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Investigation of Turbulent Analysis Methods for CFD of Gas Dispersion Around a Building
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  • Journal title : Fire Science and Engineering
  • Volume 29, Issue 5,  2015, pp.42-50
  • Publisher : Korea Institute of Fire Science and Engineering
  • DOI : 10.7731/KIFSE.2015.29.5.042
 Title & Authors
Investigation of Turbulent Analysis Methods for CFD of Gas Dispersion Around a Building
Ko, Min Wook; Oh, Chang Bo; Han, Youn Shik; Do, Kyu Hyung;
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 Abstract
Three simulation approaches for turbulence were applied for the computation of propane dispersion in a simplified real-scale urban area with one building:, Large Eddy Simulation (LES), Detached Eddy Simulation (DES), and Unsteady Reynolds Averaged Navier-Stokes (RANS). The computations were performed using FLUENT 14, and the grid system was made with ICEM-CFD. The propane distribution depended on the prediction performance of the three simulation approaches for the eddy structure around the building. LES and DES showed relatively similar results for the eddy structure and propane distribution, while the RANS prediction of the propane distribution was unrealistic. RANS was found to be inappropriate for computation of the gas dispersion process due to poor prediction performance for the unsteady turbulence. Considering the computational results and cost, DES is believed to be the optimal choice for computation of the gas dispersion in a real-scale space.
 Keywords
Propane;Gas dispersion;Large eddy simulation (LES);Detached eddy simulation (DES);Reynolds averaged navier stokes (RANS);Computational fluid dynamics (CFD);
 Language
Korean
 Cited by
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