Vortex Rings, Salps, and Underwater Robots

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Learn how a marine invertebrate's propulsion can help engineers build better underwater robots.
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Further resources:
Vortex ring interactions - A. Athanassiadis and D. Hart, 2016: dx.doi.org/10.1103/PhysRevFlui...
Vortex ring playlist: • SM Thesis - Parallel P...
Salp propulsion - K. Sutherland and L. Madin, 2010: jeb.biologists.org/content/213...
Salp Footage:
Alvaro Migotto, "A salp symbiont copepod - Copépode simbionte de uma salpa", • A salp symbiont copepo... (Creative Commons - Attribution Only)
David Altherr, "La Jolla Shores - 2014 05 03", vimeo.com/93800624 (Creative Commons - Attribution Only)
Kelly Sutherland, "Comparative jet wake structure and swimming performance of salps", J. Exp. Biol. 2010; used with permission
Music:
Aitech by Kevin MacLeod is licensed under a Creative Commons Attribution license (creativecommons.org/licenses/...)
Source: incompetech.com/music/royalty-...
Artist: incompetech.com/
Special Thanks To
Athanasios Athanassiadis
Justin Brown
Kelly Sutherland
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FYFD video is written and hosted by Nicole Sharp, Ph.D.

Опубликовано:

21 июл 2016

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Комментарии : 31

@prgalois 8 лет назад

Haha that handshake at the end. Great experiment and explanations guys!

@swaitukaitis1 8 лет назад

This is the coolest thing I've ever seen. Except for the bearded Greek dude--he's even cooler. Ice cold.

@elliottmcollins 8 лет назад

Neat!! I'm excited about anything that includes underwater robot swarms.

@douglasbarnes4035 8 лет назад

I for one welcome our underwater robot swarm overlords.

@andrewburnett6222 8 лет назад

This video is great quality

@Windcent 5 месяцев назад

I like how they have to cut the phd student speech so that the video can fit under an hour.

@stepharcos 8 лет назад

Nice vidéo !

@itskelvinn 8 лет назад

Great content

@Pottery4Life 8 лет назад

Great video. Thanks.

@dersaureapfel 8 лет назад

today i was in the forest and saw a little water pond not so big. it was red and i threw something in, then i saw the vortecies and i thougt: yes finaly i found a place to see the vortecies good. and i played the whole time with the water and people came and watched me and i said hello and they didnt insult me :)

@theelectricwalrus 8 лет назад

awesome!

@nabekary 5 лет назад

loved it

@rogerscottcathey 4 года назад

Wonder what an underwater speaker will do with a venturi tube wave guide. Blu-tooth various tones into it to see various rates of movement.

@apurbabiswas7218 8 лет назад

Very cool.

@leahcooper5831 2 года назад

What does it look like when the thrusters alternate instead of pulsing at the same time??

@Jack-ne8vm 7 лет назад

If fluid is pumped through a spiral tube, are there gyroscopic effects you could use?

@TriumVee 7 лет назад

if you create a vortex ring and capture it will it move the container its in?

@codetech5598 3 года назад

What do you think about the work of Viktor Schauberger?

@beachboardfan9544 8 лет назад

Sooo could salps form a human centipede like chain and produce an augmented water jet?

@rmspinoza141 2 года назад

♥️♥️♥️

@davidbee2300 8 лет назад

fun stuff. I fucking love science!

@joemonster55 8 лет назад

If the vorticies have progressed sufficiently far from the nozzle, does it really matter if they interact? The propulsive force on the vehicle is just the sum of pressures and shears across all surfaces, so how would an interaction away from the vehicle have any effect? Thanks in advance for clearing this up for me!

@isanaht 8 лет назад

great observation. the propulsive force is affected by vortex interactions only when the vortex rings are still near the nozzle (i.e. when the interactions can still affect the nozzle overpressure). That effect drops off quickly as the rings move away. Because of this, the forces measured in the paper were only measured while the rings were still forming (green fluorescent videos, close to the nozzle). Although there is little visible mixing in those videos, the developing vortex rings still have a strong effect on each other, because the pressure fields they generate travel at the speed of sound (much faster than the videos). The backlit experiments don't directly reveal the nozzle forces, but they demonstrate rich vortex dynamics. In this case, they also provide the correct intuition about how interactions affect momentum transfer (stronger interaction leads to slower rings and less thrust).

@joemonster55 8 лет назад

Wow, thanks for the thoughtful response! I enjoyed the florescent demonstration a lot.

@RandomFace0815 8 лет назад

What effect do the vortexes have in air? With bigger propulsion? I mean their impact on rocket efficiency ;)

@oscaralvarez714 3 года назад

The effect should be very similar

@user-om3tz1hi7k 7 лет назад

с большей площади на меньшую тогда вихрь более плотный и быстрый

@Adrischa 8 лет назад

very interesting an nice video sometimes it sounded a bit overly scripted and unnatural (endscene)

@ArtanisOwns 8 лет назад

that girls shirt is great

@noelalexisshaw-nas-noz5142 2 года назад

Haha Xcuse My Puns...The "Cheese" In This "Mare(E)Bobbins" Is Bay Yond 🤣🤣🤣🤣🤔🧐⚡....Hmmmm, Water Experiments....Lets "Go Upstairs" ...Argo To Our Skies - And Her Waves Of Frequencies - Lite'El Nans O Bots Pulsating Our Layers Of Bands, 7 Br'Os Fore 7 Wh'O's - Zonez. Yeah Damⁿ Strait I Downloaded This, Just Like I Download Knoll-Hedge Of Tines....Dei₩reX From S'auce, You Just Demonstrated The Winds In The Willows. 🌽 E Butt Knowledge Gleaned, Thanks 4 The Shær, Much Love, Noel(AS) 🌱