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3D numerical modelling and laboratory study of flow field induced by a group of submerged vegetations
John, Chukwuemeka K. Keating, M. Al-Qadami, E.H.H. Razi, M.A.M. Hanmaiahgari, P.R.
John, Chukwuemeka K.
Keating, M.
Al-Qadami, E.H.H.
Razi, M.A.M.
Hanmaiahgari, P.R.
Publication Date
2024-11-15
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(c) 2024 The Authors. This is an Open Access article distributed under the Creative Commons CC-BY license (http://creativecommons.org/licenses/by/4.0/)
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Yes
Open Access status
openAccess
Accepted for publication
2024-08-17
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Abstract
The three-dimensional (3D) numerical modelling in an open channel flow field of a group of submerged vegetations using computational fluid dynamics (CFD) platform of FLOW-3D HYDRO was performed in this study. A set of acoustic Doppler velocimetry (ADV) measurements have been conducted as benchmark to validate the numerical model. A quantitative comparison was performed on several hydrodynamic variables that impacted the vegetated open channel flow, such as flow depth, streamwise water velocity, turbulent intensity, and Reynolds shear stress. In the numerical analysis, the flow turbulence was treated using the RANS approach (within RNG k-ε); while the Volume Of Fluid (VOF) method was used to track the air-water interface. Structured meshes with hexahedral elements were used to discretize the channel geometry. In the findings, the numerical model reasonably reproduced the flow field and presented corresponding agreement with the experimental turbulent structures. This study showed that the differences in results between various analyses were all less than 10% and concludes that the presented numerical approach can be utilised as an efficient tool for simulations of the flow field within a vegetation patch (i.e. by using the simplified RANS approach).
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Published version
Citation
John CK, Pu JH, Guo Y et al (2024) 3D numerical modelling and laboratory study of flow field induced by a group of submerged vegetations. Ocean Engineering. 312(Part 1): 119038.
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Article