Dam-break flows during initial stage using SWE and RANS approaches

Experimental and numerical results relating to dam-break flows are compared. Dam-break waves were generated by the quasi-instantaneous removal of a plate in a smooth prismatic channel of rectangular cross-section over horizontal dry and wet beds. The laboratory experiments were conducted to determin...

Full description

Saved in:

Bibliographic Details
Published in:	Journal of hydraulic research 2010-10, Vol.48 (5), p.603-611
Main Authors:	Ozmen-Cagatay, Hatice, Kocaman, Selahattin
Format:	Article
Language:	eng
Subjects:	Channels Computational fluid dynamics dam-break digital image processing Earth sciences Earth, ocean, space Economics Engineering and environment geology. Geothermics Engineering geology Exact sciences and technology flood wave propagation Flow characteristics Hydraulics Hydrology Hydrology. Hydrogeology Mathematical analysis Mathematical models Navier-Stokes equations surface profile volume of fluid
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Experimental and numerical results relating to dam-break flows are compared. Dam-break waves were generated by the quasi-instantaneous removal of a plate in a smooth prismatic channel of rectangular cross-section over horizontal dry and wet beds. The laboratory experiments were conducted to determine the initial stages of the free surface profiles using digital image processing. The flow characteristics were detected by applying an adequate, simple and economical measuring technique. The experimental results were compared with the results of a commercially available CFD program, solving the Reynolds-averaged Navier-Stokes (RANS) equations with the k-ϵ turbulence model involving the shallow-water equations. Measured and computed free surface profiles during the initial dam-break stages indicate that although both models predict the dam-break flow with a reasonable accuracy, the agreement using the RANS model is better.
ISSN:	0022-1686 1814-2079