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Circumferential calculation using vector transformation.

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    • March 17, 2023 at 8:57 am
      FAQFAQ
      Participant

      Circumferential velocity is the vector transformation of U and V. So the equation is : V circum = Velocity u*sin(Theta)-Velocity v*cos(Theta) Theta would be the angle between the (x,y) point at which the velocity is calculated (ie. Theta=atan(x/y)). It is different for every mesh point. CFX has a field variable for “Theta” which can be used in the CEL expression. The equation need to be modified (like reverse the sin and cos or change the negative sign to positive) depending on where Theta is referenced to. Here is a reference: https://en.wikipedia.org/wiki/Rotation_matrix

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