Fluid dynamics explain what happens when dogs drink water

If you’ve ever watched a dog , you know that it can be a sloshy, spilly, splashy affair — in other words, adorable.

Behind all of the happy, wet messes, however, lies the mechanical logic of carnivorous compensation — dogs splash when they because they have the cheeks of a predatory quadruped. By studying the drinking habits of various dog breeds and sizes, a group of researchers at and has recently identified and modeled the at play when dogs .

The findings will be described today in a talk at the American Physical Society’s Division of (DFD) meeting in San Francisco, Calif.

“Three years ago, we studied how cats ,” said Sunny Jung, an assistant professor at Virginia Tech. Jung’s research focuses include biofluid mechanics and the nonlinear interactions between soft bodies and surrounding fluids. His current project is sponsored by the National Science Foundation’s Physics of Living Systems program. “I was curious about how dogs drink, because are everywhere.”

As members of the order Carnivora, cats and dogs have incomplete cheeks, which allow them to open their mouths wide to deliver killing blows. But what makes pack hunting possible also makes suction drinking impossible. Unable to seal their cheeks completely, there is no way for a dog to suck up water. Conversely, humans have “complete” cheeks, and we by creating negative pressure, allowing us to suck water into our mouths and down our throats.

Cats, too, lack suction, and they compensate by drinking via a two-part “water entry-and-exit” process. This consists of a plunging and a pulling phase, in which a cat gently places its tongue on the water’s surface and then rapidly withdraws it, creating a column of water underneath the cat’s retracting tongue.

“When we started this project, we thought that dogs similarly to cats,” Jung said. “But it turns out that it’s different, because dogs smash their tongues on the water surface — they make lots of splashing — but a cat never does that.”

When dogs withdraw their tongue from water, they create a significant amount of acceleration — roughly five times that of gravity — that creates the water columns, which feed up into their mouths. To model this, Jung placed cameras under the surface of a to map the total surface area of the dogs’ tongues that splashed down when drinking.

The researchers found that heavier dogs water with the larger wetted area of the tongue. This indicates that an allometric relationship exists between water contact area of the dog’s tongue and body weight — thus the volume of water a dog’s tongue can move increases exponentially relative to their body size.

In order to better understand how the physiology works, Jung and his colleagues could only go so far

… Continue reading here.
Dogs News — Sciencedaily

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Comments

    • MatthiasRosberg
    • November 27, 2014

    Big thumbs up for table tennis dog

    • james friel
    • November 27, 2014

    I like that its a 30 minute video posted by 1 hour full long compilation.
    Fail

    • Lynxio
    • November 26, 2014

    Its funny that people think dogs can understand english, when to them its
    just a mumble of sounds.

    • Cerys Leigh
    • November 26, 2014

    The 9:00 point used to be my dog but I gave her away her name is/was Anika

    • Bryan Jones
    • November 26, 2014

    Hello,

    I am making a presentation of animal videos as part of a reel for a
    tradeshow and wondered if I can use this footage? It will not be posted
    anywhere, only shown at a tradeshow related to the condominium industry in
    Toronto, Canada. Thanks and please advise!

    • Carlo J Vella
    • November 26, 2014

    The only thing I dislike about these vidz when I see people putting shoes,
    or whatever on dogs. This causes alot of stress within dogs. It is
    entertainment for people but not for the poor dog. Animals are not made to
    play dress ups!

    • Dog Savvy
    • November 26, 2014

    16:57 – Brilliant!!

    • angelgirl21luv
    • November 26, 2014

    DONT CALL DOGS STUPID!! 

    • Madison Spaulding
    • November 26, 2014

    I HATE CHIHUAHUAS I HATE THEM THEY ARE SO WEIRD :O ”I HATE THEM PEOPLE I
    REALLY DO! DONT RESPOND CAUSE ITS MY OPINION!

    • Lovely Untamed
    • November 26, 2014

    Cats are funnier

    • Luiz Carlos da Silva
    • November 26, 2014

    olha que lindo

    • Owenn1993
    • November 26, 2014

    I fucking hate cats

    • Deisia Lind-Kaina
    • November 26, 2014

    Hahaha! Funny! Now I want a puppy lol

    • gta4fan556
    • November 26, 2014

    I find it stupid when people put clothes on dogs….. Why world?
    Just………why

    • Saito Touhara
    • November 26, 2014

    So many people who don’t know anything about raising a dog. When the dog
    avoids eye contact and gets on it’s back, it’s showing signs of submission.
    Telling it to look at you is basically saying “please get aggressive and
    bite my face off”
    Like at 10:45

    • 1 Hour Full Long Compilation
    • November 26, 2014

    1,000,000 views!!! We want to thank you to all our viewers and subscribers.
    #onehourcompilation 

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