Fluid Dynamics 101 - can someone explain this ??

[Alan W]

...kind like a tip vortex, but then they break away one ring and form another ?!?!? SPECTACULAR !!!

http://www.youtube.com/watch?v=TMCf7SNUb-Q

[JetPlaneFlyer]

Amazing... I'd assume it's caused by a rolling taurus (a.k.a. doe-nut) shaped vortex. The rotation of the vortex draws the light (relative to water) bubbles into it's centre.. Quite how the dolphins break off part of the taurus and create a new smaller one I have no idea... put it down to magic!

[Wendi Smol]

Fascinating, but basically the same principle as blowing smoke rings.

W.

[HX3D014]

Very smart dolphin :)

Notice how the dolphin places its head near the ring. it is the same for each one. What is happening is he is just interfering with what you can not see. the whole energy movement through, in front behind and around the visible air trapped in the Toroidal vortex.

(I think toroidal (http://en.wikipedia.org/wiki/Toroidal) torus (http://en.wikipedia.org/wiki/Torus) is<Has to do with or is originated from> a bulls nose ring Look at the names of these Bullrings (http://en.wikipedia.org/wiki/Bullring). but the Doughnut is what is commonly known to the modern world ;))

fluid is moving forward through the ring and then actually it is rotating around the outside of the ring. how it starts in this case seems to be generated from the dolphins Spout, I did not know and do not know if; the dolphin can spurt water out of its spout. Strange I say spout. I am feeling lazy and the kid is nagging me right now, So I did not do any quick search as to what a Breathing hole in the upper skull? of the dolphin is properly labelled. but it seems he is energising it with the spouted water.

How can he seem to move it around. well using the spout could be one way. but another could be by causing interference on one side that causes that side to slow down a little causing a kind of turn.

Did you notice what happened to the remainder of the ring after it interfered with it to create or manipulate a Smaller one off it. it dispersed its energy bluntly into the water.

More questions ?
Bryce Ring.

[Shedofdread]

Is it a form of soliton wave (http://en.wikipedia.org/wiki/Soliton)?

You can make a device to make these in air by taking a plant pot, cutting a hole in the bottom and covering the top with a stretchy medium (latex glove etc.). Point the hole at a colleague, stretch the glove and release. The wave can be felt strongly some distance away.

Have fun at work tommorow!

S

[bwalt822]

heres what happens when two of these rings collide. Really cool

http://www.youtube.com/watch?v=XJk8ijAUCiI&feature=PlayList&p=B504910E21642265&playnext=1&playnext_from=PL&index=2

[podavis]

heres what happens when two of these rings collide. Really cool


Awesome! It looks like a vectorial summation of the fluid motion where they colllide causes the disc, but the little evenly spaced toroids aligned with the outer ring of the disc? What the heck!

[bwalt822]

Well if you watch closely it looks like the rings may not merge and cancel eachother out but when they hit they push themselves outwards. If you look closely, right before the rings form you still see the rings parallel to eachother but it seems like some areas split and some blend together. Then for whatever reason the ends of the split areas join up to form the small rings.

Im not sure what causes the rippleing in the center disk, but the ripple are tied to the small ring formation.

[kcaldwel]

I suppose the rotational momentum has to be conserved?

It is a beautiful and complicated phenomena. Thanks for the links.

Kevin

[bwalt822]

I suppose the rotational momentum has to be conserved?

It is a beautiful and complicated phenomena. Thanks for the links.

Kevin

except for viscous effects