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!

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

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.

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

How can I calculate the areodynamic torque?

Hi,

Using the CEL functions torque_x, torque_y and torque_z.

Glenn Horrocks

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!

Hi,

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

Glenn Horrocks

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!

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