Publication detail

Modelling of Supercritical Turbulent Flow ower an Inclined Backward-Facing Step in a Open Channel

PŘÍHODA, J. ZUBÍK, P. ŠULC, J. SEDLÁŘ, M.

Original Title

Modelling of Supercritical Turbulent Flow ower an Inclined Backward-Facing Step in a Open Channel

English Title

Modelling of Supercritical Turbulent Flow ower an Inclined Backward-Facing Step in a Open Channel

Type

conference paper

Language

en

Original 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 h = 100 mm and the inclination angle alfa = 20 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.

English 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 h = 100 mm and the inclination angle alfa = 20 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

numerical simulation, supercritical flow, Backward-facing inclined step, open channel, LDA, PIV

RIV year

2011

Released

09.05.2011

Publisher

Ústav termomechaniky AVČR

Location

Svratka

ISBN

978-80-87012-33-8

Book

17th International Conference Engineering Mechanics 2011

Edition number

1

Pages from

495

Pages to

498

Pages count

4

Documents

BibTex


@inproceedings{BUT75937,
  author="Jaromír {Příhoda} and Pavel {Zubík} and Jan {Šulc} and Milan {Sedlář}",
  title="Modelling of Supercritical Turbulent Flow ower an Inclined Backward-Facing Step in a Open Channel",
  annote="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 h = 100 mm and the inclination angle alfa = 20 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.",
  address="Ústav termomechaniky AVČR",
  booktitle="17th International Conference Engineering Mechanics 2011",
  chapter="75937",
  howpublished="electronic, physical medium",
  institution="Ústav termomechaniky AVČR",
  year="2011",
  month="may",
  pages="495--498",
  publisher="Ústav termomechaniky AVČR",
  type="conference paper"
}