Characterization of Dispersive Fluxes in Mesoscale Models Using LES of Flow over an Array of Cubes
Joint Authors
Source
International Journal of Atmospheric Sciences
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-07-21
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Earth Science , Water and Environment
Physics
Abstract EN
Field studies have shown that local climate is strongly influenced by urban structures.
This influences both energy consumption and the pedestrian comfort.
It is thus useful to be able to simulate the urban environment to take these effects into account in building and urban design.
But for computational reasons, conventional computational fluid dynamics (CFD) codes cannot be used directly on a grid fine enough to resolve all scales found in a city.
For this, we use mesoscale models, variants of CFD codes in which the 3D conservation equations are solved on grids having a resolution of a few kilometers.
At this resolution, the effects of subgrid scales need implicit representations.
In other words, phenomena such as momentum and energy exchanges averaged over the mesoscale grid contribute necessary sources/sinks to the corresponding equations.
Such spatial averaging results in additional terms called dispersive fluxes.
Until now these fluxes have been ignored.
To better understand these fluxes, we have conducted large eddy simulations (LESs) over an array of cubes for different inter-cube spacings.
The study shows that these fluxes are as important as the turbulent fluxes and exhibit trends which are related to the eddy formations inside the canopies.
American Psychological Association (APA)
Rasheed, Adil& Robinson, Darren. 2013. Characterization of Dispersive Fluxes in Mesoscale Models Using LES of Flow over an Array of Cubes. International Journal of Atmospheric Sciences،Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-506438
Modern Language Association (MLA)
Rasheed, Adil& Robinson, Darren. Characterization of Dispersive Fluxes in Mesoscale Models Using LES of Flow over an Array of Cubes. International Journal of Atmospheric Sciences No. 2013 (2013), pp.1-10.
https://search.emarefa.net/detail/BIM-506438
American Medical Association (AMA)
Rasheed, Adil& Robinson, Darren. Characterization of Dispersive Fluxes in Mesoscale Models Using LES of Flow over an Array of Cubes. International Journal of Atmospheric Sciences. 2013. Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-506438
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-506438