Scopus
Large-eddy simulation of turbulent flow and structures within and above an idealized building array
Environmental Fluid Mechanics · Aralık 2017
Makale Bilgileri
DergiEnvironmental Fluid Mechanics
Yayın TarihiAralık 2017
Cilt / Sayfa17 · 1127-1152
Scopus ID2-s2.0-85021749340
Özet
In this research, wall-modeled LES has been performed to investigate turbulent flow in an idealized urban environment comprised of an array of rectangular buildings (MUST array). An inflow condition based on generation of grid turbulence is utilized to mimic the turbulent approaching boundary layer at the inlet of the computational domain. The numerical approach has been validated by comparing the first- and second-order statistical moments of the turbulent flow field against the available water-channel measurement data. Turbulent coherent flow structures, energy spectra, and budget balance of the resolved kinetic energy are investigated. With the aid of the dynamic nonlinear subgrid-scale (SGS) stress model, the backscatter of the kinetic energy from small to large scales of flow motions is also studied. It is found that the scatter of kinetic energy is sensitive to the presence of the building obstacles. As the elevation increases, the ratio of the SGS dissipation rate to the viscous dissipation rate remains stable under the backward scatter condition but varies significantly under the forward scatter condition.
Yazarlar (2)
1
M. Saeedi
2
Bing Chen Wang
Anahtar Kelimeler
Bluff body
Idealized urban environment
Large-eddy simulation
MUST array
Turbulence
Kurumlar
Amirkabir University of Technology
Tehran Iran
University of Manitoba
Winnipeg Canada
Metrikler
3
Atıf
2
Yazar
5
Anahtar Kelime