CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

X- momentum divergence in 2D axisymmetric model

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 29, 2015, 10:53
Default X- momentum divergence in 2D axisymmetric model
  #1
New Member
 
Harold Jankowski
Join Date: Jan 2015
Posts: 6
Rep Power: 11
hjan23 is on a distinguished road
Hey to all experts out there,
I'm simulating an axisymmetric 2D-model for a rotary kiln. The 3D-model has worked properly, however in order to reduce the calculation effort I want to also build a 2D-model.
I have defined it as an axisymmetric model in fluent and have also built my model on the XY-plane along the x-axis, which is the standard symmetry-axis if I got that right.

Here comes my problem:
Whenever I start the simulation I get the following message after one Iteration:

Error: Divergence detected in AMG solver: x-momentum
Error Object: #f

I have already done some Internet research, but nothing so far could fix my problem.

Thanks to everyone who can contribute to this problem,
hjan
hjan23 is offline   Reply With Quote

Old   January 30, 2015, 10:36
Default
  #2
Senior Member
 
Cees Haringa
Join Date: May 2013
Location: Delft
Posts: 607
Rep Power: 0
CeesH is on a distinguished road
I'm not sure if this may cause a divergence error, but is your symmetry axis exactly on the x-axis? if it is off by just a little bit, axisymmetric calculation will give an error. I'm just not sure at what point.
CeesH is offline   Reply With Quote

Old   January 30, 2015, 17:11
Default
  #3
New Member
 
Harold Jankowski
Join Date: Jan 2015
Posts: 6
Rep Power: 11
hjan23 is on a distinguished road
Thanks for the reply, first of all.

I checked my mesh and it said my geometry starts exactly at y=0.
I also built another geometry, and had the same problem again, so I guess that was not the problem :/
hjan23 is offline   Reply With Quote

Reply

Tags
axisymmetric 2d fluent

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
Problem in initializing transient simulation with a finer mesh sidd CFX 8 April 29, 2016 03:25
Dynamic mesh simulation (pimpleDyMFoam) problem sidlof OpenFOAM Running, Solving & CFD 6 April 12, 2013 12:24
simulation problem -- convection BC pras FLUENT 4 January 30, 2013 11:41
[ANSYS Meshing] Problem with axisymmetric solver Rasel ANSYS Meshing & Geometry 0 June 20, 2012 05:35
Large-scale simulation problem Purushothama Main CFD Forum 0 November 7, 2010 21:12


All times are GMT -4. The time now is 21:59.