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Areodynamic torque of butterfly valve

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Old   September 30, 2008, 12:52
Default Areodynamic torque of butterfly valve
  #1
J.Szary
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Hi,

I'd like to calculate areodynamic torque of my butterfly valve. I've got only 3 datas: dimension of valve, pressure (1/3 atm) and i know that the air is releasing to the atmosphere. Can anyone help me and describe step by step what should I do? (starting with CFX-Pre)

Regards!
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Old   September 30, 2008, 19:07
Default Re: Areodynamic torque of butterfly valve
  #2
Glenn Horrocks
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Hi,

Step 1 - Do the tutorials in CFX. There is even a flow in a butterfly tutorial problem so you might find that one particularly useful. Step 2 - Do the analysis based on what you learned in the tutorials. Step 3 - When you have more specific questions/comments about the simulation then raise a topic on the forum.

Glenn Horrocks
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Old   October 1, 2008, 09:53
Default Re: Areodynamic torque of butterfly valve
  #3
J.Szary
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I've done a static simulation, but I'd like to simulate rotating disc. How can I initiate it? There is no option for cylindrical coords. I've red your post about making mesh diaplacement transformation, but I'dont know how exacly do it.
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Old   October 2, 2008, 18:14
Default Re: Areodynamic torque of butterfly valve
  #4
Glenn Horrocks
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Hi,

You want to move the butterfly in a transient simulation? You are the third person I have recommended to try the mesh deformation tutorial from the CFX-Tutorial Manual this morning.

Glenn Horrocks
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Old   October 9, 2008, 16:50
Default Re: Areodynamic torque of butterfly valve
  #5
J.Szary
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How can I calculate the areodynamic torque?
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Old   October 9, 2008, 18:52
Default Re: Areodynamic torque of butterfly valve
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Glenn Horrocks
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Hi,

Using the CEL functions torque_x, torque_y and torque_z.

Glenn Horrocks
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Old   October 10, 2008, 12:05
Default Re: Areodynamic torque of butterfly valve
  #7
J.Szary
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Thanks a lot for your patience. I'd like to simulate a rotating valve (normally and rapidly rotated) and investigate a torque for this condisions . I tried mesh deformation, but the negative elemets has appeared. Maybe there is a better solutions for this problem?

Regards!
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Old   October 12, 2008, 17:54
Default Re: Areodynamic torque of butterfly valve
  #8
Glenn Horrocks
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Hi,

Put the valve is a rotating frame of reference and connect to the rest of the domain with a GGI.

Glenn Horrocks
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Old   October 12, 2008, 19:01
Default Re: Areodynamic torque of butterfly valve
  #9
J.Szary
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There is a problem. I can't put solid valve in rotating frame (there is only stationary option). And how can I apply BS on my symmetry when I've already interface condision on it.

Regards!
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Old   October 13, 2008, 17:51
Default Re: Areodynamic torque of butterfly valve
  #10
Glenn Horrocks
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Hi,

Are you trying to do a CHT simulation with moving mesh or RFR? Why do you need the do CHT (conjugate heat transfer)? I am not sure if this combination is supported - better talk to the support office.

Glenn Horrocks
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