Open AccessLarge‐eddy simulation of urban boundary‐layer flows by generating turbulent inflows from mesoscale meteorological simulations
Author(s) -
Nakayama Hiromasa,
Takemi Tetsuya,
Nagai Haruyasu
Publication year - 2012
Publication title -
atmospheric science letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.951
H-Index - 45
ISSN - 1530-261X
DOI - 10.1002/asl.377
Subject(s) - mesoscale meteorology , meteorology , environmental science , large eddy simulation , typhoon , boundary layer , turbulence , planetary boundary layer , wind speed , atmospheric sciences , climatology , geology , mechanics , geography , physics
Abstract We propose an approach to generate turbulent flows by using mesoscale meteorological simulations in order to conduct building‐resolving large‐eddy simulations (LESs) of boundary‐layer flows over urban areas under realistic meteorological conditions. The urban surface geometry was explicitly represented in the LES model. This approach was applied for a strong wind event in Tokyo owing to the landfall of a major typhoon whose intensity and track were well reproduced in the meteorological simulation. The observed ranges of wind fluctuations and gust factors and significant decelerations of wind speeds within the urban canopy layer were successfully represented in the LES. Copyright © 2012 Royal Meteorological Society