Hi, I have questions about using the RBFMeshMotionSolver. I’m using pimpleFoam. I’ve read quite a few discussions on using the RBFMeshMotionSolver from solid4Foam with pimpleFoam. I am interested to use RBFMeshMotionSolver to replace the laplacian solver for prescribed mesh deformation in OF with 6…

Hi, I tried to change the deformation solver to the RBF one in the perpendicular-flap tutorial and it’s working too with solid4Foam.

Hi, no, I don’t think that the preCICE version matters. What I have done is to compile RBFMeshMotionSolver by itself (i.e. not with all S4F) against the current OpenFOAM version. and used it with preCICE. If this can help you, this simple case works for me with preCICE 3 and OpenFOAM 2312: test_RBF…

Hi @Claudio , I tried to run the code but it hangs at: Starting time loop ---[preciceAdapter] Loaded the OpenFOAM-preCICE adapter - v1.3.0. ---[preciceAdapter] Reading preciceDict... ---[precice] This is preCICE version 3.1.1 ---[precice] Revision info: no-info [git failed to run] ---[precice] …

Hi @quarkz at first sight it looks like your system is not able to find ccx_preCICE. Before removing anything from the case: you shoud install calculix and preCICE adapter. See for example here you shoud have ccx_preCICE now and it must be in your path (e.g. somewhere in .bashrc you should point…

Hi @Claudio , I have installed calculix and re-tested the case. It’s working perfectly. However, I guess u may have misunderstood my qn. I ran another case with solid4Foam and it’s also working. But I don’t need FSI for the moment. I just want to deform the grid using RBF in a prescribed way. Is ther…

Hi @quarkz , good to hear that. Unfortunately I don’t have anything ready to share at the moment. Why don’t you use the rigid_body_solver from the quickstart? You may configure it so that you impose the fluid mesh deformation from the “solid” (one way coupling or something like that, if this is your …

Hi @Claudio Thanks for the update. Ya, I’ll give it a try. Btw, you mention that RBF doesn’t work with large meshes. May I know what’s the size? Do stay in touch.

It doesn’t work in the sense that it tends to eat a lot of memory. In my case, with a medium workstation, 1M cells might be way too much to handle. Claudio

Hi @Claudio , 1M cells in 3D is quite small. Maybe if I run it on a cluster with much more memory, then it can work with larger cells.

Hi @quarkz indeed it is not very big. It happened to me to run fast into “std::bad_alloc” when initializing. I know that there are ways to reduce memory usage. For example you could use coarsening, but I was not able to find configurations using it effectively, also because I miss some information r…

HI, I followed these steps and the bin folder was created but there was no ccx_preCICE file in it, infact, it was the only file that was missing I also get the same error as quarkz

No deformation when using RBFMeshMotionSolver

Non-preCICE

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No deformation when using RBFMeshMotionSolver

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