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unsteady external force

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Old   August 13, 2010, 13:39
Default unsteady external force
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Tim
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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?
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Old   August 16, 2010, 16:38
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f-w
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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):
Java code to get the current time/iteration step
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