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

Divergence detected in AMG solver: ads-0

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 25, 2011, 08:04
Default Divergence detected in AMG solver: ads-0
  #1
New Member
 
Join Date: Nov 2010
Posts: 4
Rep Power: 6
Patrino is on a distinguished road
hello,

i try to simluate a normal supersonic nozzle. everything worked fine before i wanted to improve my y+ value. therefore i increased the mesh size near the wall. if i run it now with the same values, i always get the error

Divergence detected in AMG solver: ads-0
Divergence detected in AMG solver: ads-1
.
.
.
.
Divergence detected in AMG solver: ads-0
Error: floating point exception
Error Object: #f

would be glad if anyone could help me

br
Patrino is offline   Reply With Quote

Old   August 25, 2011, 20:48
Default
  #2
Senior Member
 
Stuart Buckingham
Join Date: May 2010
Location: United Kingdom
Posts: 267
Rep Power: 16
stuart23 will become famous soon enough
Hi

Are you using the density based solver? Implicit or Explicit?

What AMG cycles are you running? V, W, F or flexi? Also did you increase the number of levels when you went up a mesh size?

Stu
stuart23 is offline   Reply With Quote

Old   August 26, 2011, 08:28
Default
  #3
New Member
 
Join Date: Nov 2010
Posts: 4
Rep Power: 6
Patrino is on a distinguished road
Hello,

I'm using density based solver implicit. Also using standard V cycles and I didn't improve the levels when i increased the mesh size. I only increased the mesh size near the wall so I get a lower y+ value.
Patrino is offline   Reply With Quote

Old   April 9, 2014, 10:40
Default
  #4
Member
 
shahid
Join Date: Oct 2013
Posts: 74
Rep Power: 3
shahid nadeem is on a distinguished road
Hello Dear FRiends can you tell me what does level means
shahid nadeem is offline   Reply With Quote

Old   April 18, 2014, 01:53
Default
  #5
New Member
 
jake sawn
Join Date: Apr 2014
Posts: 1
Rep Power: 0
jakeme is on a distinguished road
how‘s going that error? hey,brother,i need your help
jakeme 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
Quarter Burner mesh with periosic condition SamCanuck FLUENT 2 August 31, 2011 11:34
ERROR: divergence detected in AMG solver black mamba Main CFD Forum 0 April 19, 2010 15:15
divergence detected in AMG solver !!! yansheng FLUENT 0 September 27, 2007 11:22
DIVERGENCE detected in AMG solver ENTHALPY MANOJKUMAR FLUENT 2 December 25, 2005 10:54
divergence detected in AMG solver: Shekhar Jain FLUENT 1 September 18, 2003 09:31


All times are GMT -4. The time now is 07:36.