Define Rotational Motion
Use Rotation tool to define mesh rotation on solid bodies or surfaces.
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From the Motion ribbon, click the Rotation tool.
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Select surfaces and/or solids.
Use the guide bar selectors to filter which entity type you can select.
- Click Axis on the guide bar.
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Left-click to position the axis of rotation in the modeling window.
Tip: Use snap points to position the axis on existing points, lines, surface centers, and so on.
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Use the options in the microdialog to further align the
axis.
- Click to flip the rotation direction.
- Click X, Y, or Z to align to the global axes.
- Click to position the axis using the Vector tool. Once the position is defined, press Esc to return to the current tool.
- Click to enter axis and rotation center coordinates.
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In the microdialog, select a motion definition type
then define the motion.
Option Description Constant Define a constant velocity. Time Varying - Click .
- In the dialog, define a basis for motion variation, a motion input, and a data interpolation type.
- Use the table and the plot area to create a data set.
- Exit the dialog.
Sinusoidal - Click .
- In the dialog, define a motion input.
- Enter values for frequency, phase, and amplitude.
- Exit the dialog.
Hybrid This option allows you to start with an MRF and then enable mesh motion after a certain amount of time steps. Before defining hybrid motion here, you should:- In the Flow ribbon, Physics tool, set time marching to Transient and define a time step size
- In the Motion ribbon, Settings tool, set the mesh motion type to Specified or Arbitrary.
Now, returning to the Rotation tool:- Click .
- In the dialog, define the required speed (radian/sec).
- Select time/time step as the specification method and add
rows to define the MRF fraction at each time step.
An MRF fraction of 1 means rotation is simulated completely by the MRF. An MRF fraction of 0.4 means: 40% MRF and 60% Mesh motion. A 0 MRF fraction means rotation is simulated by sliding mesh motion.
- Click to automatically populate suitable time increments based on the MRF fraction.
- Exit the dialog.
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From the guide bar, execute the command in the following
ways:
- Click to confirm your selection and remain in the
tool.
This allows you to continue creating instances and helps you visualize and edit instances with the legend.
- Click to confirm your selection and exit the tool.
- Click to confirm your selection and remain in the
tool.