I have a small tornado project. I have already modelled a shape, which can be tweaked easily..
I have vortex, drag and newton field to control motion of particles.. The problem is that the particles don't stay on the shape and expands due to the fields I have..
Are there any expressions that I can use to controll the particles so that they can stay on the shape then just circle around the shape?(In this case, may not need the fields)