Asymptotics of averaged turbulent transfer in canopy flows
Article
Article Title | Asymptotics of averaged turbulent transfer in canopy flows |
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ERA Journal ID | 239 |
Article Category | Article |
Authors | Mohammed, F. J. (Author), Strunin, D. V. (Author), Ngo-Cong, D. (Author) and Tran-Cong, T. (Author) |
Journal Title | Journal of Engineering Mathematics |
Journal Citation | 91 (1), pp. 81-104 |
Number of Pages | 24 |
Year | 2015 |
Place of Publication | Dordrecht, Netherlands |
ISSN | 0022-0833 |
1573-2703 | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s10665-014-9737-y |
Abstract | We formulate and analyse a long-time asymptotic model of dispersion in turbulent canopy flows, of an urban or industrial nature. The model is formulated in terms of the concentration averaged across the flow, for example over river depth. The general approach that laid a firm foundation for the averaging procedure was proposed by Roberts and co-authors in the late 1980s. We derive an evolution partial differential equation for the averaged concentration, involving first, second and higher derivatives with respect to spatial coordinates. The coefficients of the equation are derived and analysed against the parameters characterising the turbulent flow. In particular, we show that, in the limit of large flow depths, the values of the coefficients coincide with those obtained earlier for the flow over a smooth bottom. |
Keywords | canopy; dispersion; roughness; turbulent flow |
ANZSRC Field of Research 2020 | 401213. Turbulent flows |
490410. Partial differential equations | |
490101. Approximation theory and asymptotic methods | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Computational Engineering and Science Research Centre |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2x3q/asymptotics-of-averaged-turbulent-transfer-in-canopy-flows
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