Large Eddy Simulation of Unstably Stratified Turbulent Flow over Urban-Like Building Arrays
Joint Authors
Source
Journal of Applied Mathematics
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-12-05
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Thermal instability induced by solar radiation is the most common condition of urban atmosphere in daytime.
Compared to researches under neutral conditions, only a few numerical works studied the unstable urban boundary layer and the effect of buoyancy force is unclear.
In this paper, unstably stratified turbulent boundary layer flow over three-dimensional urban-like building arrays with ground heating is simulated.
Large eddy simulation is applied to capture main turbulence structures and the effect of buoyancy force on turbulence can be investigated.
Lagrangian dynamic subgrid scale model is used for complex flow together with a wall function, taking into account the large pressure gradient near buildings.
The numerical model and method are verified with the results measured in wind tunnel experiment.
The simulated results satisfy well with the experiment in mean velocity and temperature, as well as turbulent intensities.
Mean flow structure inside canopy layer varies with thermal instability, while no large secondary vortex is observed.
Turbulent intensities are enhanced, as buoyancy force contributes to the production of turbulent kinetic energy.
American Psychological Association (APA)
Wang, Bobin& Cui, Guixiang. 2013. Large Eddy Simulation of Unstably Stratified Turbulent Flow over Urban-Like Building Arrays. Journal of Applied Mathematics،Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-497701
Modern Language Association (MLA)
Wang, Bobin& Cui, Guixiang. Large Eddy Simulation of Unstably Stratified Turbulent Flow over Urban-Like Building Arrays. Journal of Applied Mathematics No. 2013 (2013), pp.1-10.
https://search.emarefa.net/detail/BIM-497701
American Medical Association (AMA)
Wang, Bobin& Cui, Guixiang. Large Eddy Simulation of Unstably Stratified Turbulent Flow over Urban-Like Building Arrays. Journal of Applied Mathematics. 2013. Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-497701
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-497701