CFD Online URL
[Sponsors]
Home > Forums > OpenFOAM

fvTensorMatrix equation solving ?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 7, 2011, 07:28
Default fvTensorMatrix equation solving ?
  #1
Senior Member
 
Join Date: Sep 2010
Location: France
Posts: 169
Rep Power: 6
T.D. is on a distinguished road
HI,
i have a tensorial equation to be solved for the tensor Y:

fvTensorMatrix YEqn

when i run the solver i see that:
smoothSolver: Solving for Yxx, Initial residual = 0.875064, Final residual = 1.60516e+149, No Iterations 1000
smoothSolver: Solving for Yxy, Initial residual = 0.686555, Final residual = 8.05809e+148, No Iterations 1000
smoothSolver: Solving for Yyx, Initial residual = 0.686555, Final residual = 8.05809e+148, No Iterations 1000
smoothSolver: Solving for Yyy, Initial residual = 0.872595, Final residual = 1.59013e+149, No Iterations 1000
smoothSolver: Solving for Yzz, Initial residual = 0.873874, Final residual = 1.60776e+149, No Iterations 1000

my question is, why Yyx is solved however it is symmetrical, and Yxz is never solved?

however In my defintion for Y, i defined it as a total general matrix volTensorField Y.
Is it the problem in the fvTensorMatrix Equation ? can it solves a tensorial equation for a general tensor Y? or only for symmetrical defined tensors?
any ideas ?

thanks,

T.D.
T.D. is offline   Reply With Quote

Old   April 9, 2011, 10:09
Default
  #2
Senior Member
 
Hrvoje Jasak
Join Date: Mar 2009
Location: London, England
Posts: 1,748
Rep Power: 20
hjasak will become famous soon enough
Looks like your mesh is 2-D or the missing components are uniform.

Hrv
__________________
Hrvoje Jasak
Providing commercial FOAM/OpenFOAM and CFD Consulting: http://wikki.co.uk
hjasak is offline   Reply With Quote

Old   April 10, 2011, 16:59
Default
  #3
Senior Member
 
Join Date: Sep 2010
Location: France
Posts: 169
Rep Power: 6
T.D. is on a distinguished road
hi thanks a lot prof. hjasak, i solved the problem, it was inside the choice of the solvers' settings in addition to the relaxation-factors.

thanks a lot

hope to meet soon at the 6th OpenFOAM Workshop in PENNSTATE
sincerely yours,
T.D.
T.D. 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
Moving mesh Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 07:20
Differences between serial and parallel runs carsten OpenFOAM Bugs 11 September 12, 2008 12:16
Unknown error sivakumar OpenFOAM Pre-Processing 9 September 9, 2008 13:53
IcoFoam parallel woes msrinath80 OpenFOAM Running, Solving & CFD 9 July 22, 2007 03:58
Could anybody help me see this error and give help liugx212 OpenFOAM Running, Solving & CFD 3 January 4, 2006 19:07


All times are GMT -4. The time now is 14:47.