global X direction
How is the 'global X direction' defined in CFX-pre? Does that mean the x direction anywhere in all domain, or just at [0, 0 , 0]?
I am struggling with this concept when defining the rotation of two impellers in one domain. For one impeller which pass [0,0,0], the rotation direction was always right. Another one was not.
Thanks for your advice in advance!
Re: global X direction
Just read the help files. I should use a local coordinate.
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