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Search took 0.00 seconds. Search: Posts Made By: mb.pejvak
Forum: Main CFD Forum May 30, 2013, 21:47
Replies: 7
Views: 1,796
Posted By mb.pejvak
I implemented BICGSTAB(l) in NS equations, but...

I implemented BICGSTAB(l) in NS equations, but unfortunately it does not work well. after only one iteration in SIMPLER algorithm, it diverges. I don't know why? I check the code and make necessary...
Forum: Main CFD Forum April 20, 2013, 01:50
Replies: 7
Views: 1,796
Posted By mb.pejvak
Dear Friends; I select BICGSTAB(l) for the code...

Dear Friends;
I select BICGSTAB(l) for the code that I have developed (NS, SST K-Omega turbulence model, Gamma-Retheta transition model equations) to increase the speed of convergence in this code....
Forum: Main CFD Forum April 15, 2013, 23:42
Replies: 7
Views: 1,796
Posted By mb.pejvak
another thing that I faced is BICGSTAB weak point...

another thing that I faced is BICGSTAB weak point in some cases in which A has imaginary eigenvalue, and it causes the method to break down (BICGSTAB(L) FOR LINEAR EQUATIONS INVOLVING UNSYMMETRIC...
Forum: Main CFD Forum April 10, 2013, 22:00
Replies: 7
Views: 1,796
Posted By mb.pejvak
Dear rmh26; Thank you so much. I plan to do it...

Dear rmh26;
Thank you so much. I plan to do it in a way that you recommended, but I am not sure about this remedy. I want to amend coefficient matrix after 10 BICGSTAB iterations based on the value...
Forum: Main CFD Forum April 9, 2013, 23:25
Replies: 7
Views: 1,796
Posted By mb.pejvak
I found that BICGSTAB is better choice, but I...

I found that BICGSTAB is better choice, but I face a problem in implementing it in navier-stocks equation. due to coefficient matrix [A] depends on the velocity (unknown matrix [x]) in each iteration...
Forum: Main CFD Forum April 7, 2013, 03:45
Replies: 7
Views: 1,796
Posted By mb.pejvak
conjugate gradient squared method

Hi friends;

I plan to implement a non-stationary relaxation method on the code I developed (modeling transition by Gamma-Retheta transition model).
did anyone work with this method?
can it be...
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