Effect of Downstream Channel Slope on Numerical Modeling of Dam Break Induced Flows

2016-07-29
Dinçer, Ali Ersin
Bozkuş, Zafer
Şahin, Ahmet Nazım
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In the present study, the numerical simulations of dam break induced flows are performed by using various models. The numerical models used in the study are laminar, large eddy simulation (LES) and Reynolds-Averaged Navier Stokes (RANS) equations with k-ε turbulence model. In addition a recently developed Smoothed Particle Hydrodynamics (SPH) code is also used to simulate dam break problem. For the validation of the numerical approaches, a recently published experimental study is used. In the experimental study, an idealized dam break problem in a sloped channel is investigated. It is found that although other numerical approaches give similar velocity profiles with the experiments, RANS equations with k-ε turbulence model gives underestimated results. The same problem is simulated by assuming that the downstream channel is not inclined, i.e. horizontal. It is observed that when the channel is not inclined, k-ε turbulence model gives closer results to other numerical models. Therefore, it can be concluded that for dam break induced flows, slope of the channel may adversely affect the accuracy of k-ε turbulence model. However, more experimental and numerical data is needed to validate this conclusion. © 2016 Taylor & Francis Group, London.
Dambreak, K-ε turbulence model, Laminar flow, Large Eddy simulation, Les, Turbulence modelling
https://hdl.handle.net/11511/82380
https://www.scopus.com/record/display.uri?eid=2-s2.0-85015073902&origin
Effect of Downstream Channel Slope on Numerical Modeling of Dam Break Induced Flows, 4th IAHR Europe Congress, 27 - 29 Temmuz 2016
Department of Civil Engineering, Conference / Seminar

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Citation Formats
A. E. Dinçer, Z. Bozkuş, and A. N. Şahin, “Effect of Downstream Channel Slope on Numerical Modeling of Dam Break Induced Flows,” presented at the Effect of Downstream Channel Slope on Numerical Modeling of Dam Break Induced Flows, 4th IAHR Europe Congress, 27 - 29 Temmuz 2016, Liege, Belgium, 2016, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/82380.
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