Comparison between 2D and 3D hydraulic modelling approaches for simulation of vertical slot fishways

Lauchlan Arrowsmith, C. S. and Zhu, Y. (2014). Comparison between 2D and 3D hydraulic modelling approaches for simulation of vertical slot fishways. In: Hubert Chanson and Luke Toombes, Hydraulic structures and society - Engineering challenges and extremes. 5th IAHR International Symposium on Hydraulic Structures, Brisbane, Australia, (1-9). 25-27 June 2014. doi:10.14264/uql.2014.49

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Author Lauchlan Arrowsmith, C. S.
Zhu, Y.
Title of paper Comparison between 2D and 3D hydraulic modelling approaches for simulation of vertical slot fishways
Conference name 5th IAHR International Symposium on Hydraulic Structures
Conference location Brisbane, Australia
Conference dates 25-27 June 2014
Proceedings title Hydraulic structures and society - Engineering challenges and extremes
Journal name ISHS 2014 - Hydraulic Structures and Society - Engineering Challenges and Extremes: Proceedings of the 5th IAHR International Symposium on Hydraulic Structures
Place of Publication Brisbane, Australia
Publisher The University of Queensland
Publication Year 2014
Year available 2014
Sub-type Fully published paper
DOI 10.14264/uql.2014.49
Open Access Status DOI
ISBN 9781742721156
Editor Hubert Chanson
Luke Toombes
Start page 1
End page 9
Total pages 9
Language eng
Abstract/Summary The performance of a fishway is heavily dependent on the interplay between the hydraulic properties of the structure and adjacent waterway, and the biological variables of the targeted fish species. The optimal parameters for a vertical slot fishway such as the step height and opening size are usually difficult to obtain. To date Water Technology have utilised a 2D hydraulic modelling tool (MIKE21) to understand and design these structures. The limitation of this 2D modelling approach is the assumption of a uniform vertical velocity distribution and at fine grid scales inconsistencies in velocity and turbulence estimates provided by such models have been noted. To improve the ability to resolve fine scale velocity distributions and turbulence structures to the level required for fishway design the fully 3D modelling hydrodynamic package ANSYS CFX was used to model an existing fishway design. This allowed enhanced resolution and therefore understanding of the velocity distribution and turbulence structure within the fishway and provided a direct comparison between the 2D and 3D approaches. Based on the outcomes of this assessment a generalised design approach has been developed for vertical slot fishways, which will improve the understanding of the hydraulic properties of each structure, and the adjacent waterway and improve our ability to meet the specific requirements of Australian fish species.
Keyword Fishway
Hydraulic modelling
Turbulence
CFD modelling
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Non-UQ

 
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Created: Wed, 14 May 2014, 01:56:49 EST by Anthony Yeates on behalf of Scholarly Communication and Digitisation Service