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Mesh motion - Rolational velocity components

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Old   January 30, 2006, 05:09
Default Mesh motion - Rolational velocity components
  #1
Manoj Kumar
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Hi

Do we have the option of imposing rolational velocity components to a deforming mesh? I can find just x,y and z components in 'Edit Boundary>Mesh Motion' panel.

Thanks

Manoj
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Old   January 30, 2006, 18:00
Default Re: Mesh motion - Rolational velocity components
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Glenn Horrocks
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Hi,

With deforming mesh you have to specify the incremental deformation or the absolute location of every node. You need to write a function which describes the motion of every node as a x/y/z deformation or position.

Glenn Horrocks
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Old   January 31, 2006, 00:25
Default Re: Mesh motion - Rolational velocity components
  #3
Manoj Kumar
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Hi Glenn

In my problem a block floats in water contained in a tank. Due to sloshing force the block translates and rotates. I was earlier using Fluent, and was able to simulate this problem using 6DOF feature.

How do I solve this problem in CFX-10 ? Will I have to write a CEL function or a fortran routine to specify the rotational (with translational) motion ? Can you guide me..

Thanks

Manoj
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Old   January 31, 2006, 18:34
Default Re: Mesh motion - Rolational velocity components
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Glenn Horrocks
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Hi,

You will need to generate equations of motion for the nodes on the surface which give the new node positions as a function of the original node position and the block translation and rotation.

Have a look at the mesh deformation example with CFX.

It also sounds like you are new to moving mesh in CFX, so start off by doing simpler things like a piston compressing a cylinder with moving mesh. When you can run that confidently start thinking about your more complicated 6DOF case.

Regards, Glenn Horrocks
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