Interpretation of continuity at interface in a homoganization problem

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I solved a periodic homogenization problem with fenics. As you see in the picture displayed in Paraview of sigma11 in the uniaxial x BC.

sigma11_axial_x
sigma11_axial_x811×481 70.9 KB

i tried to read the answers of this topic Continuity at interface between two subdomains but i don’t seem to quite understand :

  • The white fluctuations happening between the cells
  • The significance of 2 cells (super dark red and super dark blue ones)
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It would be great to know the following:

  • What spaces have you used for sigma?
  • How have you saved the data to a Paraview readable format (XDMFFile.write, XDMFFile.write_checkpoint or File.write)
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@dokken through File.write

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File.write gives you a CG 1 interpolation of the field you have in dolfin. For visualization of CG spaces >1 or DG spaces, you Need to use XDMFFile.write_checkpoint, see for instance: Loading xdmf data back in - #4 by dokken

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