👈🏼 Back to list
Nicolò Salis
Università di Pavia
multiphase CFD
offshore engineering
fluid-structure interaction
PHD school
Design, Modelling and Simulation in Engineering
PhD Cycle
36
List of Supervisors
Sauro Manenti
Main research approches
Numerical analysis
Research abstract
Lagrangian particle-based simulation of waves and offshore structure interaction
Background And Research Gaps
Modelling free surface flows with Eulerian approaches introduces some challenging aspects to be handled, such as free surface detection, simulation of jets, sprays and wave breaking. Large grid distortion that may occur can affect the solution accuracy, and therefore it must be properly treated with expensive re-meshing techniques. Owing to its intrinsic properties, Lagrangian particle methods have proven to be a reliable tool for the simulation of free surface flows with impacts. The Lagrangian particle formulation of the discretised fluid governing equations lacks the advection terms, thus avoiding numerical diffusion and making particle methods more suitable to model advection-dominated flows. Furthermore, the particle discretisation allows tracking implicitly fluid interfaces when dealing with multiphase interaction problems.
Research Goals
Lagrangian particle-based modelling of: 2D flume generation and propagation of small-amplitude regular waves; 2D and 3D flume generation and propagation non-liner waves with the focusing wave theory; 2D flume generation and propagation solitary waves generation; 2D and 3D wave impact with fixed structures; 3D wave interaction with tension leg floating offshore platform; 2D and 3D multiphase (air-water) flows to model rapid water-structure impact with air entrapment.
Methods
Smoothed Particle Hydrodynamics (SPH); Particle Finite Element Method (PFEM).
Results
Results achieved are: Development of Free Open Source research codes. Lagrangian particle-based modelling of: 2D flume generation and propagation of small-amplitude regular waves; 2D flume generation and propagation non-liner waves with the focusing wave theory; 2D flume generation and propagation solitary waves generation; 2D wave impact with fixed structures. 2D multiphase (air-water) flows to model rapid water-structure impact with air entrapment.
Result expected are: Lagrangian particle-based modelling of: 3D wave impact with fixed structures; 3D wave interaction with tension leg floating offshore platform; 3D multiphase (air-water) flows to model rapid water-structure impact with air entrapment.