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www.hydrol-earth-syst-sci.net/14/705/2010/
doi:10.5194/hess-14-705-2010
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CFD modelling approach for dam break flow studies
1Water Resources Research And Documentation Centre, University For Foreigners, Villa La Colombella 0634 Perugia, Italy
2Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93 06125 Perugia, Italy
3H2CU, Honors Center of Italian Universities, University of Rome La Sapienza, Rome, Italy
Abstract. This paper presents numerical simulations of free surface flows induced by a dam break comparing the shallow water approach to fully three-dimensional simulations. The latter are based on the solution of the complete set of Reynolds-Averaged Navier-Stokes (RANS) equations coupled to the Volume of Fluid (VOF) method.
The methods assessment and comparison are carried out on a dam break over a flat bed without friction, a dam break over a triangular bottom sill and a dam break flow over a 90° bend. Experimental and numerical literature data are compared to present results.
The results demonstrate that the shallow water approach, even if able to sufficiently reproduce the main aspects of the fluid flows, loses some three-dimensional phenomena, due to the incorrect shallow water idealization that neglects the three-dimensional aspects related to the gravity force.
Final Revised Paper (PDF, 1382 KB) Discussion Paper (HESSD)
Citation: Biscarini, C., Di Francesco, S., and Manciola, P.: CFD modelling approach for dam break flow studies, Hydrol. Earth Syst. Sci., 14, 705-718, doi:10.5194/hess-14-705-2010, 2010. Bibtex EndNote Reference Manager XML
