A mesh modeling interface to the Gmsh-Python-API
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 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 and well-known unit cells with different types of inclusions. 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 within a nice and easy to use environment such as Python.
GmshModel is available from the Python Package Index and can be installed using the following command:
$ python3 -m pip install gmshModel
The integration of gmshModel into the conda-forge channel allows to use a similar procedure for Conda users:
$ conda install -c conda-forge gmshModel
GmshModel is an interface tool and makes use of many great contributions of other people. To experience the full functionality of Gmsh model, the following (non-standard) software packages are required:
To generate the above periodic box in a [20x20x20] domain which contains 200 spherical inclusions of radius 1, simply type:
# 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()
The gmshModel documentation is available here.
GmshModel is published under the GPLv3 license
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