Emitter : Emission Linear
"Linear" is a two-dimensional emitter in the shape of a straight line. Emitters define the point of particle creation in 3D space, while the particles are part of the "Fluid" container. Emitters can be scaled, rotated, and translated like objects; an arrow indicates the direction of emission.
Height
This creates a rectangular, curtain-like array filled with particles.
Speed
Here the particles' initial speed is defined in metres per second. Higher values will generate more particles per frame. The number of emitted particles also depends on the fluid's “Resolution” settings. A value of 0.0 stops the emission of particles.
Vertical Random
To avoid regular emission, it is possible to randomly displace the particles with these functions. The parameter accepts any positive value and 0.
Horizontal Random
To avoid regular emission, it is possible to randomly displace the particles with these functions. The parameter accepts any positive value and 0.