Gmsh is a powerful tool for the generation of meshes for numerical simulations but the built-in scripting language makes the meshing procedure and especially an automatization really hard. Luckily, Gmsh provides a Python-API with which all the capabilites of Gmsh can be used within Python.
GmshModel is intended to be an extendable tool that facilitates the mesh generation by interfacing the Gmsh-Python-API: it provides a basic framework for an automated mesh generation for self-defined model types and, with that, allows to automate the generation of complex models as, e.g., representative volume elements. To this end, GmshModel divides the mesh modeling procedure into basic steps:
- Setting up a geometry using basic geometric entities and boolean operations.
- Adding the geometric objects to Gmsh, performing the boolean operations and defining physical groups.
- Creating a mesh with user-defined refinement fields.
- Saving the mesh to various output formats.
- Visualizing the resulting mesh.
So far, GmshModel is especially designed to automate the generation of representative volume elements that contain multiple inclusion objects. An extension of gmshModel is however possible by adding new geometric objects and model types to the framework.
It is not the purpose of GmshModel to replace the Gmsh scripting language or other great tools such as PyGmsh for the generation of meshes. GmshModel rather tries to function as an interface to Gmsh to facilitate the automation of recurring, complex meshing tasks that require the full functionality of Gmsh in a nice and easy to use programming environment such as Python.
To get all information on how to install gmshModel, see Installation.
If you are using
pip, simply use the following command to install gmshModel
and its features:
$ python3 -m pip install gmshModel
conda users, the installation command is straightforward, too:
$ conda install -c conda-forge gmshModel
To check out what you can do with gmshModel and generate the above periodic mesh
200 randomly placed spherical inclusions of radius
1 in a
domain, simply use the following code:
# import required model type from gmshModel.Model import RandomInclusionRVE as RVE # initialize new RVE myRVE=RVE(size=[20,20,20], inclusionType="Sphere", inclusionSets=[1, 200]) # create Gmsh model myRVE.createGmshModel() # generate mesh myRVE.createMesh() # save resulting mesh to vtk myRVE.saveMesh("myRVE.vtk") # visualize result myRVE.visualizeMesh() # finalize Gmsh-Python-API myRVE.close()
Go to Examples to check out more examples of meshes generated using gmshModel.
Here, you can find out how gmshModel works, which classes and methods are involved and how you can use them to generate your own model:
- Geometry gives information on available geometric objects
- Model explains all available models
- Visualization gives information on the visualization capabilities of gmshModel
- MeshExport comments on additional mesh output formats (extending meshio)