Northwestern Physics Demos                                 Go back to FLUIDS
DCS# 2C50.11NWU# F-19 Location:    Back corner near 4
title: Smoke Ring Vortex

   Several devices are available to produce vortex rings filled with smoke.  The small plastic models have their own smoke sources included and can blow out a candle when close up.
   The next larger size, the black can, has considerably greater range, but needs the smoke generator, as does the trash can version.  

    Can SQUARE rings be made?
     What does the speed depend on?
A dolphin playing with bubble rings can be found on YouTube at:

as of 3/2009
pix of set upsmall shootersbiggerbigger!smoke gen