# UDF for a sinusoidal rotation of an airfoil

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 October 6, 2008, 05:25 UDF for a sinusoidal rotation of an airfoil #1 Lorenzo Guest   Posts: n/a Hello!! I have to simulate a periodic rotation of an airfoil around the z-axis ( my problem is 2d) and calculate the instationary coefficient. The rotation is defined by a torsional time dipendent law: alpha(t)= alpha0 + alpha^(jwt) How can I do to define a UDF that simulate the rotating wall?? I have tried to use an UDF but with no good results.... Hoping that someone could help me...is for my thesis!!! Thank you in advance

 October 8, 2008, 09:24 Re: UDF for a sinusoidal rotation of an airfoil #2 DANG Huixue Guest   Posts: n/a You can refer to a UDF manual, such as you can define a DEFINE_REGID_MOTION, etc. The UDF program in that manual is very helpful.

 October 10, 2008, 10:37 Re: UDF for a sinusoidal rotation of an airfoil #3 Lorenzo Guest   Posts: n/a I can't find a function called define_rigid_motion..I know about a function called DEFINE_CG_MOTION..someone can help me with this one?? Thank you

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