Edit & build meshes with Python script

Edit & build meshes with Python script#

Overview#

SALOME can save all GUI operations as a Python script. This allows you to:

  • Modify geometry and mesh parameters without rebuilding from scratch

  • Automate mesh generation

  • Version-control your meshing workflow

Setup#

mkdir -p TRUST_tutorials/salome/exo5
cd TRUST_tutorials/salome/exo5

Copying the Python Script#

Copy the Python script from the previous exercise:

cp ../exo4/Mesh_1.py .
cp $TRUST_ROOT/doc/TRUST/exercices/salome/Coupled_pb.data .

Note: If you have not completed the previous exercise:

path=$TRUST_ROOT/doc/TRUST/exercices/salome
cp $path/Coupled_pb.py Mesh_1.py

Editing the Python Script#

Open Mesh_1.py in a text editor and make the following changes:

  • Add a mesh export command at the end of the script:

    Mesh_1.ExportMED("Mesh_1.med", 0)

  • Modify the geometry parameters:

    • Change box and cylinder height: 400 → 300

    • Change cylinder radius: 40 → 70

  • Modify the mesh parameters in NETGEN_3D_Parameters_1:

    • MaxSize: 48.9898 → 9.

    • MinSize: 6.97246 → 2.

  • Save and close the file

Generating the New Mesh#

Run the Python script in SALOME’s terminal mode:

$PathToSALOME/salome -t Mesh_1.py

The file Mesh_1.med will be generated in your folder. You will notice:

  • The box is smaller in the z-direction

  • The cylinder is thicker

  • The mesh is finer

Running the Calculation#

Run TRUST with the new mesh:

trust Coupled_pb

Advantages of the Python Workflow#

  • Reproducibility: Scripts document your exact meshing process

  • Parametric studies: Parameters can be easily modified for sensitivity analyses

  • Automation: Can be integrated into larger workflows

  • Version control: Scripts can be tracked with Git

  • Batch processing: Multiple meshes with different parameters can be generated automatically

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