This daemon is used to simulate noisy wind. Like many other daemons, wind forces can be bounded to limit them. An arrow indicates wind direction.
...
RealFlow Scene
In RealFlow | Cinema 4D it is possible to use multiple "Scene" trees in the same project. To link a daemon to a different scene tree drag the appropriate "Scene" node to this field.
Linked Fluids
All fluid containers inside the drag-and-drop field will be affected by the daemon. The first fluid container in the scene is linked automatically, others have to be attached manually.
...
“Yes” creates a conical shape – its dimensions are displayed in the viewport. The gizmo's size is adjusted with “Radius 1| 2” and “Height”. You can use the parameters from the “Objects” tab or Cinema 4D's scale tools for resizing the daemon.
Radius 1
This is the radius of the bounding cone at the daemon's pivot point.
...