dispersion model using large-eddy simulation Part 4: turbulent flows and plume dispersion in an actual urban area, J. Nucl. Soc. Technol., 51, 628–638, 2014.; Nakayama, H., Takemi, T., and Nagai, H.: 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, submitted to J. Nucl. Soc. Technol., 2015.; Skamarock, W. C., Klemp, J. B., Dudhia, J., Gill, D. O., Barker, D. M., Duda, M. G., Huang, X., Wang, W., and Powers, J. G.: A description of the Advanced Research WRF Version 3, NCAR Tech. Note, NCAR/TN-475+STR, 1 pp., 2008.; Smagorinsky, J.: General circulation experiments with the primitive equations, Mon. Weather Rev., 91, 3, 99–164, 1963.; TEPCO, Tokyo Electric Power Company. Additional Monitoring Data at Fukushima Daiichi Nuclear Power Station, available at: http://www.tepco.co.jp/en/press/corp-com/release/ 11052811-e.html (last access: 04 June 2015), 2011.; Wyszogrodzki, A., Miao, S., and Chen, F.: Evaluation of the coupling between mesoscale-WRF and LES-EULAG models for simulating fine-scale urban dispersion, Atmos Res., 118, 324–345, 2012.

 

Click To View

Additional Books


  • A Study of the 1 and 2 January 2010 Sea-... (by )
  • Mesoscale Modeling of Lake Effect Snow O... (by )
  • Hydrologic Balance Estimation Using Gis ... (by )
  • Soil Moisture Initialization Effects in ... (by )
  • Quality Control of 10-min Air Temperatur... (by )
  • An Overview of the Phenological Observat... (by )
  • Modelling Static 3-d Spatial Background ... (by )
  • Preliminary Step Towards Comparing Large... (by )
  • High Resolution Modelling of Wind Fields... (by )
  • Newest Developments of Acmant : Volume 6... (by )
  • Development of Adaptive Iwrm Options for... (by )
  • Comparative Verification of Different No... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.