Working

(Difference between revisions)
 Revision as of 07:44, 3 July 2013 (view source)Antonia (Talk | contribs) (→Structure)← Older edit Revision as of 07:45, 3 July 2013 (view source)Antonia (Talk | contribs) (→Convection Diffusion module)Newer edit → Line 194: Line 194: ==== Boundary conditions ==== ==== Boundary conditions ==== ==== Initial conditions ==== ==== Initial conditions ==== − === Benchmarking === + ==== Problem parameters ==== − === Tutorials === + ==== Others relevand aspects ==== === Benchmarking === === Benchmarking ===

Computational Fluid Dynamics module

Introduction

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
• In this case several different solvers are availables:
• Direct Solvers:
• Super LU (External library available at....) Just a few words on the characteristics
• Pardiso direct solver (External library available at ...) Just a few words on the characteristics
• Iterative Solvers:
• Mixed UP ?!?!??!!??!
• Super LU iterative

For the iterative solvers a series of preconditioners is available:

• ILU 0 preconditioner:
• Diagonal preconditioner

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

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

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

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

Solvers

Several different solvers are availables:

• Direct Solvers:
• Skyline LU solver
• Super LU (External library available at....) Just a few words on the characteristics
• Pardiso direct solver (External library available at ...) Just a few words on the characteristics
• Iterative Solvers:
• Conjugate gradient (remember to specify for which kind of problems can be used!)

For the iterative solvers a series of preconditioners is available:

• ILU 0 preconditioner:
• Diagonal preconditioner

HPC

The code can be run in shared or distributed memory:

• OpenMP:
• MPI:

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:

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:
• ...

...

...

Benchmarking

Here validation and verification examples should be inserted

Convection Diffusion module

Introduction

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