CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

I Really Desperate For Help, Floating Point Exceed

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 14, 2023, 05:20
Post I Really Desperate For Help, Floating Point Exceed
  #1
New Member
 
Agung
Join Date: Jun 2023
Posts: 4
Rep Power: 3
limowaagung11 is on a distinguished road
I Have model and i've been struggling for 5 days with this fluent issue. It always says that my floating point is exceeded and i have tried everything including re-meshing (Which doesn't have significant changes) and reducing timestep. Anything can help me. Can it be like a memory issue because I run this in really tight memory

My model have 13 m cell and i run it on Core I7, 16 GB RAM. the console error says

Stabilizing k to enhance linear solver robustness.

Stabilizing k using GMRES to enhance linear solver robustness.



Divergence detected in AMG solver: k Stabilizing omega to enhance linear solver robustness.

Stabilizing omega using GMRES to enhance linear solver robustness.



Divergence detected in AMG solver: omega Stabilizing temperature to enhance linear solver robustness.

Stabilizing temperature using GMRES to enhance linear solver robustness.



Divergence detected in AMG solver: temperature

Error at host: floating point exception
limowaagung11 is offline   Reply With Quote

Old   June 14, 2023, 12:55
Default
  #2
Senior Member
 
shereez234's Avatar
 
M Sereez
Join Date: Jan 2014
Location: England
Posts: 353
Blog Entries: 1
Rep Power: 13
shereez234 is on a distinguished road
Quote:
Originally Posted by limowaagung11 View Post
I Have model and i've been struggling for 5 days with this fluent issue. It always says that my floating point is exceeded and i have tried everything including re-meshing (Which doesn't have significant changes) and reducing timestep. Anything can help me. Can it be like a memory issue because I run this in really tight memory

My model have 13 m cell and i run it on Core I7, 16 GB RAM. the console error says

Stabilizing k to enhance linear solver robustness.

Stabilizing k using GMRES to enhance linear solver robustness.



Divergence detected in AMG solver: k Stabilizing omega to enhance linear solver robustness.

Stabilizing omega using GMRES to enhance linear solver robustness.



Divergence detected in AMG solver: omega Stabilizing temperature to enhance linear solver robustness.

Stabilizing temperature using GMRES to enhance linear solver robustness.



Divergence detected in AMG solver: temperature

Error at host: floating point exception

I don't think this a memory issue, as a base line setup I always run the simulation on a coarse mesh. Does that help? If that works, then go to medium or fine mesh.

Secondly, turn off equations for turbulence and let velocity and pressure settle for 300-400 iterations, then turn turbulence back on.
shereez234 is offline   Reply With Quote

Old   June 14, 2023, 14:00
Default
  #3
Senior Member
 
CFDKareem's Avatar
 
Kareem
Join Date: Nov 2022
Location: New York
Posts: 125
Rep Power: 5
CFDKareem is on a distinguished road
The divergence in the solver means that the numeric are diverging and leading to the floating point error.

I would double check your boundary conditions, mesh quality, and solver settings. This kind of divergence is common when you have poor mesh quality. A single mesh of very poor quality can lead to divergence in the solver.
__________________
Please like the answer if it helped!

Video Tutorials and Tips: https://www.youtube.com/@cfdkareem/featured
CFDKareem is offline   Reply With Quote

Reply

Tags
floating point exception, fluent, meshing

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Understanding The Floating Point Exception Error Message RussellHolt OpenFOAM Running, Solving & CFD 2 August 6, 2022 01:00
InterFoam based solver running into floating point error on restarting simulation Venky_94 OpenFOAM Running, Solving & CFD 9 November 23, 2021 17:53
Floating Point Exception Error nyox FLUENT 11 November 30, 2018 13:31
[snappyHexMesh] snappyHexMesh and cyclic boundaries Ruli OpenFOAM Meshing & Mesh Conversion 2 December 9, 2013 07:51
[snappyHexMesh] determining displacement for added points CFDnewbie147 OpenFOAM Meshing & Mesh Conversion 1 October 22, 2013 10:53


All times are GMT -4. The time now is 18:43.