<abstract xmlns="http://www.w3.org/1999/xhtml"><p>This paper deals with studying of two topics – measuring of velocity profile deformation behind a over-flooded construction and modelling of this velocity profile deformation by computational fluid dynamics (CFD). Numerical simulations with an unsteady RANS models - Standard <italic>k-ε</italic>, Realizable <italic>k-ε</italic>, Standard <italic>k-ω</italic> and Reynolds stress models (ANSYS Fluent v.18) and experimental measurements in a laboratory flume (using ADV) were performed. Results of both approaches showed and affirmed presence of velocity profile deformation behind the obstacle, but some discrepancies between the measured and simulated values were also observed. With increasing distance from the obstacle, the differences between the simulation and the measured data increase and the results of the numerical models are no longer usable.</p></abstract>

This paper deals with studying of two topics – measuring of velocity profile deformation behind a over-flooded construction and modelling of this velocity profile deformation by computational fluid dynamics (CFD). Numerical simulations with an unsteady RANS models - Standard k-ε, Realizable k-ε, Standard k-ω and Reynolds stress models (ANSYS Fluent v.18) and experimental measurements in a laboratory flume (using ADV) were performed. Results of both approaches showed and affirmed presence of velocity profile deformation behind the obstacle, but some discrepancies between the measured and simulated values were also observed. With increasing distance from the obstacle, the differences between the simulation and the measured data increase and the results of the numerical models are no longer usable.

CFD simulation of flow behind overflooded obstacle

Institute of Hydrology of the Slovak Academy of Sciences

Institute of Hydrodynamics of the Czech Academy of Sciences

Journal of Hydrology and Hydromechanics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"CFD simulation of flow behind overflooded obstacle"}

This paper deals with studying of two topics – measuring of velocity profile deformation behind a over-flooded construction and modelling of this velocity...

CFD simulation of flow behind overflooded obstacle

Published Online: Oct 29, 2018

Page range: 448 - 456

Received: Oct 31, 2017

Accepted: Mar 23, 2018

DOI: https://doi.org/10.2478/johh-2018-0028

Keywords
Velocity profile, Computational fluid dynamics (CFD), Free surface flow, Bridge, ADV, Laboratory flume, Numerical simulation, RANS models

© 2018 Yvetta Velísková et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

CFD simulation of flow behind overflooded obstacle

Published Online: Oct 29, 2018

Page range: 448 - 456

Received: Oct 31, 2017

Accepted: Mar 23, 2018

DOI: https://doi.org/10.2478/johh-2018-0028

KeywordsVelocity profile, Computational fluid dynamics (CFD), Free surface flow, Bridge, ADV, Laboratory flume, Numerical simulation, RANS models

© 2018 Yvetta Velísková et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Velocity profile, Computational fluid dynamics (CFD), Free surface flow, Bridge, ADV, Laboratory flume, Numerical simulation, RANS models