Elmer Discussion Forum

Hello, Looking at the end of the solver log, where the heat solver doesn't converge, these rows appear: IterSolve: Linear iteration did not converge to tolerance ComputeChange: NS (ITER=2) (NRM,RELC): ( 0.38565092E+37 1.9979994 ) :: heat equation HeatSolve: iter: 2 Assembly: (s) 0.14 0.28 HeatSolve:...

I'd say that is a very good guess...

See attached modified sif file.

Rich.

Attached is another example. Apply a load on the cantilever beam, StressSolver calculates the strain, then StatElecSolver uses the strain to calculate electrical potential.

Rich.

There is a related example in 'elmerfem/src/tests/piezo'. If you have tried running this example, does it help with your situation?

Rich

Is this another Windows 10 issue? MAIN: MAIN: ------------------------------------- MAIN: Steady state iteration: 1 MAIN: ------------------------------------- MAIN: ComputeChange: NS (ITER=1) (NRM,RELC): ( 279.22668 2.0000000 ) :: heat equation ComputeChange: NS (ITER=2) (NRM,RELC): ( 279.22668 0.0...

While trying to run the case, I had to add some '$' to provide matc calculations, such as: Heat Transfer Coefficient = $1/0.04 Then I got this warning: WARNING:: VtuOutputSolver: Vtu time collection requires a transient simulation! So I commented out the result output solver, and changed 'Post File ...

Hello, The message says that the solution did not converge. Also in your attached solver log, this message occurs multiple times: ERROR:: ElementMetric: Degenerate 3D element: 32680 ElementMetric: Body Id: 1 DetG: 0.000000E+00 ElementMetric: Node: 1 Coord: 1.826950E-03 -1.730610E-02 0.000000E+00 Ele...

Changing just "linear system residual output = 1" and running shows that IterSolve gets to iteration 9 before NAN occurs. See the attached solver log.

Rich.

The load in the problem is a body force 'Temperature' keyword. I couldn't find that keyword in Elmer Models Manual in Heat Equation. I also couldn't find a test case using that keyword, but that may be just because looking through the tests for Temperature returns lot's of entries that are mostly in...

It seems that the crash happens in the heat solver in temperature iteration 1, so the stress solver is initialized but never started. Would the unfixed rigid body issue still be present? Rich. Edit: I edited the mcase.sif, removing the stress solver completely leaving just the heat solver. The same ...