The numerical modeling of the scour rapidly induced by a water flow in a saturated layer of noncohesive sediment at the bottom of an experimental reservoir is carried out on the basis of the Smoothed Particle Hydrodynamics (SPH) method. Two alternative approaches have been followed for describing such a phenomenon: liquid and granular phases are treated as slightly compressible fluids whose motion results from the numerical solution of the continuity and momentum equations in Lagrangian form; the evolution of the interface between the two phases (i.e. the scouring process) is described as a transport-diffusion phenomenon. The main features of the model set up are presented and the numerical results for some representative 2D and 3D experimental test cases are discussed.
SPH Modeling of Rapid Sediment Scour Induced by Water Flow
MANENTI, SAURO;GALLATI, MARIO;SIBILLA, STEFANO
2009-01-01
Abstract
The numerical modeling of the scour rapidly induced by a water flow in a saturated layer of noncohesive sediment at the bottom of an experimental reservoir is carried out on the basis of the Smoothed Particle Hydrodynamics (SPH) method. Two alternative approaches have been followed for describing such a phenomenon: liquid and granular phases are treated as slightly compressible fluids whose motion results from the numerical solution of the continuity and momentum equations in Lagrangian form; the evolution of the interface between the two phases (i.e. the scouring process) is described as a transport-diffusion phenomenon. The main features of the model set up are presented and the numerical results for some representative 2D and 3D experimental test cases are discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
