CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

pimpleFoam max Courant number is exceeded

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 6, 2018, 13:34
Default pimpleFoam max Courant number is exceeded
  #1
Member
 
Join Date: Sep 2018
Posts: 53
Rep Power: 7
tecmul is on a distinguished road
Hello,

I'm running a transient case with a moving mesh and the max Courant number set to 0.1. At certain times, the velocity field in a small unstructured part of the domain becomes unstable as the quality of the mesh in that region degrades, this is evident in the log file with the max courant number jumping to 0.7. The solver recognizes this and reduces the time step. After that, the instability is damped and the rest of the simulation continues without issue. The problem is, the velocity field at that particular time is ruined, I expected openFoam to ignore the results of that time step, go back and redo the calculations at the previous time step with a smaller delta t value.

Would it be possible to implement something like this?
tecmul is offline   Reply With Quote

Reply

Tags
adjustable time step, courant number, pimplefoam, variable time step

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
[General] Extracting ParaView Data into Python Arrays Jeffzda ParaView 30 November 6, 2023 22:00
multiphaseEulerFoam high Courant number Frenk_T OpenFOAM 5 November 24, 2016 04:23
multiphaseEulerFoam (OF2.3.0) : Courant number explodes when running in parallel Mehrez OpenFOAM Running, Solving & CFD 10 May 18, 2016 12:44
foam-extend_3.1 decompose and pyfoam warning shipman OpenFOAM 3 July 24, 2014 09:14
compressible flow in turbocharger riesotto OpenFOAM 50 May 26, 2014 02:47


All times are GMT -4. The time now is 06:20.