Elmer Discussion Forum

Following this question , I want to use Elmer to calculate deformation and stresses in a thin axisymmetric elastic disk over a vacuum hole: https://i.stack.imgur.com/YpVCj.png where r1 is the radius of the hole r2 is radius of the disk 𝜌1 is radius of the fillet which after loading should look like ...

Posted a follow-up question here on cfd-online, trying to do the simulation in OpenFOAM.

what should be the setting for Stabilize/Bubbles in Navier-Stokes equations solver? Which one should be Logical False and which one True, in my case?

Looking at some other posts, I wonder if Elmer supports turbulent flow for compressible materials?

According to this post by Peter , when this error happens there are multiple possibilities: increasing the Linear System Max Iterations increasing the Linear System Convergence Tolerance use a better preconditioner "Linear System Preconditioning" Using a different iterative method, the dir...

Kevin,

there must be a flow due to gravity/buoyancy leading to free convection. Is your case, also there is none.

Looking at Natural convection test examples, I see that I didn't have a Body Force: Body Force 1 Name = "Bouancy" Boussinesq = True End I also added some other Material Properties: Material 1 ! ..... Reference Temperature = 300 Heat expansion Coefficient = 3.43e-3 ! ..... End which I copie...

the first attempt for the .sif file isn't that promising. Basically, everything is static. There is no convection!

Temperature distribution

I think this should be the correct way to define the boundries:
Checked in ElmerGUI and seems to be OK.

Now moving to the .sif file.

Kevin,

I still don't know how to write the Boundary Definitions section. Can you be kind to help me with that?

Best,
F.