1 Introduction
1.1 Objectives
1.2 State of the art
1.2.1 Eulerian and Lagrangian approaches for free surface flow analysis
1.2.2 Stabilization techniques
1.2.3 Algorithms for FSI problems
1.3 Numerical model
1.3.1 Reasons
1.3.2 Essential features
1.3.3 Outline
1.4 Publications
2 Velocity-based formulations for compressible materials
2.1 Velocity formulation
2.1.1 From the local form to the spatial semi-discretization
2.1.2 Time integration
2.1.3 Linearization
2.1.4 Incremental solution scheme
2.2 Mixed velocity-pressure formulation
2.2.1 Quasi-incompressible form of the continuity equation
2.2.2 Solution method
2.3 Hypoelasticity
2.3.1 Velocity formulation for hypoelastic solids
2.3.2 Mixed Velocity-Pressure formulation for hypoelastic solids
2.3.3 Theory of plasticity
2.3.3.1 Hypoelastic-plastic materials
2.3.4 Validation examples
2.4 Summary and conclusions
3 Unified stabilized formulation for quasi-incompressible materials
3.1 Stabilized FIC form of the mass balance equation
3.1.1 Governing equations
3.1.2 FIC mass balance equation in space and in time
3.1.3 FIC stabilized local form of the mass balance equation
3.1.4 Variational form
3.1.5 FEM discretization and matrix form
3.2 Solution scheme for quasi-incompressible Newtonian fluids
3.2.1 Governing equations
3.2.2 Solution scheme
3.3 Solution scheme for quasi-incompressible hypoelastic solids
3.4 Free surface flow analysis
3.4.1 The Partiele Finite Element Method
3.4.1.1 Remeshing
3.4.1.2 Basic steps
3.4.1.3 Advantages and disadvantages
3.4.2 Mass conservation analysis
3.4.2.1 Numerical examples
3.4.3 Analysis of the conditioning of the solution scheme
3.4.3.1 Drawbacks associated to the real bulk modulus
3.4.3.2 Optimum value for the pseudo bulk modulus
3.4.3.3 Numerical examples
3.5 Validation examples
3.5.1 Validation of the Unified formulation for Newtonian fluids
3.5.2 Validation of the Unified formulation for quasi-incompressible hypoelastic solids
3.6 Summary and conclusions
4 Unified formulation for F SI problems
4.1 Introduction
4.2 FSI algorithm
4.3 Coupling with the Velocity formulation for the solid
4.4 Coupling with the mixed Velocity-Pressure formulation for the solid
4.5 Numerical examples
4.6 Summary and conclusions
5 Coupled thermal-mechanical formulation
5.1 Introduction
5.2 Heat problem
5.2.1 FEM discretization and solution for a time step
5.3 Thermal coupling
5.3.1 Numerical examples
5.4 Phase change
5.4.1 Numerical example: melting of an ice block
5.5 Summary and conclusions
6 Industrial application: PFEM Analysis Model of NPP Severe Accident
6.1 Introduction
6.1.1 Assumptions allowed by the specification
6.2 Numerical method
6.3 Basic Model
6.3.1 Problem data
6.3.2 Preliminary study
6.3.3 Numerical results
6.4 Detailed model
6.4.1 Problem data
6.4.2 Preliminary study
6.4.3 Numerical results
6.5 Summary and conclusions
7 Conclusions and future lines of research
7.1 Contributions
7.2 Lines for future work.