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Extracting a control volume around an airfoil.

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Old   December 2, 2013, 18:27
Question Extracting a control volume around an airfoil.
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I have simulated a 2D airfoil and I want to determine the drag by the momentum of the fluid. So I want to create a rectangular control volume (CV) around the airfoil to integrate the flow variables over it. For the integration I want to use Matlab, therefore I need to extract the flow variables in the blue CV (s. attached screenshot), but is this possible?
To extract the points on a line I can use Data->Extract->Points from polyline, but how can I extract the points of this CV?
Your help would be appreciated!

Best Regards!
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