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The interesting series of posts regarding this subject is fascinating.
Anyone sitting in the middle of a tornado or hurricane can testify that the
forces generated are awesome and certainly didn't come from the effect of
gravity of falling water. A water vortex performs an interesting " reverse" flow
similar to a hurricane. The evidence of this reverse flowing condition is from
the micro
"twisters" spun off from the main vortex. The twisters are described as
microbursts by the weathermen and account for the strange and specific damage
during a hurricane. The twisters produce a short duration whistling sound
easily remembered by anyone that has spent hours located in the path of a
hurricane as it passes.
We can produce many variations of a vortex in our glass test tanks, The
short duration vortexes spun off from the center vortex can be vertical,
horizontal or diagonal and visible in the water tank because of entrained air.
As for the mathematics of a vortex, my old professor used to state.. one
can perform wonders with numbers while eating cucumbers.
Richard
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