Running preCICE on a Cluster: The linear system of the RBF mapping from mesh Solid-Mesh to mesh Fluid-Mesh has not converged

[JulianSchl]

@uekerman

Your support radius is definitely too large. You get a dense mapping matrix and GMRES might have problems. Try 3-7 times your mesh width.

I now ran different radiuses (0.5, 0.8, 1) with the same issue.

@uekerman

You can use the vtk export of preCICE . Is this what you already do? Why do you get many files?

Maybe I selected the wrong output files, as there are many when using the RBF mapping.
The following files are available (only the fluid participant has time to create its files):

view list of files

Fluid-Mesh-Fluid.dt1_master.pvtu   Solid-Mesh-Fluid.dt1_r1.vtu
Fluid-Mesh-Fluid.dt1_r0.vtu        Solid-Mesh-Fluid.dt1_r2.vtu
Fluid-Mesh-Fluid.dt1_r1.vtu        Solid-Mesh-Fluid.dt1_r3.vtu
Fluid-Mesh-Fluid.dt1_r2.vtu        Solid-Mesh-Fluid.dt1_r4.vtu
Fluid-Mesh-Fluid.dt1_r3.vtu        Solid-Mesh-Fluid.dt1_r5.vtu
Fluid-Mesh-Fluid.dt1_r4.vtu        Solid-Mesh-Fluid.dt1_r6.vtu
Fluid-Mesh-Fluid.dt1_r5.vtu        Solid-Mesh-Fluid.init_master.pvtu
Fluid-Mesh-Fluid.dt1_r6.vtu        Solid-Mesh-Fluid.init_r0.vtu
Fluid-Mesh-Fluid.init_master.pvtu  Solid-Mesh-Fluid.init_r1.vtu
Fluid-Mesh-Fluid.init_r0.vtu       Solid-Mesh-Fluid.init_r2.vtu
Fluid-Mesh-Fluid.init_r1.vtu       Solid-Mesh-Fluid.init_r3.vtu
Fluid-Mesh-Fluid.init_r2.vtu       Solid-Mesh-Fluid.init_r4.vtu
Fluid-Mesh-Fluid.init_r3.vtu       Solid-Mesh-Fluid.init_r5.vtu
Fluid-Mesh-Fluid.init_r4.vtu       Solid-Mesh-Fluid.init_r6.vtu
Fluid-Mesh-Fluid.init_r5.vtu       Solid-Mesh-Solid.dt1.vtk
Fluid-Mesh-Fluid.init_r6.vtu       Solid-Mesh-Solid.dt2.vtk
Solid-Mesh-Fluid.dt1_master.pvtu   Solid-Mesh-Solid.final.vtk
Solid-Mesh-Fluid.dt1_r0.vtu

When I try to view Fluid-Mesh-Fluid.init_master.pvtu or Fluid-Mesh-Fluid.dt1_master.pvtu, paraview doesn’t show anything (scale in glyph is automatically very small and increasing it doesn’t help).
Now Fluid-Mesh-Fluid.init_r*.vtu looks like that:

view screenshots

Blue: Fluid mesh (Fluid-Mesh-Fluid.init_r*.vtu)
Red: Solid mesh (Solid-Mesh-Fluid.init_master.pvtu)

@uekerman

I meant to mesh really the same geometry with fluid and solid. Not to have this additional “closure”. I was referring to:

At the end it should be closed at the side … and as you know it works on my local machine ^^
Also since I didn’t create the fluid solver case this would be quite some work for a dummy case,
so maybe first try some other things before …

I tried the visualization of the same case on my machine:

view screenshots

In my eyes the mesh looks good, what do you think?