The present paper deals with the SPH numerical modelling of the interaction between fluid and non-cohesive bed sediments whose scour is induced by a rapid water outflow from the bottom of an experimental reservoir. The dynamic behaviour of the liquid and granular phases is simulated by following two alternative approaches: either by treating them as slightly compressible fluids whose motion results from the numerical solution of the continuity and momentum equations according to the standard SPH formulation; or by describing the evolution of the interface between the two phases (i.e. the scouring process) as a transport-diffusion phenomenon. The main features of the model are presented first and then the numerical results for representative experimental test cases are discussed and compared with available experimental data.
Simulating rapid sediment scour by water flow with SPH
MANENTI, SAURO;GALLATI, MARIO;SIBILLA, STEFANO;
2009-01-01
Abstract
The present paper deals with the SPH numerical modelling of the interaction between fluid and non-cohesive bed sediments whose scour is induced by a rapid water outflow from the bottom of an experimental reservoir. The dynamic behaviour of the liquid and granular phases is simulated by following two alternative approaches: either by treating them as slightly compressible fluids whose motion results from the numerical solution of the continuity and momentum equations according to the standard SPH formulation; or by describing the evolution of the interface between the two phases (i.e. the scouring process) as a transport-diffusion phenomenon. The main features of the model are presented first and then the numerical results for representative experimental test cases are discussed and compared with available experimental data.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
