Hi I was trying to convert the 3D beam found here FEniCSx. I am facing 2 issues. I was able to convert the code. But if i change the loading condition to concentrated load FEniCSx gives no solution for complicated mesh (For simple mesh works fine). the .xdmf file written can’t be opened by para…

[image] mohaiminul_islam_Mis: the .xdmf file written can’t be opened by paraview for Meshtags however opening mesh works fine. And if i try writing the write_function my Jupyter notebook crashes and restarts. For both of these cases you need to store the mesh to the XDMFFile (using '.write_me…

[image] mohaiminul_islam_Mis: zero = Function(W0) with zero.vector.localForm() as zero_local: zero_local.set(0.0) bcs = [ dirichletbc(zero, left_dofs_x, W.sub(0)), dirichletbc(zero, left_dofs_r, W.sub(1))] Here the second DirichletBC should use a zero function from W1, not W0. I…

Apologies, i linked the wrong example link. Here is corrected link

The new version of this demo should be available soon. For concentrated loadings, please be sure that you correctly identify and mark inner “facets” which are points in fact. To avoid any issue with XDMFFile on manifold meshes, use gmsh Python API instead

Thanks for the reply. There are couple of problems, Now i can write the meshtags, But when i open the .xdmf file to paraview, i can’t change the color or i don’t see the change in color for marked points. As for the write_function My Jupyter notebook still crashes for the below code if i change i…

[image] mohaiminul_islam_Mis: There are couple of problems, Now i can write the meshtags, But when i open the .xdmf file to paraview, i can’t change the color or i don’t see the change in color for marked points. Use the extract block filter to extract the meshtags from the multi-block syste…

Here is a simplified version where I load a simple mesh. define the function spaces and mark the domain. My Jupyter notebook still crashes when I write function. import matplotlib.pyplot as plt import numpy as np from mpi4py import MPI import basix from dolfinx.fem import (Function, FunctionSpace,…

Try the following: import matplotlib.pyplot as plt import numpy as np from mpi4py import MPI import basix from dolfinx.fem import (Function, FunctionSpace, dirichletbc, form, locate_dofs_topological,Constant,Expression, locate_dofs_geometrical, assemble_scalar) from dolfinx…

Thanks. now it works. However, i still can’t see colors for the marked points for the facet tags.

Converting legacy FEniCS code to FEniCSx causes issue

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mohaiminul_islam_Mis April 22, 2024, 3:52pm 6

Great. looking forward to the new examples.

How to properly map DoFs coordinates and displacements?

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Converting legacy FEniCS code to FEniCSx causes issue

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