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Moving mesh for the rotors of wave energy conversion device

    • UTRGVMTL
      Subscriber

      The wave energy convertor rotor moves in still water. The rotor rotates around its shaft while the rotating shaft makes a circular motion. Like the earth's movement around the sun, the earth is orbital revolving and rotating. In this case, the rotor's revolution is active motion, using DEFINE_CG_MOTION, and the rotor's rotation is passive motion, using DEFINE_SDOF_PROPERTIES. However,  the rotor can only add one UDF in a time as a rigid body in Dynamic Mesh Zones. Therefore, how can  I achieve the rotation of the rotor around the shaft while the rotor's shaft is moving?

    • Rob
      Ansys Employee

      If both parts freely rotate then you can do this with sliding mesh. Set the inner zone to rotate relative to the outer moving zone. The only UDF you may need is one to calculate the forces on the blade & structure to work out the rotation speed.

    • Keyur Kanade
      Ansys Employee

      This may help. 



      If the suggestions provided, solves your issue, please mark this as 'Is Solution' to help others on forum. 


      If you have any specific questions, you can add more images with some description with arrows. Please note that as ANSYS employee, we can not download any attachments. 


       

    • UTRGVMTL
      Subscriber

      Thanks for your help. The rotation of rotor is due to push of water on the rotor. There is a little different between my case and this vedio.

    • UTRGVMTL
      Subscriber

      Thank you!


      This picture shows the rotor ,which consists of three blades, is rotating in channel (2D). The motion of rotor is using DEFINE_SDOF_PROPERTIES.


      I want to monitor the parameters on the each blade of rotor. However,the surface name is "rotor", I can't monitor each blade. If I name each blade like "blade1","blade2","blade3", the releative position of each blade will be changed. Therefore, what should I do to monitor the each blade.


       



       

    • Antoni
      Subscriber

      hi UTRGVMTL


      I desperately need the answer of your questions.


      Dear Ansys Team! please provide us an answer.

    • Rob
      Ansys Employee

      Why can't you use the approach in the video? Moving/deforming mesh will work, but the embedded sliding mesh is computationally more efficient. 

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