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bug [resolved]: surface iteration did not converge

Posted: Tue Oct 25, 2011 12:09 pm
by lli5
Dear Delphi users,
Some user has reported a bug: "surface iteration did not converge"

This bug ocurrs when“scale”is set larger than 3.0, or grid is smaller than 0.3. It can be easily fixed by changing the line of "if( then" to be "if( then" in subroutine vwtms.

This fix will be included in the next release of Delphi.

DelPhi Development Team

Re: bug [resolved]: surface iteration did not converge

Posted: Thu Oct 15, 2015 1:47 am
by EbonyStarling
Which is the current update from DelPhi? I did not have a try yet, but have a curiosity to know it. I will not get the best explanation from anywhere else other than here. Please let me know how beneficial it is for me.

Re: bug [resolved]: surface iteration did not converge

Posted: Fri Apr 14, 2017 5:24 am
by Snelson192
Which is that the current update from Delphi? I didn't have an attempt, however, have a curiosity to understand it. I'll not get the most effective rationalization from anyplace else aside from here. Please let Pine Tree State skills helpful it's on behalf of me.

Re: bug [resolved]: surface iteration did not converge

Posted: Thu May 18, 2017 12:33 am
by bryanadams02
I want to simulate air movements in a room.
I have a converge problem. Also I got this error "BiCGStab did not converge !"
in the residual page, Tdr in k-epsilon diverge. Do you know how to solve the problem?
the surface mesh quality is higher than 0.5 and volume mesh quality is higher than 0.1.
Thanks in advance for your help

Re: bug [resolved]: surface iteration did not converge

Posted: Sat Jun 03, 2017 12:20 am
by DanielSwift
This is a warning to surface chemistry solver with no converge it needs to stabilize the flow of solve surface of this to not happened that error. Mostly the residuals don’t decrease in any case that would be at high level. Most of the users cannot understand the method in which they cannot concentrate to fix all the errors after taking this smaller help.

Re: bug [resolved]: surface iteration did not converge

Posted: Fri Jun 23, 2017 6:03 am
by milaarch02
Surface iteration did not converge

Re: bug [resolved]: surface iteration did not converge

Posted: Wed Sep 13, 2017 6:25 am
by leelachandran
I am trying to model a tapering tube through which a cell moves along with the liquid. I want to study the fluid as well as the cell dynamics. I used Fluid-Structure interaction, time-dependent solver for the same. It is a fine, physics-controlled mesh. When I run the simulation, there is an error in a short while saying "Nonlinear solver did not converge." And it also says trying to find real sqrt of negative number.
When I try at finer or extremely fine mesh resolution, it says, requested mesh quality could not be achieved.
When the same simulation was carried out in an even tube, without tapering, these errors did not arise.
What could be causing the problem? How do I correct it?

Re: bug [resolved]: surface iteration did not converge

Posted: Thu May 24, 2018 7:36 am
by ElishaGrace
I am simulating a surface reaction in FLUENT, finite-rate.
When the iteration stats, the following error shows up:

Warning: Surface chemistry solver did not converge for 203 cells/faces

I reduced the density under-relaxation. Also, I simulated the flow alone to stabilize the flow and after that started to solve surface chemistry, but the above error happened again.
Can anyone kindly help me to resolve this issue?

bug resolved surface iteration did not converge

Posted: Sun Jun 24, 2018 8:45 am
by MichaelRuino
Try editing them through setup.txt then. Its in the same folder as the executable.
Also, the latest SVN and Binary have the menus scale according to your resolution so that their size is fixed, so if youre using those it may seem at first like the resolution doesnt change.

Actually, Zefz and Birdsey but mostly Birdsey, he did that change AFAIK, can you make this feature optional? I like my GUI and menus smaller.