Modelling of subcritical free-surface flow over an inclined backward-facing step in a water channel

0351055 - ÚT 2011 RIV CZ eng C - Conference Paper (international conference)
Příhoda, Jaromír - Zubík, P. - Šulc, J. - Sedlář, M.
Modelling of subcritical free-surface flow over an inclined backward-facing step in a water channel.
International Conference Experimental Fluid Mechanics 2010. Vol. 1. Liberec: Technical University of Liberec, 2010 - (Vít, T.; Dančová, P.), s. 555-560. ISBN 978-80-7372-670-6.
[Experimental Fluid Mechanics 2010. Liberec (CZ), 24.11.2010-26.11.2010]
R&D Projects: GA ČR GA103/09/0977
Institutional research plan: CEZ:AV0Z20760514
Keywords : backward-facing inclined step * free-surface flow * flow separation
Subject RIV: BK - Fluid Dynamics

The contribution deals with the experimental and numerical modelling of subcritical turbulent flow in an open channel with an inclined backward-facing step. The step with 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 means of the commercial software ANSYS CFX 12.0. Numerical results obtained for two-equation models and EARSM turbulence model completed by transport equations for turbulent energy and specific dissipation rate were compared with experimental data. The modelling was concentrated particularly on the development of the flow separation and on the corresponding changes of free surface.
Permanent Link: http://hdl.handle.net/11104/0190889