Fan
Applies a cone-shaped force to particles.
The further away from the fan the particles are, the less they are affected by the force. For example, you can instance bubbles or fish on particles, bind a fan to the front of a submarine, and move it through the particles.
Using Fan
Click the
Fan button on the Drive Particles tab.Click
the 
particle system you want to be affected and press Enter to confirm your selection.Specify the node settings in the operation controls toolbar or parameter editor.
For specific parameter help see the Fan node help.