Hello, I started with a 6-way coupling with OpenFOAM+CalculiX+XDEM. I have reduced from 6-way coupling to 4-way and now to 2-way since there seems to be an issue only in between OpenFOAM and CalculiX. I am using modified OpenFOAM solver PorouspimpleFoam, which takes into account for porosity in a…

@Makis Yes. I am looking into changing the orientation of CalculiX flap from XZ plane to XY plane. I will update once I have done the necessary changes. [image] Makis: @Alphaoo1 I have no idea how to do it in CalculiX, but probably you need to change something in the file Solid/pre_flap.fdb , …

Hi @Alphaoo1 , the explicit coupling is no surprise that it very soon leads to instabilities. I would stick to an implicit coupling scheme. I find it very strange that the implicit scheme crashes earlier than the explicit and I think these two are different issues. If you run the same case with as …

@Makis Thank you for your reply. I did start with the pimpleFoam solver instead of PorouspimpleFoam. I was able to run a 6-way simulation. But it seems that the domains are not aligned. [6-way_domain_mismatch] Is there way to change the orientation of the OpenFoam+Calculix domain from XZ to XY …

@Alphaoo1 I have no idea how to do it in CalculiX, but probably you need to change something in the file Solid/pre_flap.fdb , which is used as input for CGX (see Solid/mesh.sh ). If you manage to rotate the case, it would be a perfect contribution, as this issue is already open since longer and did n…

Amazing! :smiley: Next step: Try using RBF or Nearest-Projection mapping. It should fix the “staircase” shape of your flap.

Yes. Already done, it works just fine. :smile: [CCX_flap_disp_rbf_iso1]

OpenFoam fails with Floating point error

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OpenFoam fails with Floating point error

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