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-   -   Conjugate-Gradient solver did not converge! (http://www.cfd-online.com/Forums/star-ccm/129024-conjugate-gradient-solver-did-not-converge.html)

sazrul January 26, 2014 20:40

Conjugate-Gradient solver did not converge!
 
Hi experts,

Currently I am running an Under hood Thermal Management analysis using Star-ccm+ v8.06.005. However, I am facing this error; 'Conjugate-Gradient solver did not converge' while I am trying to run the solution.

Can anyone tell me what does this error means? What should I do to fix it?

Your kind help is highly appreciated :).

Regards,
Sazrul
Kuala Lumpur.

ignat January 29, 2014 08:19

Quote:

Originally Posted by sazrul (Post 471908)
Hi experts,

Currently I am running an Under hood Thermal Management analysis using Star-ccm+ v8.06.005. However, I am facing this error; 'Conjugate-Gradient solver did not converge' while I am trying to run the solution.

Can anyone tell me what does this error means? What should I do to fix it?

Your kind help is highly appreciated :).

Regards,
Sazrul
Kuala Lumpur.

It is not serious problem. CG method is used for acceleration pressure solver and this message means only that your task is calculated without acceleration.

You may switch off CG and this message the following way.
Select:

Solver->Segregated Flow->Pressure->AMG Linear Solver->Acceleration method->None


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