kratosmultiphysics / examples Goto Github PK

https://github.com/KratosMultiphysics/Examples/tree/master/shape_optimization

It will be nice if this examples followed the structure of the others, with the corresponding description and previews of the examples. Just that

Hi everyone,

Opening a CFD fluid model 2D in the kratos problem type, it seems that mixes multiple CFD interface. As you can see in the screenshot below, the BCs repeat and they belong to different CFD interfaces.

Regars,
Nicolò

I downloaded the Kratos binaries (KratosRelease) for Linux and successfully used install.sh to create the alias kratos. I was then able to run the example cylinder_cooling_Re100_Pr2 with kratos MainKratos.py

However, I then tried to run fsi_turek_FSI2 and I get this error:

Importing  KratosFSIApplication 
Initializing KratosFSIApplication...
Traceback (most recent call last):
  File "MainKratos.py", line 44, in <module>
    analysis_stage_module, analysis_stage_class_name)
AttributeError: 'module' object has no attribute 'FsiAnalysis'
KRATOS TERMINATED WITH ERROR

What can I do to correct this error?

Thank you

Hi! I'm trying to update the contact examples that are in the Mmg folder but they aren't working correctly.

I've changed a few things locally but can't get them to work. I think it may be an application problem.

@rubenzorrilla It would be helpful if someone could take a look at them.

The examples are:

• contact_hessian
• contact_spr
• contacting_cylinders
• hertz_hessian

I played around a bit with the new Examples repository. All suggestions, criticisms and improvements are welcome.
@KratosMultiphysics/technical-committee, @adityaghantasala, @rubenzorrilla: We should start discussing which categories to create (solids, discrete elements?, thermal flows,...) and propose lists of benchmarks/use cases to include in each.

By the way, you can see the repository here

I tried to run the case using the source files provided and it gave me a nan in the first iteration.

Hi,
It seems to me that there are some strange results on the eigenvectors. I get them with the following code:

for node in main_model_part.Nodes:
    print(node.GetValue(StructuralMechanics.EIGENVECTOR_MATRIX))

Using the example of the beam, the values for the 1st, the 8th and the 22th frequency (index 0, 7 and 21 in Python) and the 3rd (index 2 in Python) degree of freedom have a completely different order of magnitude compared to the other values. Can this be correct? How are the eigenvectors normalized?

Hi, I'm trying to push a branch to migrate examples from KratosMultiphysics to Examples repo, but I'm getting a permission error:

mmaso@PCCB019:~/Examples$ git push --set-upstream origin pfem2-migrating-examples 
Username for 'https://github.com': [email protected]
Password for 'https://[email protected]@github.com': 
remote: Permission to KratosMultiphysics/Examples.git denied to miguelmaso.
fatal: unable to access 'https://github.com/KratosMultiphysics/Examples.git/': The requested URL returned error: 403

@philbucher do you know how to get access to that repo?

possible to get the eigenvalue- and eigenvector-results to python-workspace?

Examples/structural_mechanics/validation/beam_eigenvalue_analysis/source/MainKratos.py

In order to not destroy this repo with large files it will be a good idea to use:

https://git-lfs.github.com/

Hi everyone,
I have trouble with running the cyliner3d example. As soon as the parmmg process is reached the code exits:

## Warning: MMG5_intersecmet22: null metric det : 9.799319E-16

  ## Warning: MMG5_mmgIntextmet: impossible metric inersection: surfacic metric skipped.

  ## Error: MMG3D_defsiz_ani: unable to intersect metrics at point 4900.

  ## Metric undefined. Exit program.

  ## MMG remeshing problem. Exit program.

  ## Warning: MMG5_intersecmet22: null metric det : 7.169265E-17

  ## Warning: MMG5_mmgIntextmet: impossible metric inersection: surfacic metric skipped.

  ## Error: MMG3D_defsiz_ani: unable to intersect metrics at point 193.

  ## Metric undefined. Exit program.

  ## MMG remeshing problem. Exit program.

I found a discussion related to this issue (for mmg2d) on mmg forum and it looks like it was solved:
https://forum.mmgtools.org/t/mmg2d-null-metric-det-error/445

Versions of everything used:
Kratos: 9.4 (latest)
Parmmg: 1.4.0
Mmg: 5.6.0
gcc: 11.2.0
cmake: 3.27.0
openmpi: 4.1.5
lapacke: 3.9.1
python: 3.9.6
boost: 1.80.0
metis: 5.1.0
Thanks in advance,
Pierre

Hi! I think the beams Mmg remeshing examples don't work well. Possibly it's something in the app that hasn't been updated.

@rubenzorrilla, Who could look at them to try to make them work?

The examples are:

• beam_spr
• beam2D
• beam2D_internal_interpolation

I am a student at the Free University of Bozen-Bolzano, currently working on a study project using Kratos Multiphysics. I am using the FEAST SOLVER to calculate the mode shapes and eigenfrequencies of different components.
It works fine for eigenfrequencies up to ca 6000 Hz, but I am having problems getting results for higher frequencies. I tried to change the input parameters file "ProjectParameters.json", more precisely I increased the "lambda_max" up to 2100000000 which seems to be near to the maximum value for which the simulation is running. I understood that the input parameters like "lambda min" and "lambda max" are related to the search interval of the eigenfrequencies, but it is not clear to me for what they exactly stand for.
Any help would be appreciated!