[Sam1990]

Hello,
I'm trying to calculate lift and drag on blade that moves in Spiral motion (attached figure),Dotted line shows that that blade has to come back to initial position and start motion again. what I've read so far(although I'm not sure) is that i need to use UDF CG motion to force blade wall to follow spiral trajectory. Is that right approach? Or should i use "moving wall boundary condition" on blade wall and define "profile macros" for x and y component.

OR
Is there any other approach i should use?

Any suggestion is welcome and appreciated
Thank.

Vic.

[Sam1990]

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