Numerical simulation of flow reattachment length in a stilling basin with a step-down floor

Xia, Q., Liu, Z. and Guo, X. (2014). Numerical simulation of flow reattachment length in a stilling basin with a step-down floor. In: Hubert Chanson and Luke Toombes, Hydraulic structures and society - Engineering challenges and extremes. 5th IAHR International Symposium on Hydraulic Structures, Brisbane, Australia, (1-7). 25-27 June 2014. doi:10.14264/uql.2014.32

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Author Xia, Q.
Liu, Z.
Guo, X.
Title of paper Numerical simulation of flow reattachment length in a stilling basin with a step-down floor
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.2014.32
Open Access Status DOI
ISBN 9781742721156
Editor Hubert Chanson
Luke Toombes
Start page 1
End page 7
Total pages 7
Language eng
Abstract/Summary A hydraulic jump is a good energy dissipator for eco-friendly dam construction. Using a stilling basin with a step-down floor remarkably decreases flow velocity on the floor as well as operation risk. Considering that the number of high dams that have adopted this type of energy dissipator has recently increased, this study investigates the relationship among reattachment length, step height, and flow depth and velocity on the step by applying a two-phase flow numerical simulation that combines the renormalization group k-ε turbulence model and the volume of fluid method. Simulation results show that the reattachment length does not change with the velocity on the step under certain conditions during which step height and flow depth on the step are variable. Fitting curves are established based on the dimensionless parameter of reattachment length/step height and step height/flow depth on the step.
Keyword Energy dissipation
Hydraulic jump
Reattachment length
Numerical simulation
Renormalization group k-ε turbulence model
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Non-UQ

 
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Created: Tue, 13 May 2014, 11:51:57 EST by Anthony Yeates on behalf of Scholarly Communication and Digitisation Service