read( mvc_1, "tag") print( "Constructing MeshFunction from MeshValueCollection") boundaries = cpp. load( f) with XDMFFile( "mesh/line.xdmf") as infile: print( "Reading 1d line data into dolfin mvc") infile. mvc_1 = MeshValueCollection( "size_t", mesh, 1) #for curve with dim 1 mvc_2 = MeshValueCollection( "size_t", mesh, 2) #for surface with dim 2 #import the json file so that tag names can be used f = open( 'mesh/tags.json') tags = json. # Define mesh mesh = Mesh() with XDMFFile( "mesh/triangle.xdmf") as infile: infile. So you have to create two mesh function corresponding to curve and surface mesh entity. In this case we are marking the boundary condition in curve mesh entity and the material subdomain is marked in the surface mesh entity. In FEniCS, we can make use of this by creating the mesh function corresponding to the mesh entities. All the files in mesh folder is used in the main script and the files in the sub_domains folder can be used to ensure if all the different sub domains are marked properly by visualizing the. meshx plate.mshĪs a output you will be getting two folders namely – “mesh and sub_domains”. msh file and use the following command to convert. Open the terminal and go to the folder containing the. Script for this is : Point( 1) = Īfter creating the. Įxample : Consider a rectangle section with four boundary condition, and two materials. This tool Meshx will only work if the Physical groups are marked properly. Mark all the different boundary and loading condition using the different Physical groups in Gmsh. Step by step procedure :Ĭreate the mesh file in Gmsh. You can get the complete installation instruction here. MeshxĪ simple tool to convert mesh created from Gmsh to XDMF for use in FEniCS. In this post I will mainly focus on Gmsh because thats what I mostly prefer to use as it is an open-source GUI-based package.
#Fenics and gmsh how to
Check this post to know how to use Nastran file (.bdf) from Ansys to FEniCS.
As it allows us to use different packages (Gmsh, Ansys, Abaqus etc) for complex geometry modeling and meshing. This makes our job much more easier and simpler. In FEniCS we have an option of importing the mesh geometry in. How to use MeshX to convert the mesh file from Gmsh to XDMF file in FEniCS
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