Learning Forum

[Onur Simsek]

Hello, I'm a student and trying to test vertical wind turbines. During cfx test, in setup and solution tab everything is fine but in results, software is slightly sliding my turbine from the center and I don't know how to fix it.

If someone can help me I appreciate it.

[Onur Simsek]

In the setup screen, as you can see from the image everything is fine.

[Rob]

Check the centre of rotation in CFX and compare with your geometry. At a guess the axis is not where you thought it was. 

[Onur Simsek]

I still couldn't figure it out. Yes, probably it's because mismatch of the centers. However, the second image which I sent here shows that they match. And can you maybe be a little bit more specific how to check, please?

[Rob]

Set up will show the initial condition, which is from the CAD. In results it'll be wherever the spinning part finished up. In geometry find the centre of the turbine unit (you may need to slice/chop the model to create a vertex). I'm not sure how rotation is set in CFX, but it'll be defined in the fluid zone somewhere - that need to be the same as CAD value.