T.I. Marjoribanks
High-resolution numerical modelling of flow-vegetation interactions
Marjoribanks, T.I.; Hardy, R.J.; Lane, S.N.; Parsons, R.D.
Abstract
In this paper, we present and apply a new three-dimensional model for the prediction of canopy-flow and turbulence dynamics in open-channel flow. The approach uses a dynamic immersed boundary technique that is coupled in a sequentially staggered manner to a large eddy simulation. Two different biomechanical models are developed depending on whether the vegetation is dominated by bending or tensile forces. For bending plants, a model structured on the Euler–Bernoulli beam equation has been developed, whilst for tensile plants, an N-pendula model has been developed. Validation against flume data shows good agreement and demonstrates that for a given stem density, the models are able to simulate the extraction of energy from the mean flow at the stem-scale which leads to the drag discontinuity and associated mixing layer.
Citation
Marjoribanks, T., Hardy, R., Lane, S., & Parsons, R. (2014). High-resolution numerical modelling of flow-vegetation interactions. Journal of Hydraulic Research, 52(6), 775-793. https://doi.org/10.1080/00221686.2014.948502
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 22, 2014 |
Online Publication Date | Oct 13, 2014 |
Publication Date | Nov 1, 2014 |
Deposit Date | Oct 30, 2014 |
Publicly Available Date | Mar 9, 2015 |
Journal | Journal of Hydraulic Research |
Print ISSN | 0022-1686 |
Electronic ISSN | 1814-2079 |
Publisher | Taylor and Francis Group |
Peer Reviewed | Peer Reviewed |
Volume | 52 |
Issue | 6 |
Pages | 775-793 |
DOI | https://doi.org/10.1080/00221686.2014.948502 |
Keywords | Biomechanics, Large eddy simulations, Streams and rivers, Vegetated flows, Vortex dynamics. |
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Copyright Statement
This is an Accepted Manuscript of an article published by Taylor & Francis Group in Journal of Hydraulic Research on 13/10/2014, available online at: http://www.tandfonline.com/10.1080/00221686.2014.948502.
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