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-   -   Error Message in Fluent (http://www.cfd-online.com/Forums/fluent/41033-error-message-fluent.html)

Tang Kuei May 19, 2006 04:59

Error Message in Fluent
 
Staggered, lam, 2D, with 2 uds. After several iterations, a error message comes out as follow, "divergence detected in AMG solver: uds-1"

What can I do for this problem?

When I try to use coupled method, I will never meet this condition.

cheers,

Siddharth Khowala May 19, 2006 07:03

Re: Error Message in Fluent
 
hi, i think there might be some problem with your first UDF,Just use the first UDF in isolation without using the other one in segregated solver.Divergence errors are generally observed when a quantity is being divided by zero.These errors i have experienced hence i think might be the case.Just check your udf ,if at the time of running your code somevalue becomes 0 and is it dividing something,then that might be the problem maybe u can write the entire data in a file and check them.Hope it helps

regards


TengKuei May 19, 2006 09:12

Re: Error Message in Fluent
 
My diffusivity and property are temperature dependent, so I need to do the iteration with coupled method?

Siddharth Khowala May 19, 2006 09:41

Re: Error Message in Fluent
 
hi I meant to say that if u have got to use both the udf together then it would be better to write the output in a file and check if any quantity in your first udf is being divided by zero by checking the files.

regards

TengKuei May 19, 2006 10:14

Re: thanks for your adivce
 
Dear sir,

Thank you very much!! I'm tryin' to do that

Regards,


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