|
[Sponsors] |
December 29, 2017, 17:05 |
Floating Point Exception/Meshing/Temp Issue
|
#1 | |
New Member
Join Date: Dec 2017
Posts: 12
Rep Power: 8 |
I tried various solutions found in the forum to similar errors to this:
Quote:
I read that the issue lies within the temperature error. I don't quite understand how to resolve this. I ran a diagnostics on my mesh and it appears to check out. I'm trying to simulate -440F gas going into a tank. My max and min temps are set to -450F and 400F. Any suggestions on what might be occurring here? |
||
January 2, 2018, 03:57 |
|
#2 |
Senior Member
|
There can be many possibilities like mesh, solver etc. Need detail problem description and error report to comment something valuable. First if you are sure that mesh have no problems then you can check solver errors. Try retain temporary storage option to see which solver is starting the divergence.
|
|
January 2, 2018, 17:45 |
|
#3 |
New Member
Join Date: Dec 2017
Posts: 12
Rep Power: 8 |
Thanks Ashok,
I appreciate the help. So I fixed my mesh, and now I don't get the zeropoint error. However, I'm getting extremely high velocities at random points in my container. I have a spherical container where the fluid enters at the top through an inlet with 100 small orifices about .2 in in size. The inlet condition is mass flow at 3 lb/s. I didn't play with the temperatures. The Physics is Constant Density, Gas, Implicit unsteady, laminar, segregated flow, 3D. My inlet seems to be a reasonable value, but I get these large velocity spikes on the surface (see pictured). Do you have any suggestions on what might be causing these unrealistic velocity spikes in the solver? These spikes only occur in a single place per iteration (the spike moves around the geometry), the rest of the solution looks as expected. |
|
March 30, 2020, 12:34 |
|
#4 | |
New Member
smh
Join Date: Mar 2017
Posts: 1
Rep Power: 0 |
Quote:
Have you sovled the problem? I meet a similar problem as yours. The report is as follows: Wall distance limited to 1e-06 on 9 cells in innerField Computing Acoustic Suppression Zone boundary distance .. end. WARNING: insufficient precision on multigrid level 11, nRows = 284 AMG coarsening halted. Bi-Conjugate Gradient Stabilized solver did not converge ! WARNING: insufficient precision on multigrid level 10, nRows = 1133 AMG coarsening halted. Error: AMG solver diverged. A floating point exception has occurred: floating point exception [Invalid operation]. The specific cause cannot be identified. Please refer to the troubleshooting section of the User's Guide. Thanks in advance, It is very appreciated if you can give me some advice! |
||
Tags |
floating point exception |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[foam-extend.org] foam-extend 3.2 on Ubuntu 12.04, Floating point exception for tutorials | arsalan.dryi | OpenFOAM Installation | 7 | November 14, 2016 18:33 |
a reconstructPar issue | immortality | OpenFOAM Post-Processing | 8 | June 16, 2013 12:25 |
sprayEngineFoam - floating point exception error | ris | OpenFOAM Running, Solving & CFD | 3 | May 27, 2013 08:01 |
No convergence; floating point exception all the time | Tobi | OpenFOAM | 2 | September 19, 2012 05:01 |
MPI Error - simpleFoam - Floating Point Exception | scott | OpenFOAM Running, Solving & CFD | 3 | April 13, 2012 17:34 |