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

pUCoupledFoam unstable

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 16, 2022, 12:43
Default pUCoupledFoam unstable
  #1
New Member
 
Join Date: Dec 2018
Posts: 6
Rep Power: 7
crpvn is on a distinguished road
Hello,


I'm trying pUCoupledFoam solver from foam-extend 5.0 with backwardFacingStepTurbulent tutorial.
The solver seems to be very unstable and run diverges also with the default setup.

Does anyone have experience with this solver?
Any suggestion will be appreciated.

Thank you in advance
crpvn is offline   Reply With Quote

Old   December 28, 2022, 21:38
Default
  #2
Senior Member
 
Hrvoje Jasak
Join Date: Mar 2009
Location: London, England
Posts: 1,905
Rep Power: 33
hjasak will become famous soon enough
I wrote it ‘works for me”.

If you are running a tutorial, it must work without change. Please drop me an email and I’ll have a look.

For general guidance, you need to be careful with the outlet boundary condition. Where u is fixed, p cannot be and vice versatile. For fixedValue bc, this is clear but if you are using eg inletOutlet on U, then p condition is outletInlet

Hrv
__________________
Hrvoje Jasak
Providing commercial FOAM/OpenFOAM and CFD Consulting: http://wikki.co.uk
hjasak is offline   Reply With Quote

Reply

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
Simulation Unstable in buoyant simulation jammy4536 OpenFOAM Running, Solving & CFD 2 December 2, 2020 07:26
pimpleFoam, rhoPimpleFoam unstable at small Courant numbers (time-steps) peob OpenFOAM Running, Solving & CFD 18 November 13, 2020 13:56
New Solver for a modified pUCoupledFoam noiseMaker OpenFOAM 0 August 2, 2016 06:14
Natural Convection Unstable alireza_ark Main CFD Forum 0 July 29, 2014 13:44
Unstable stratification khaiching Main CFD Forum 0 June 8, 2006 20:25


All times are GMT -4. The time now is 09:43.