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Robin's gif
>If the drain radius is chosen smaller than the hole radius,then no
water flows,and there is no vortex. If the drain radius is chosen larger then
the hole radius, then water leaving at the larger radius has less kinetic
energy,
What am I missing?
Flow is required to produce the vortex.. the vortex dynamic changes
to correct for smaller radius drain hole but flow does not cease.
The shape of the tank, i.e. round, square, cone, produces different
configurations of vortex. Some of which are diagonal at times but in constant
flux due to counter rotational forces.
As my old prof once said.. one can perform wonders with numbers while
eating cucumbers.
Richard
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