Elmer Discussion Forum

Hi

In the paraview (vtu file) do you see "stress zz" depicted?

Basically the volume stays constant only when Poisson ratio is 1/2. However, the change in density is not accounted for since usually the effect is minimal.

-Peter

Hi

How about "stress zz" ?

-Peter

Hi If you want to use save scalars then mass would be "operator 1 = volume" times the density. I think you can give volume "coeffcient 1 = density" to get the mass. As forces go, you could compute stresses and the take an "boundary int" over the desired stress component. Or you could calculate the r...

Hi You could study the problem on low frequency and study what happens there. However, there is no way, as far as I know, to use the low frequency model to estimate the high-frequency outcome. Maybe there is. The transient vs. harmonic choice should not have much impact on the required space resolut...

Hi David, Look at test case "ConstantBCTemperature". It uses linear constraints to enforce constant, yet unknown, temperature for a boundary. For electrostatics the BC would be in style, Boundary Condition 1 Name = "floating" Target Boundaries = 1 Potential Constant = Logical True End Have fun! -Peter

Hi What is your Reynolds Number? I.e. is the flow in the pipe turbulent or laminar. There is no difference whether you deal with the aspect ratio using unisotropic material parameter or huge aspect ratio. They should result to exactly the same linear systems. You should use extruded meshes such that...

Hi

I would not use that solver. Rather use StatElecSolver + RigidMeshMapper (or MeshSolver) instead, for example.

-Peter

Hi Markus It all boils down to wavenumber. Ultrasound is <2cm and hence if you want to study surroundings of cars you need at least 20 m which means at least 1000 waves. For each wave you need 10 elements. Make this 3D and you suddenly have 10^12 elements which cannot be done. So I would look at ray...

Hi What is the problem? Can the cross-capacitance of the pixels not explain this. If you have potential at either 0 or 100 I would guess that a mix would result to the highest energy. Note that you may introduce electrostatic energy when you set any Dirichlet condition, be it 0 or 100. Comparing jus...

Hi, you typically need to request "calculate stresses". Then you may operate with the stress as any other field variable. -Peter