A laboratory-scale numerical study of the effects of bank-attached vane submergence on flow pattern and bed shear stress distribution

Journal Article (2025)
Author(s)

M. Bahrami-Yarahmadi (Shahid Chamran University of Ahvaz)

Roya Erick (Shahid Chamran University of Ahvaz)

Mahmood Shafai-Bejestan (Shahid Chamran University of Ahvaz)

E. Mosselman (TU Delft - Rivers, Ports, Waterways and Dredging Engineering, Deltares)

Research Group
Rivers, Ports, Waterways and Dredging Engineering
DOI related publication
https://doi.org/10.1080/00221686.2024.2446582
More Info
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Publication Year
2025
Language
English
Research Group
Rivers, Ports, Waterways and Dredging Engineering
Bibliographical Note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. @en
Issue number
1
Volume number
63
Pages (from-to)
15-31
Reuse Rights

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Abstract

Bank-attached vanes (BAVs) are triangular vanes to protect the outer banks of river bends against erosion. However, their performance for higher or lower bankfull depth is uncertain. This study aims to validate the Flow3D numerical model, to study the effects of submergence and emergence of BAVs on flow patterns and bed shear stresses at h/H = 0.5, 1, 1.5 and 2 (h = flow depth, H = BAV height) and constant Froude number. The results showed that a recirculation cell, 1.046 times the structure’s length, developed behind the emerged BAV (h/H = 0.5), whereas no recirculation occurred behind the submerged BAV (h/H = 1, 1.5 and 2). Increasing the flow depth undermined the BAV’s effectiveness in reducing bed shear stress near the outer bank. The bed shear stress near the BAV’s tip at h/H = 0.5, 1, 1.5 and 2 was equivalent to 1.67, 1.45, 1.3 and 1.24 times the average bed shear stress upstream of the bend, respectively.

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