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

courant number increases to rather large values

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

Like Tree14Likes

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 8, 2019, 11:55
Default
  #21
New Member
 
Snigdha Ghosh
Join Date: Nov 2019
Posts: 6
Rep Power: 6
Snigdha is on a distinguished road
Hi,
Thanks for your quick reply. I will do the splitting as you said and try to perform the simulation. Can you just explain a bit about why it shall be broken into inlet and outlet condition as I set my liquid in between the gap between two spheres from the beginning.
Snigdha is offline   Reply With Quote

Old   November 10, 2019, 11:14
Default
  #22
New Member
 
Snigdha Ghosh
Join Date: Nov 2019
Posts: 6
Rep Power: 6
Snigdha is on a distinguished road
Hi Ruben,
As you said I have changed the boundary condition in the faces which are grooved by the spheres as inlet and outlet conditions and other faces of the block I kept as the wall. It ran well. Thanks. If possible, can you tell me what was going wrong with the previous boundary conditions?
Snigdha is offline   Reply With Quote

Old   July 6, 2023, 00:48
Default I can run my simulation using Laminar(simple and pimple) but not with kOmegaSST
  #23
Senior Member
 
Farzad Faraji
Join Date: Nov 2019
Posts: 204
Rep Power: 7
farzadmech is on a distinguished road
Hello everyone
I can run my simulation using Laminar(simpleFoam (steady) and pimpleFoam (transient)) but not with kOmegaSST, and when I want to run(simpleFoam (steady) or pimpleFoam (transient), code blows up due to courant number using pimpleFoam-kOmegaSST(as you see in the picture I have attached). This is a challenging question for me why I can simulate my problem using Laminar model but not with RANS(kOmegaSST) model. Is my mesh quality not good enough for RANS simulation?

Laminar-Steady ===> works
Laminar-Transient ===> works

RANS(kOmegaSST)-Steady ===> code blows up
RANS(kOmegaSST)-Transient ===> code blows up


Thanks,
Farzad
Attached Images
File Type: jpg Figure.jpg (120.3 KB, 2 views)
farzadmech 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
Foam::error::PrintStack almir OpenFOAM Running, Solving & CFD 91 December 21, 2022 05:50
[mesh manipulation] Mesh Refinement Luiz Eduardo Bittencourt Sampaio (Sampaio) OpenFOAM Meshing & Mesh Conversion 42 January 8, 2017 13:55
Weird AMI Courant Number Vyssion OpenFOAM Running, Solving & CFD 3 April 13, 2016 03:31
Could anybody help me see this error and give help liugx212 OpenFOAM Running, Solving & CFD 3 January 4, 2006 19:07
[Commercial meshers] Trimmed cell and embedded refinement mesh conversion issues michele OpenFOAM Meshing & Mesh Conversion 2 July 15, 2005 05:15


All times are GMT -4. The time now is 04:08.