Quote Originally Posted by mike_biddell View Post
A mobile phone vibrator might allow the resin to overcome surface tension. Turned ON when the laser is OFF. The ripples wud die down quite rapidly in a viscous fluid.
Quote Originally Posted by Feign View Post
I was also thinking something similar, though less a vibrating motor and more a subwoofer speaker (because I have a few just sitting around in the basement) against the side or bottom of the tank to put a low-frequency noise into the fluid between layers. With a speaker playing a tone, you can get nice fine adjustment of the output to find just the right tone for your tank. (oh yeah, that's right, more things to calibrate! )
I'm not too well up on fluid dynamics, but I would imagine that to get decent coverage this way a fairly substantial disturbance would be required. Since the waves will lose energy with increasing distance from the source the amplitude would also be different depending on depth. Right?