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Investigation of open channel flow with unsubmerged rigid vegetation by the lattice Boltzmann method
Jing, H. Cai, Y. Wang, W. Guo, Yakun Li, C. Bai, Y.
Jing, H.
Cai, Y.
Wang, W.
Guo, Yakun
Li, C.
Bai, Y.
Publication Date
2020
End of Embargo
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Rights
(c) 2020 Springer Verlag. Reproduced in accordance with the publisher's self-archiving policy.
The final publication is available at Springer via https://doi.org/10.1007/s42241-019-0072-7.
Peer-Reviewed
Yes
Open Access status
openAccess
Accepted for publication
2019-03-04
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Department
Awarded
Embargo end date
Additional title
Abstract
Aquatic vegetation can significantly affect flow structure, sediment transport, bed scour and water quality in rivers, lakes, reservoirs and open channels. In this study, the lattice Boltzmann method is applied for performing the two dimensional numerical simulation of the flow structure in a flume with rigid vegetation. A multi-relaxation time model is applied to improve the stability of the numerical scheme for flow with high Reynolds number. The vegetation induced drag force is added in lattice Boltzmann equation model with the algorithm of multi-relaxation time in order to improve the simulation accuracy,. Numerical simulations are performed for a wide range of flow and vegetation conditions and are validated by comparing with the laboratory experiments. Analysis of the simulated and experimentally measured flow field shows that the numerical simulation can satisfactorily reproduce the laboratory experiments, indicating that the proposed lattice Boltzmann model has high accuracy for simulating flow-vegetation interaction in open channel.
Version
Accepted manuscript
Citation
Jing H, Cai Y, Wang W et al (20120) Investigation of open channel flow with unsubmerged rigid vegetation by the lattice Boltzmann method. Journal of Hydrodynamics. 32: 771-783.
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Type
Article