Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: Dudley on 30/09/2011 13:01:13

Title: Why does water going down a plughole create a vortex?
Post by: Dudley on 30/09/2011 13:01:13
Dudley asked the Naked Scientists:
   
Why does water going down a plughole create a vortex? And does it go in the other direction in the southern hemisphere?

What do you think?
Title: Why does water going down a plughole create a vortex?
Post by: yor_on on 02/10/2011 11:50:43
Well, I would guess it's a effect created by the direction, pressure, etc of the water tap, combined with the shape of the container in which it drains. And if it so it should be possible to construct a container where there is no discernible vortex. And the Coriolis effect surely exist but have its greatest importance at large weather systems, not tornadoes, and ballistic missiles. For so small things as your bathtub it should be very difficult to see.