CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

Getting error when using bicgstab

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

LinkBack Thread Tools Display Modes
Old   July 23, 2012, 11:14
Default Getting error when using bicgstab
G. S.
Join Date: Nov 2010
Posts: 53
Rep Power: 9
gerardosrez is on a distinguished road
Hi cfd colleagues,

I'm using bicgstab method with ILU preconditioning to solve my linear systems on my CVFEM code.

When I solved the lid driven cavity flow the code worked fine, but now that I'm solving an inflow outflow problem I'm getting this error:

??? Error using ==> ilu
There is a pivot equal to zero. Consider decreasing the drop tolerance or
consider using the 'udiag' option.

I dropped the tolerance like MATLAB suggested without success...

Any idea about this issue???

Thanks in advance.....
gerardosrez is offline   Reply With Quote


bicgstab, collocated, cvfem, ilu, solver

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
calculation stops and BICGStab did not converge vandermessi STAR-CCM+ 1 March 6, 2012 04:19
TurbDyMFoam-Ggi JulytoNovember OpenFOAM Running, Solving & CFD 2 January 31, 2011 02:36
GGI in OpenFOAM hjasak OpenFOAM Running, Solving & CFD 59 April 30, 2010 08:30
[r] Need some help with bicgstab. sandy Main CFD Forum 1 March 3, 2008 12:10
BICGSTAB, MINRES, GMRES, ORTHOMIN??? carlos Main CFD Forum 1 June 12, 2002 18:52

All times are GMT -4. The time now is 02:08.