CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   STAR-CCM+ (http://www.cfd-online.com/Forums/star-ccm/)
-   -   unsteady external force (http://www.cfd-online.com/Forums/star-ccm/79138-unsteady-external-force.html)

colorforadollar August 13, 2010 13:39

unsteady external force
 
I'm a long time CFD user but just recently switched over to STAR-CCM+ for this particular project. I need to evaluate it's response to an external force, however, this force is unsteady. I have a discrete time-history or I can parametrize it as a function.

Can STAR-CCM+ handle an unsteady function in the force vector? How do I specify it, I haven't noticed any ability to include UDFs like in CFX or Fluent?

f-w August 16, 2010 16:38

Haven't actually done it, but looks like the capability is there. You should be able to reference a user field function in the direction and position fields of the force vector properties.

More on referencing functions:
Using Tools > Using Field Functions > Field Function Programming Reference > Referencing Field Functions

More on getting current time (for your custom field function):
http://www.cfd-online.com/Forums/sta...tion-step.html


All times are GMT -4. The time now is 16:47.