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

kOmegaSST convergence problem for swirling flow

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 3, 2017, 09:42
Default kOmegaSST convergence problem for swirling flow
  #1
New Member
 
Audrius
Join Date: Mar 2015
Posts: 6
Rep Power: 4
driu is on a distinguished road
Dear Foamers,

I have recently started using OpenFOAM and gradually ran into some convergence issues that I cannot tackle myself.

What I am trying to do is to compare my OpenFOAM simulation with a simulation done in ANSYS CFX.
The case is a swirl induced by turning vanes. Please find attached the geometry domain screenshot.

I am running the case with simpleFoam using kOmegaSST turbulence model.
Please see the case files attached or let me know if you require any specific details.


Now the problem is convergence in my OpenFOAM simulation. As soon as I try using second order divergence schemes, I get problems with convergence. I am quite lost where the problem is.

Please see the residual plot attached.

For comparison, the residuals in CFX go down below 1e-6 (RMS) or 1e-3 (max). I am using ‘High resolution’ Advection Scheme setting there.

I would really appreciate any guidance on this and apologies if it’s just another beginner level question.

Is there anything obvious I should check first or anything obviously wrong in the setup?

Many thanks for your time!

Kind regards,
Audrius
Attached Images
File Type: jpg Domain.JPG (23.7 KB, 6 views)
File Type: jpg Residuals.jpg (58.4 KB, 4 views)
Attached Files
File Type: zip case_files.zip (7.1 KB, 2 views)
driu is offline   Reply With Quote

Reply

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wing in compressible flow convergence problem frossi FLUENT 9 February 27, 2017 01:20
Cavity Flow Model Convergence Problem benderbending CFX 2 February 20, 2017 05:43
Two Mass flow inlet bc convergence problem nabidinhomessi Main CFD Forum 5 December 14, 2015 08:11
problem reaching convergence for 2D Aerofoil Turbulent FLow raz FLUENT 0 December 1, 2015 07:06
Problem with Convergence at high flow rates Syed CD-adapco 1 April 10, 2007 15:18


All times are GMT -4. The time now is 04:40.