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Development and validation of a SPH model using discrete surface elements at boundaries

pubblicazioni - Memoria

Development and validation of a SPH model using discrete surface elements at boundaries

Un modello SPH 3D, basato su un’approssimazione SPH particellare completa alle frontiere del dominio fluido, è stato sviluppato e validato su due casi studio: l’impatto di un getto idrico su una piastra (2D) e l’impatto di un fronte di dam break (“crollo di diga”) sperimentale (3D) su un ostacolo orizzontale. Il modello permette di rappresentare flussi inerziali a superficie libera e la loro interazione con frontiere solide.

A 3D fully Lagrangian SPH numerical model has been developed according to a complete SPH particle approximation, which considers both volume and surface elements at boundaries. This model relies on the same principles of the 2D model by Ferrand et al. (2012) and an adaptation of the Partial Riemann Solver used in SPH-ALE modeling. The model validation concerns comparisons with analytical solutions and experimental data of two reference test cases: a water jet impact over a plate (2D) and a dam break experimental impact on a parallelepiped obstacle (3D). The results show that the model represents a valid numerical tool in order to treat inertial free surface flows and their interactions with solid boundaries.

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