CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > Siemens > STAR-CCM+

Problem in a simple case

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 8, 2016, 11:33
Default Problem in a simple case
  #1
New Member
 
Join Date: Sep 2016
Posts: 8
Rep Power: 7
donfrulli is on a distinguished road
Dear all,

I would like to make a simple simulation on air flow in a pipe with a restrictor. The simulation is not converging correctly and I got these errors:

Temperature corrections limited on 615 cells in Region
Minimum Temperature limited to 100 on 924 cells in Region
Turbulent viscosity limited on 13771 cells in Region

My continua settings are: gas, steady, segregated fluid temperature, ideal gas, k-epsilon turbulance. I'm not even sure what are the correct settings.
My experiment looks like this: I put 2 cylinders on each other and I put 4 CDs in between them. I generate a depression from below.

Any ideas what can be the problem?
donfrulli is offline   Reply With Quote

Old   December 9, 2016, 08:32
Default
  #2
Member
 
Nils Hennig
Join Date: Apr 2015
Posts: 44
Rep Power: 8
Fiedde1887 is on a distinguished road
Looks like a mesh-issue. Create a theshold for temperature for example and lokate the Region, where your solution have the unrealistic temperature. After that, you can fix your mesh.
Fiedde1887 is offline   Reply With Quote

Old   December 9, 2016, 09:01
Default
  #3
New Member
 
Join Date: Sep 2016
Posts: 8
Rep Power: 7
donfrulli is on a distinguished road
For now this indeed looks like a mesh issue because no matter what I did, STAR used trim mesh all the time (even when I set it to poly)
Thanks!
donfrulli 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
[DesignModeler] DesignModeler Scripting: How to get Full Command Access ANT ANSYS Meshing & Geometry 53 February 16, 2020 16:13
Simple channel case using cyclicAMI will not converge cbcoutinho OpenFOAM Running, Solving & CFD 3 August 4, 2015 13:28
A simple tube FSI case can't converge stickjohnson OpenFOAM 1 June 23, 2014 22:42
Trouble with simple AMI case Horus OpenFOAM 0 February 26, 2013 10:31
? Simple CFD problem Davy Main CFD Forum 0 August 21, 1998 07:19


All times are GMT -4. The time now is 08:09.