Hello, I am working on a 2D hyperelasticity problem. L = 1. # total length d = L/10. # thickness h = d/6. # size of a cell my_domain = dolfinx.mesh.create_rectangle(comm=MPI.COMM_WORLD, points=((0.0, -0.5*d), (L, 0.5*d)), n=(int(L/h), int(d/h)), …

You need to provide the domain to dolfinx.fem.Constant, i.e. u.interpolate(dolfinx.fem.Constant(my_domain, (0., 0.))) See dolfinx/function.py at main · FEniCS/dolfinx · GitHub

thanks! now I get this strange warning: WARNING:UFL:Couldn't map 'c_4' to a float, returning ufl object without evaluation. I’ll try to write a minimal code to reproduce the error…

Did you take care to be consistent between real and complex numbers ? If you have PETSc compiled for real numbers, and feed it a complex it will understandably complain.

Initialize function to 0 in dolfinx

dolfinx

dokken October 13, 2022, 9:47am 5

If you simply want to initialize it to zero, I would suggest
u.x.set(0)

WARNING:UFL:Couldn't map 'c_3' to a float, returning ufl object without evaluation

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Initialize function to 0 in dolfinx

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