CFD Online Logo CFD Online URL
Home > Forums > Fluent Multiphase

Correcting random divergence

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

LinkBack Thread Tools Display Modes
Old   February 18, 2015, 13:07
Default Correcting random divergence
Christopher Hershey
Join Date: Feb 2012
Location: East Lansing, Michigan
Posts: 41
Rep Power: 7
Hershey is on a distinguished road
Dear CFD Community,

In my experience of transient flows, I have had highly coupled nonlinear solutions seemingly diverge unexpectedly during simulation. When monitoring the residuals throughout the simulation, each equation converges to a consistently minimum value, but after hours of simulating, the residuals will blow up with no clear distinction as to which equation was the problem.

Does anybody have an opinion to this matter or a plausible method to correct it or at least their own problems in the past?

I am using an unstructured hybrid mesh with the explicit VOF model. It is here that I am expecting the problem to arise. Thoughts?

Hershey is offline   Reply With Quote


divergence, explicit, unstructured, vof

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
Free Surface Ship Flow timfranke OpenFOAM Running, Solving & CFD 312 November 16, 2017 10:43
Floating Point Exception Error nyox FLUENT 8 January 22, 2016 08:53
[ANSYS Meshing] Help with element size sandri_92 ANSYS Meshing & Geometry 13 May 26, 2014 09:05
Divergence problem Smaras FLUENT 13 February 21, 2013 06:03
3d vof Smaras FLUENT 2 February 19, 2013 07:58

All times are GMT -4. The time now is 03:31.