This work presents the advances in modelling scouring phenomena of non-cohesive sediments induced by free-surface water flows through the SPH approach; in particular this paper is focused on the selection of the strength criterion for defining the failure mechanism and the incipient motion of the bottom sediments under hydrodynamic friction. Two approaches have been analyzed: one is derived from the Mohr-Coulomb yield criterion, in which some improvements have been realized to include the effect of the fluid properties; the other is based on the more classic Shields approach [11]. A preliminary sensitivity analysis has been carried out in order to provide qualitative assessment of the influence of the model parameters on the erosion process; subsequently an experimental test case has been simulated for evaluating the accuracy provided by both yielding criteria.
Prediction of sediment scouring through SPH
MANENTI, SAURO;SIBILLA, STEFANO;GALLATI, MARIO;
2010-01-01
Abstract
This work presents the advances in modelling scouring phenomena of non-cohesive sediments induced by free-surface water flows through the SPH approach; in particular this paper is focused on the selection of the strength criterion for defining the failure mechanism and the incipient motion of the bottom sediments under hydrodynamic friction. Two approaches have been analyzed: one is derived from the Mohr-Coulomb yield criterion, in which some improvements have been realized to include the effect of the fluid properties; the other is based on the more classic Shields approach [11]. A preliminary sensitivity analysis has been carried out in order to provide qualitative assessment of the influence of the model parameters on the erosion process; subsequently an experimental test case has been simulated for evaluating the accuracy provided by both yielding criteria.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
