This daemon is useful for simulating the well-known rotational motion of liquids when they disappear in a plug hole or similar effects.
Affect
With “Force” it takes a little time to display the daemon's full influence and the result is a curved stream of particles. “Velocity” directly affects the particles from the very beginning without any delay or acceleration, and you will get a linear particle stream. “Velocity” is not available for rigid/soft bodies.
Strength
This is the strength of the rotational force around the daemon’s centre axis. Strength” accepts positive (clockwise) and negative (counter-clockwise) values.