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-   -   User-defined Convergence Criteria (http://www.cfd-online.com/Forums/fluent/116370-user-defined-convergence-criteria.html)

PorscheGTIII April 17, 2013 19:41

User-defined Convergence Criteria
 
Hello All!

I know that Fluent judges convergence of your solution by reaching a prescribed residual value. I also know that you should monitor properties such as lift, drag and moment coefficents to judge converge.

My question is, is there a way to add these monitor properties to the automatic convergence check that Fluent makes to the Residuals? Say you want the solution to be considered converged if the change in moment coefficient between timesteps in a transient run is less than a certain value and you want Fluent to recognize this and complete the simulation.

Is the capability apart of Fluent or can a UDF be written to do this? Is there already a UDF available for this?

Thanks!

vasava April 18, 2013 03:53

I am not sure about the UDF but you can write a scheme file to do so.

PorscheGTIII April 18, 2013 14:29

Quote:

Originally Posted by vasava (Post 421415)
I am not sure about the UDF but you can write a scheme file to do so.

Nice! Do you know of any scheme files that can do this or something similar that would be a good place to start?

vasava April 19, 2013 02:15

I have not done any Scheme programming my self but may be this webpage might be of some help to you. http://www.eureka.im/745.html


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