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Showing results 1 to 6 of 6 Search took 0.00 seconds. Search: Posts Made By: mr_fluent

Forum: Main CFD Forum March 23, 2009, 20:23

Replies: 16 petsc and diverge Views: 5,521 Posted By mr_fluent i can only speak, english, hindi, portuguese,... i can only speak, english, hindi, portuguese, japanese. i can not speak chinise, though after few years when i am proficient in japanese i have desire to learn it.

Forum: Main CFD Forum March 23, 2009, 19:54

Replies: 16 petsc and diverge Views: 5,521 Posted By mr_fluent this is why use it only if you wish to solve it... this is why use it only if you wish to solve it once. it you have to solve it again and again.

Forum: Main CFD Forum March 23, 2009, 05:38

Replies: 16 petsc and diverge Views: 5,521 Posted By mr_fluent if you have to solve it only once then use lsqr... if you have to solve it only once then use lsqr method, it would not diverge no matter what you through at it. if you have written in little bit more detail about equations you are solving it...

Forum: Main CFD Forum March 23, 2009, 02:50

Replies: 16 petsc and diverge Views: 5,521 Posted By mr_fluent is there any way for you to print the matrix and... is there any way for you to print the matrix and then check if ap > sum(ali).

Forum: Main CFD Forum March 23, 2009, 02:34

Replies: 16 petsc and diverge Views: 5,521 Posted By mr_fluent the reason i said about diagonal dominance is... the reason i said about diagonal dominance is because you said nothing else is working. If matrix is diagonally dominant, even a normal method like gauss siedel would show some convergence. (though...

Forum: Main CFD Forum March 23, 2009, 01:56

Replies: 16 petsc and diverge Views: 5,521 Posted By mr_fluent make sure that what you are solving has diagonal... make sure that what you are solving has diagonal dominance in matrix. it seems that your matrix does not have this property, LU methods are somewhat less sensitive to this issue.

Showing results 1 to 6 of 6

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