Working

Computational Fluid Dynamics module

Introduction

Examples showing the class of problems that the code can solve (2-4 examples)

Brief description of wat the model means, eventually insert link to the benchmark section...or whatever...

Brief description of what the model means
Brief description of what the model means
Brief description of what the model means

Description of the underlying theory and schematic list of the problems this application can solve.

In this application the Navier Stokes equations are solved bla bla..

Structure

Fluid types

• Incompressible fluid
• Compressible fluid

Constitutive laws

• Newtonian
• No-Newtonian
• Bingham plastics
• Variable yield model

Kinematical approaches

• Eulerian
• With free surface (level set)
• Without free surface
• Lagrangian PFEM (implicitly with free surface)

Solution strategy

• Fractional step
• Monolithic

Different solvers are availables (LINK TO SOLVER SECTION!!!!)

In both cases a Newton Raphson residual based strategy is used for linearizing the problem.

Elements

Linear triangular elements in 2D and linear tetrahedra elements in 3D.

Stabilization techniques availables:

• ASGS
• OSS

Boundary conditions

• Velocity boundary condition: Inlet of water
• Pressure boundary condition: Pressure can be imposed strongly or weakly...
• Wall boundary condition:
• Slip/no slip boundary condition
• Wall law
• Flag variable?????

Initial conditions

Initial condition both in velocity and pressure can be set.

Turbulence models

The user can chose wether to use or not a turbulence model. Those available in kratos are:

• Smagorinsky-Lily
• Spalart-Allmaras

HPC

The code can be run in shared or distributed memory:

• OpenMP:
• MPI:

Computational Structural Mechanics module

Introduction

Examples showing the class of problems that the code can solve (2-4 examples)

Description of the underlying theory and schematic list of the problems this application can solve.

The Computational Structural Mechanics module (CSM) is....

Application Structure

Analysis Type

The available solutions strategies are:

• Static
• Dynamic
• Relaxed dynamic

With this module you can solve both linear and non linear problems. In case of non linear problems several methods are available:

• Newton-Raphson
• Newton Raphson with line search
• Arch lenght

Different solvers are availables (LINK TO SOLVER SECTION!!!!)

Elements

• Frame Elements:
• Euler-Bernoulli beam short explanation
• Crisfield truss short explanation
• 2D elements
• Linear triangular element:
• Shell elements:
• Isotropic shell: (change the name with the usual one!!!!)
• Ansotropic shell: (change the name with the usual one!!!!)
• EBST shell: (change the name with the usual one!!!!)
• Membrane element:
• Solid elements:
• Linear tetrahedral element:
Dimension Element Type Kratos name Geometry Nonlinearity Material Type
1D Frame LinearBeamElement Line Isotropic
1D Truss CrisfieldTrussElement Line Large Displacement Isotropic
2D Solid TotalLagrangian 2D Geometries Large Displacement Isotropic
3D Solid TotalLagrangian 3D Geometries Large Displacement Isotropic
Shell ShellIsotropic 3D Triangle Large Displacement Isotropic
Shell ShellAnisotropic 3D Triangle Large Displacement Orthotropic

Boundary Conditions

Boundary conditions can be set fixing displacements and rotations degrees of freedom.

• Self weight
• Punctual force
• Moment
• Face pressure (sign convenction!!!!)

Constitutive laws

The following constitutive laws are available:

• Linear elastic:
• ...

HPC

The code can be run in shared or distributed memory:

• OpenMP:
• MPI:

...

...

Benchmarking

Here validation and verification examples should be inserted

Convection Diffusion module

Introduction

Examples showing the class of problems that the code can solve (2-4 examples)

Description of the underlying theory and schematic list of the problems this application can solve.

Structure

Kinematical approaches

    Eulerian and Lagrangian approach.


Elements

Linear triangular elements in 2D and linear tetrahedra elements in 3D.

ConvDiff2D

ConvDiff3D

Boundary conditions

Dirichlet boundary condition: T(xo,t)=To

Neumann boundary conditions: $k (\nabla T) \cdot n = q on \Gamma_N \times (0, T)$