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Nicole SharpInside Cuttlefish Suction
Cuttlefish, like many cephalopods, catch prey with their tentacles. Suction cups along the tentacle help them hold on. In this video, researchers share preliminary studies of what goes on inside these suction cups as they’re detached. The low pressures inside the suction cup cause water to vaporize, temporarily. As seen for both the cuttlefish and a bio-inspired suction cup, small bubbles form inside the attached cup, coalesce into larger bubbles, and then get destroyed in the catastrophic leak that occurs once part of the suction cup detaches. (Video and image credit: B. Zhang et al.)
#biology #bubbleCollapse #cavitation #cuttlefish #flowVisualization #fluidDynamics #physics #science #suction
Flamingo Fluid Dynamics, Part 1: A Head in the Game
Flamingos are unequivocally odd-looking birds with their long skinny legs, sinuous necks, and bent L-shaped beaks. They are filter-feeders, but a new study shows that they are far from passive wanderers looking for easy prey in shallow waters. Instead, flamingos are active hunters, using fluid dynamics to draw out and trap the quick-moving invertebrates they feed on. In today’s post, I’ll focus on how flamingos use their heads and beaks; next time, we’ll take a look at what they do with their feet.
Feeding flamingos often bob their heads out of the water. This, it turns out, is not indecision, but a strategy. Lifting its flat upper forebeak from near the bottom of a pool creates suction. That suction creates a tornado-like vortex that helps draw food particles and prey from the muddy sediment.
When feeding, flamingos will also open and close their mandibles about 12 times a second in a behavior known as chattering. This movement, as seen in the video above, creates a flow that draws particles — and even active swimmers! — toward its beak at about seven centimeters a second.
Staying near the surface won’t keep prey safe from flamingos, either. In slow-flowing water, the birds will set the upper surface of their forebeak on the water, tip pointed downstream. This seems counterintuitive, until you see flow visualization around the bird’s head, as above. Von Karman vortices stream off the flamingo’s head, which creates a slow-moving recirculation zone right by the tip of the bird’s beak. Brine shrimp eggs get caught in these zones, delivering themselves right to the flamingo’s mouth.
Clearly, the flamingo is a pretty sophisticated hunter! It’s actively drawing out and trapping prey with clever fluid dynamics. Tomorrow we’ll take a look at some of its other tricks. (Image credit: top – G. Cessati, others – V. Ortega-Jimenez et al.; research credit: V. Ortega-Jimenez et al.; submitted by Soh KY)
#biology #filterFeeding #flamingo #flowVisualization #fluidDynamics #physics #science #suction #vortices
Rose toys are a hit because they combine suction technology that mimics oral stimulation with multiple intensity levels. 🌹 Their discreet design makes them perfect for anyone looking to enhance their intimate experience—whether you're a newbie or an expert! Curious about why everyone is raving about them? 👉 Read more here
#RoseToys #Pleasure #Intimacy #VibratorReview #Suction #OralPleasure #WomenPleasure #SelfCare #A
https://vibetechnow.com/2024/10/02/rose-toys-for-women-vibrators-review/
ToroidalCoreSo, backing up a little bit. Overall, I like having a pool. My family had an above-ground one growing up (my parents still have one) and I'm kind of used to maintaining one and even like messing with the plumbing a little (flimsy plastic vent valves aside). My house came with an in-ground pool, which I likely wouldn't have had installed had it not come with one, but which I'm glad I have nonetheless for when we get our heat waves.
Another thing that kind of annoys me about it, though, is the inlet plumbing. It's common for in-ground pools to have a main drain aka floor suction port, and in this case it's plumbed up through the skimmer. There's a plastic fitting that covers the two holes, and has a hole on its own top, so you can adjust how much flow comes in through the skimmer verses the drain. These skimmers are set up so you have the option of plumbing it this way, just using one of the holes, or to use the second hole to go to another inlet just below the water line to still allow water to flow in if the level is just below the skimmer line.
Typically, you'd run another suction line back from the drain to a valve at the pump. I would sort of prefer this, as 1) I could just adjust it from the garage, and 2) as it is there's a single pipe going to the skimmer, with the drain in series, and a parallel connection should allow for more flow.
Of course, this also brings up the issue of suction entrapment, which is kind of scary - I'll throw in another CW here and warn you that if you look this up, it can be gruesome if precautions aren't made. In newer pools, you usually have two drains some distance apart, connected by a T. So if one gets covered, in theory it doesn't build up enough pressure to hold someone there. There's also a vacuum break you can get, which opens when there's enough of a pressure differential (if something blocks the drain while the pump is on) and lets air in. I think you can also install an air vent which is basically just another T in the suction line, underground at the level of the drain, and the the pressure of the pool water keeps the whole thing flooded unless something blocks it.
In my case, I'm not sure how much of a solution that plastic fitting that goes in the skimmer is to the entrapment thing. I tend to set it up so that it doesn't restrict the flow much to the skimmer or drain, on the idea that the drain shouldn't build too much pressure that way. I guess I could just remove it, leaving the two openings unrestricted (there's a basket that goes over them), but the fitting does force a bit of flow from the drain which is helpful, as long as it's not dangerous.
Kara Finance
drawnout18Part two of a commission for KazJester. All the researchers seem to have latched onto something whilst the artifact continues it's never ending inhaling session. Who will lose grip first???
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Part one of a commission for KazJester. Three friends stumble upon a strange living artifact in the middle of their living spaceship, which immediately attempts to suck them up, their toes clinging to the squishy floor as the wind begins to pull them in. Guess what happens next???
#alien #sheep #human #jumpsuit #jumpsuits #eye #mouth #maw #sucked #suction #vacuum #inhale #inhaling #feet #paws #rubber #squishy #mmm #maleprey #multipleprey #scifi #scifi #space #spaceship #wind
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