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-   -   udf from force to bc (http://www.cfd-online.com/Forums/fluent/45323-udf-force-bc.html)

mateus July 10, 2007 07:01

udf from force to bc
 
Hi!

I have yet another question that probably won't get answered...am I the only one who dealing with such "stupid" problems...I hope/think not.

Well, here we go.

I'm running an unsteady simulation. I need to write an UDF function where I calculate the forces on the body what is relatively simple but...then I need to use the calculated force to define the boundary condition for the next time step. The problem I have is that Fluent calculates the force in every iteration and also adjusts the boundary conditions at every iteration...this of course ends in divergence.

If anybody has any idea, please let me know...

Have fun Mateus


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