One way that we made steam effects is through the use of a pnumatics mixed with a fog machine. Basically we had a fog chamber where the fog machine pumped into. We had pvc pipe that lead from the box of fog and had drilled holes through and through the pipe where we wanted steam to appear. One was only large enough to fix an air nozzle to, the other was slightly larger, where the fog would exit. Basically when we fired the air it created a vaccume in the pvc which syphoned the fog out of the chamber and out of the hole in a whispy way.
You could use this at a simpler scale as well by using ducting and hoses. The trick IMO would not have a fan directly syphoning on the supply of fog but allow it to naturally make its way to the fan as it blows. I think the principle being used is air moving from a low pressure to a high pressured area. Highpressure being the air being blown by the fan.
You could use this at a simpler scale as well by using ducting and hoses. The trick IMO would not have a fan directly syphoning on the supply of fog but allow it to naturally make its way to the fan as it blows. I think the principle being used is air moving from a low pressure to a high pressured area. Highpressure being the air being blown by the fan.