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

Convergence Problem for Multiphase flow

Register Blogs Community New Posts Updated Threads Search

 
 
LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
Old   September 6, 2018, 07:09
Exclamation Convergence Problem for Multiphase flow
  #1
New Member
 
Naveen
Join Date: May 2018
Posts: 2
Rep Power: 0
Naveen Cheruku is on a distinguished road
Hello,

I am doing Detailed Simulation of Fuel cell with almost 70 million cells.
The model worked for single phase flow and i got good convergence and results.

But when I change the model to Multi-phase, even the Flow solver is diverging with the same initial conditions as in single phase case and with the results (Pressure and velocity) of single phase as initial conditions for the multi-phase case.

I am playing around with the damping factors, convection methods (1st and 2nd order) but there is no use.

Flow conditions:
steady,Turbulent with k-epsilon, Eulerian multiphase

Output window is showing as some warnings as follows:
Pressure corrections limited on ------
Turbulent viscosity limited on -------
reversed flow

Can someone help me on this.

Thanks and regards,
Naveen
Naveen Cheruku is offline   Reply With Quote

 


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
Wing in compressible flow convergence problem frossi FLUENT 9 February 27, 2017 00:20
Cavity Flow Model Convergence Problem benderbending CFX 2 February 20, 2017 04:43
Two Mass flow inlet bc convergence problem nabidinhomessi Main CFD Forum 5 December 14, 2015 07:11
problem reaching convergence for 2D Aerofoil Turbulent FLow raz FLUENT 0 December 1, 2015 06:06
Problem with Convergence at high flow rates Syed Siemens 1 April 10, 2007 15:18


All times are GMT -4. The time now is 11:42.