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Original title:
Modelling of supercritical turbulent flow over an inclined backward-facing step in a open channel
Authors: Příhoda, Jaromír ; Zubík, P. ; Šulc, J. ; Sedlář, M.
Document type: Papers
Conference/Event: Engineering Mechanics 2011 /17./, Svratka (CZ), 2011-05-09 / 2011-05-12
Year: 2011
Language: eng
Abstract: The contribution deals with the experimental and numerical modelling of supercritical turbulent flow in an open channel with an inclined backward-facing step on its bottom. The step with the height 100 mm and the inclination angle 20 deg was placed in the water channel of the cross-section 200x200 mm. Experiments were carried out by means of the PIV and LDA measuring techniques. Numerical simulations were executed by the commercial software ANSYS CFX 12.0. Numerical results obtained by the two-equation SST model and the EARSM model completed by transport equations for turbulent energy and specific dissipation rate were compared with experimental data. The modelling was concentrated particularly on the flow pattern near the step including the possible flow separation and the corresponding changes of free surface. The agreement of numerical results obtained by means of the EARSM model with experimental data is quite good.
Keywords: inclined backward-facing step; open channel flow; supercritical flow
Project no.: CEZ:AV0Z20760514 (CEP), GA103/09/0977 (CEP)
Funding provider: GA ČR
Host item entry: Engineering Mechanics 2011, ISBN 978-80-87012-33-8
Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0198631
Permalink: http://www.nusl.cz/ntk/nusl-55800
The record appears in these collections:
Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers
Authors: Příhoda, Jaromír ; Zubík, P. ; Šulc, J. ; Sedlář, M.
Document type: Papers
Conference/Event: Engineering Mechanics 2011 /17./, Svratka (CZ), 2011-05-09 / 2011-05-12
Year: 2011
Language: eng
Abstract: The contribution deals with the experimental and numerical modelling of supercritical turbulent flow in an open channel with an inclined backward-facing step on its bottom. The step with the height 100 mm and the inclination angle 20 deg was placed in the water channel of the cross-section 200x200 mm. Experiments were carried out by means of the PIV and LDA measuring techniques. Numerical simulations were executed by the commercial software ANSYS CFX 12.0. Numerical results obtained by the two-equation SST model and the EARSM model completed by transport equations for turbulent energy and specific dissipation rate were compared with experimental data. The modelling was concentrated particularly on the flow pattern near the step including the possible flow separation and the corresponding changes of free surface. The agreement of numerical results obtained by means of the EARSM model with experimental data is quite good.
Keywords: inclined backward-facing step; open channel flow; supercritical flow
Project no.: CEZ:AV0Z20760514 (CEP), GA103/09/0977 (CEP)
Funding provider: GA ČR
Host item entry: Engineering Mechanics 2011, ISBN 978-80-87012-33-8
Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0198631
Permalink: http://www.nusl.cz/ntk/nusl-55800
The record appears in these collections:
Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers
Record created 2011-09-06, last modified 2024-01-26