The nucleus solver is tool that can handle pouring liquids results. To these example I tried to recreate a rain system, with some tweaks and tests I found easy way to attract the particles to some object.

A plane has been setup to emit particles, with a simple “Particle Collision Event Editor” the particles will die when they collide with the sphere “lifespanPP =0″, that event will emitte 1 particle system without any spread and speed setup to 0.3. That second particle will create another event witch will split 60 particles width spread set to 0 and speed set to 1….remember in the collision properties setup the stickiness to zero..

Real water would tend to adhere to the objects a bit and the droplets must follow the first one and roll down. To accomplish this  I used the “Force Field” attribute on the sphere to create an attractive force for particles. On the nRigid shape for the sphere I have set the following:

Force Field = Single Sided
Field Magnitude = -4.0
Field Distance = 0.13