CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

divergence detected in AMG solver

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

LinkBack Thread Tools Search this Thread Display Modes
Old   June 9, 2019, 16:50
Default divergence detected in AMG solver
Senior Member
Weiqiang Liu
Join Date: Feb 2018
Posts: 278
Rep Power: 9
Weiqiang Liu is on a distinguished road
Hi all,
I have a UDF in the model to define mass diffusion coefficients for the whole computation domain. However, fluent always pops error like 'divergence detected in AMG solver'
I am quite sure it's the problem of UDF. Because I tried to use kinetic theory to calculate mass transfer and perfect results can be got. Since I have almost 1000 lines of code in the UDF. I don't know how to check the error.
ps: UDF can be compiled and loaded without any error.
I put the residuals and error screenshot below. Can anybody give me some suggestions about what might be the reason for divergence?
Attached Images
File Type: jpg 2.jpg (60.3 KB, 5 views)
File Type: png error.png (12.1 KB, 7 views)
Weiqiang Liu is offline   Reply With Quote


divergence, mass diffusion, udf

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
Divergence detected in AMG solver: pressure correction xinquanzhoucn FLUENT 5 July 21, 2014 04:49
Divergence detected in AMG solver: temperature otubaba FLUENT 7 October 29, 2013 08:39
Floating point error and divergence detected aannjj FLUENT 0 July 2, 2013 03:44
3d vof Smaras FLUENT 2 February 19, 2013 06:58
Quarter Burner mesh with periosic condition SamCanuck FLUENT 2 August 31, 2011 11:34

All times are GMT -4. The time now is 08:20.