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A centrifugal body force per mass $\mathbf{b}=\omega^{2}r\mathbf{e}_{r}$ may be used for bodies undergoing steady-state rotation with angular speed $\omega$ about a rotation axis directed along $\mathbf{n}$ and passing through the rotation center $\mathbf{c}$ . Here, $r$ represents the distance of each material point from the axis of rotation, and $\mathbf{e}_{r}$ is the radial unit vector from the axis of rotation, both of which are calculated internally from the knowledge of $\mathbf{n}$ and $\mathbf{c}$ .

<body_load type="centrifugal">
  <angular_speed>1.0</angular_speed>
  <rotation_axis>0.707,0.707,0</rotation_axis>
  <rotation_center>0,0,0</rotation_center>
</body_load>