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High-resolution numerical modelling of flow-vegetation interactions

Marjoribanks, T.I.; Hardy, R.J.; Lane, S.N.; Parsons, R.D.

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T.I. Marjoribanks

S.N. Lane

R.D. Parsons


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.


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.

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
Keywords Biomechanics, Large eddy simulations, Streams and rivers, Vegetated flows, Vortex dynamics.


Accepted Journal Article (1.7 Mb)

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:

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