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Dam-Break Flows in Presence of Abrupt Bottom Variations

Author(s): F. Aureli; P. Mignosa; M. Tomirotti

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Keywords: Dam-Break; St. Venant equations; Mac Cormack scheme; Shock waves; Experimental dat

Abstract: In the present work numerical results of a 1D mathematical model for Dam-Break flows, based on Mac Cormack shock-capturing scheme, are compared with experimental tests realised in presence of abrupt bottom variations. The laboratory investigation has been carried out in a tilting flume in which bumps of relevant height, if compared to water depth at the dam section, were placed; this causes shock formation, strong surface curvatures and reverse flow. Numerical results show quite a satisfactory agreement with experimental data, even if the considered configurations violate, almost locally, some St. Venant hypotheses. This confirms the applicability of the numerical model even in limit conditions that could occur in nature.


Year: 1999

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