TY - JOUR
T1 - Evaluation of turbulent length scale within urban canopy layer based on LES data
AU - Okaze, T.
AU - Ono, A.
AU - Mochida, A.
AU - Kannuki, Y.
AU - Watanabe, S.
N1 - Funding Information:
The authors are grateful for the support provided by the Grant-in-Aid for Challenging Exploratory Research (Grant no. 24656330 ) and Grant-in-Aid for Scientific Research (C) (Grant no. 26420578 ).
Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2015/9/1
Y1 - 2015/9/1
N2 - In this study, a new evaluation method was developed for the turbulent length scale using large-eddy simulation (LES) data. An LES was performed on the wind flow over urban-like roughness elements with periodic boundary conditions to investigate the influence of urban configurations on turbulent characteristics within the urban canopy layer. Spatial distributions of the grid scale turbulent kinetic energy (kGS) and mean strain rate (Sij) were obtained from the LES results, and the value of the turbulent length scale was estimated from the kGS and Sij values. A modeling approach previously proposed by the authors to reproduce the influence of urban configurations on the turbulent flow field within the canopy layer in a Reynolds-averaged Navier-Stokes simulation was examined by using the spatial distribution of the turbulent length scale provided by the LES data.
AB - In this study, a new evaluation method was developed for the turbulent length scale using large-eddy simulation (LES) data. An LES was performed on the wind flow over urban-like roughness elements with periodic boundary conditions to investigate the influence of urban configurations on turbulent characteristics within the urban canopy layer. Spatial distributions of the grid scale turbulent kinetic energy (kGS) and mean strain rate (Sij) were obtained from the LES results, and the value of the turbulent length scale was estimated from the kGS and Sij values. A modeling approach previously proposed by the authors to reproduce the influence of urban configurations on the turbulent flow field within the canopy layer in a Reynolds-averaged Navier-Stokes simulation was examined by using the spatial distribution of the turbulent length scale provided by the LES data.
KW - Canopy model
KW - Eddy viscosity
KW - Large-eddy simulation
KW - Turbulent length scale
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U2 - 10.1016/j.jweia.2014.11.016
DO - 10.1016/j.jweia.2014.11.016
M3 - Article
AN - SCOPUS:84939485492
SN - 0167-6105
VL - 144
SP - 79
EP - 83
JO - Journal of Wind Engineering and Industrial Aerodynamics
JF - Journal of Wind Engineering and Industrial Aerodynamics
ER -
