Author(s): D. Zagar; E. Dzebo; M. Jeromel; M. Cetina; G. Petkovsek
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Keywords: SPH; Dam break; Variable roughness; Meshfree method; Numerical modelling
Abstract: The paper presents a study of a failure of a dam located at Kolarjev vrh, Slovenia. In case of such an event, water would rush with very high velocity through a steep valley with 10-30% slope to the plain 700 m below. The surge front and free surface in such conditions are difficult to simulate with conventional numerical schemes. The meshless Smoothed Particle Hydrodynamics (SPH) method provides a good alternative. However, the treatment of boundaries is not straightforward in SPH, and friction plays a significant role in the analysed case. Zagar et al. (2009) modelled the roughness by adding random elevation differences to the surface geometry. In this study, a variable roughness parameter was introduced to the SPH model instead. Both solutions showed good results with slight variances. A comparison between the two approaches is presented, as well as a comparison to a curvilinear finite volume model and measurements on a physical model.
Year: 2011