TY - JOUR
T1 - EFFECT OF MOMENTUM PROVISION IN COMPUTATIONAL FLUID DYNAMICS ON TURBULENT STATISTICS IN URBAN BOUNDARY LAYER
AU - Sanemitsu, Toshiki
AU - Ikegaya, Naoki
AU - Hirose, Chiyoko
AU - Tanimoto, Jun
AU - Hagishima, Aya
N1 - Publisher Copyright:
© 2022 Architectural Institute of Japan. All rights reserved.
PY - 2022
Y1 - 2022
N2 - To reproduce homogeneous flow fields above urban-like turbulent boundary layers in computational fluid dynamics (CFD), numerous CFDs with a limited numerical domain employ periodic boundary conditions in both lateral directions with artificial momentum provision to maintain airflows. Although such artificial momentum sources are clearly different from the momentum provision in windtunnel experiments, the effects of these numerical conditions on the airflow in the boundary layer are not well studied. In this paper, therefore, we investigate how the momentum provision differentiates the vertical Reynolds stress and turbulent kinetic energy profiles using large-eddy simulations of airflows over cubical block arrays.
AB - To reproduce homogeneous flow fields above urban-like turbulent boundary layers in computational fluid dynamics (CFD), numerous CFDs with a limited numerical domain employ periodic boundary conditions in both lateral directions with artificial momentum provision to maintain airflows. Although such artificial momentum sources are clearly different from the momentum provision in windtunnel experiments, the effects of these numerical conditions on the airflow in the boundary layer are not well studied. In this paper, therefore, we investigate how the momentum provision differentiates the vertical Reynolds stress and turbulent kinetic energy profiles using large-eddy simulations of airflows over cubical block arrays.
KW - Momentum provision
KW - Periodic boundary condition
KW - Quadrant analysis
KW - Turbulent statistics
KW - Urban turbulent boundary layer
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U2 - 10.3130/aije.87.145
DO - 10.3130/aije.87.145
M3 - Article
AN - SCOPUS:85124670853
SN - 1348-0685
VL - 87
SP - 145
EP - 156
JO - Journal of Environmental Engineering (Japan)
JF - Journal of Environmental Engineering (Japan)
IS - 792
ER -