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Forces in local Body axis system.

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Old   June 29, 2020, 10:24
Default Forces in local Body axis system.
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Dear FOAMers;


How can I extract the aerodynamic forces and moments in body axis frame for a rotating grid? In my simulation I noticed that the forces are oscillating because the main global axis does not rotate with the grid.


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Old   July 1, 2020, 07:44
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I have achieved this transformation by using quaternions and rodriguez rotation. But this is probably not the best way to do it. Any ideas on how to create a local cordinate system that rotates with the grid?
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