grid force
In order for this node to work, there must be a FumeFX simulation ref node or initialize grid node present in the editor. This node reads the velocity from the grid so make sure that you have the velocity channel present.
[Inputs]
#Particle Stream - This pin requires a particle stream to be connected. Connection is usually not required if any of the attributes is connected.
Enabled - Enable or disable node evaluation.
Grid - Choose one of the available grids.
Force Scale - Scales the force.