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Scuba Forum / General / February 2008Dolphins and bubble rings
Check this out if you haven't seen it already. It's very cool. http://www.flixxy.com/dolphin-quest.htm Once on the site, click on the arrow to start the video. hierophantfish@hotmail.com pounded away at his keyboard resulting in: :Check this out if you haven't seen it already. It's very cool. : :http://www.flixxy.com/dolphin-quest.htm : :Once on the site, click on the arrow to start the video. I don't see how the rings stay vertical and don't rise. Something doesn't make sense here. Dan Bracuk Never use a big word when a diminutive one will do. > hierophantfish@hotmail.com pounded away at his keyboard resulting in: > [quoted text clipped - 6 lines] > I don't see how the rings stay vertical and don't rise. Something > doesn't make sense here. You will notice that the dolphin seems to pursue the bubble at quite a fixed distance and position. What you don't see on the video is that he squirt water out of his nostril to direct the bubble. The math behind is a quite complex one. The bubble ring is a torus shaped vortex, and any liquid matter blownthrough its center will stabilize it. A more technical example is the steering of supersonic torpedos, which "swim" into the "vacuum" created by their own forward cavitational bubble. Matthias > > hierophantf...@hotmail.com pounded away at his keyboard resulting in: > [quoted text clipped - 20 lines] > > Matthias supercavitating not supersonic Janusz >>>I don't see how the rings stay vertical and don't rise. Something >>>doesn't make sense here. [quoted text clipped - 14 lines] > > supercavitating not supersonic Right. Matthias > janus...@hotmail.com wrote: > >>>I don't see how the rings stay vertical and don't rise. Something [quoted text clipped - 19 lines] > > Matthias BTW Is Barracuda still in R&D? Janusz >>janus...@hotmail.com wrote: >> [quoted text clipped - 22 lines] > > BTW Is Barracuda still in R&D? You cannot see it, because they test it in a covered canal. 50 km from here. Matthias Matthias |
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