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For Revolutions per time, enter an RPM value.
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Select Define spatial frame rotation to add also the rotation to the definition of the spatial frame. For other physics interfaces, this is similar to specifying a Rotating Domain, but with the displacements added. This approach must be used if there are a mix of stationary and rotating domains.
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When Define spatial frame rotation is selected, the actual angle of rotation becomes important. If the angular speed is non-constant, you must then enter an expression for the angle as function of time explicitly using the User defined option. For the two other input options, the angle of rotation is assumed to be α0 + Ωt.
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Only features which have a geometrical selection contribute to the mass forces. The Mass and Moment of Inertia nodes are global features and will not get any contribution from Rotating Frame.
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