Turbulent Flow is MORE Awesome Than Laminar Flow
Everyone loves laminar flow but turbulent flow is the real MVP.
A portion of this video was sponsored by Cottonelle. Purchase Cottonelle Flushable Wipes and try them for yourself: bit.ly/2WJm9Hq

Special thanks to:
Prof. Beverley McKeon and team www.mckeon.caltech.edu
Destin from Smarter Every Day www.youtube.com/smartereveryday
Nicole Sharp from FYFD ve42.co/fyfd
Pavol Dobryakov turbulent simulations: paveldogreat.github.io/WebGL-...

I got into turbulent flow via chaos. The transition to turbulence sometimes involves a period doubling. Turbulence itself is chaotic motion, it is unpredictable and sensitively dependent on initial conditions. What surprised me is all the ways turbulent flow is useful to us. It is diffusive, meaning it causes mixing. This is useful in jet engines or rocket nozzles (which Destin studies) and is important to achieve in microfluidic devices, which are so small that turbulent flow is actually difficult to achieve. Turbulent flow can energize a boundary layer, which is important to maintain flow attachment over a wing, maintaining lift and delaying stall. Similarly a turbulent boundary layer over a golf ball reduces pressure drag allowing golf balls to fly further. This is the reason for the dimples on golf balls. Flow transitioning to turbulence in the wake of a bluff body can create periodic vortex shedding. This beautiful phenomenon can be seen in the von Kàrmàn vortex street in clouds viewed from space. Turbulence is everywhere, in the air currents in a room, in your aorta, in the breaths you exhale, in oil pipelines and water pipes, in the flow over cars and ships and planes. Animals have evolved for it (like dead fish swimming up stream) and we have engineered our environment, our planes and golf balls for it. Laminar flow may be nice to look at (which is why we use it in decorative fountains) but turbulent flow does the real lifting.

Animations by:
Jonny Hyman (Sun, Jupiter, Reynolds, airfoil, Earth time-lapse)

Research and writing:
AJ Fillo and Derek Muller. AJ also created the wind tunnel golf ball shots

Filmed by:
Daniel Bydlowski and Derek Muller

Additional footage:
Images of Jupiter courtesy of NASA
Turbulence in air currents by the Physics Girl, Dan Walsh, and Grant Sanderson uzmilk.info/number/hZ2awIiProSrYpQ/video.html

illBird "Shaffuru" uzmilk.info/number/bNih1Wtrm4OCl8c/video.html
From EpidemicSound epidemicsound.com "Seaweed" "Colorful Animation 4"
Kevin MacLeod incompetech.com "Sneaky Adventure"

  • Lucas An
    Lucas An

    Bold statement.

  • Robert Haney
    Robert Haney

    I’m proud of how much of this I remembered from fluids 1 & 2

  • Bushmiest3r Bushey
    Bushmiest3r Bushey

    My girl squirts turbulent and laminar flow

  • Bushmiest3r Bushey
    Bushmiest3r Bushey

    My girl squirt turbelent flow

  • JJ TheGent
    JJ TheGent

    Don't tell Smarter Every Day that something is better than laminar flow. 😉

  • Nibu Augustine
    Nibu Augustine

    We owe a lot to Americans who gave us tubes

    • Nibu Augustine
      Nibu Augustine


  • Nibu Augustine
    Nibu Augustine

    Actions can be different spin/charge?

  • Nibu Augustine
    Nibu Augustine

    Explaining weak force.....strong force etc

  • Nibu Augustine
    Nibu Augustine

    Or connects particles

  • Nibu Augustine
    Nibu Augustine

    That vacuum is made of

  • Nibu Augustine
    Nibu Augustine

    Actions being extremely small but heavy particle

  • Nibu Augustine
    Nibu Augustine

    Actions may be very massive

  • Nibu Augustine
    Nibu Augustine

    Sum is close to zero

  • the great lumberjack King
    the great lumberjack King

    Turbulent flow is the most natural flow a cosmic pattern lammener flow is a neat party trick

  • Vaccine Zombie
    Vaccine Zombie


  • Parag Paluskar
    Parag Paluskar

    Speaking of Turbulence, I once came across a documentary about monks in the Spiti Valley in Ladakh, India, who chant ancient scripts in chorus, continously for days and nights in order to bring down rain. Sure enough, on day 3 it rained. What I gather from this is that in ancient times, saints had mastered the technique of causing turbulance through huge number of people engaging in chants using specific scripts that led to phonation that travelled higher up and cause rain clouds to form and encourage precipitation. Long and loud group chants involving praise of lord Shiva and or lord Vishnu (Sri Krishna) have been the foundation of vedic life. This system of chanting has been used prolifically to ward off diseases in Ancient India. I just felt that the application of turbulance in ancient times and studying cosmic chaos thru turbulance is something that got blended into my thought through your video. So thanks for helping me scratch my dead brain, for a change.

  • King rara
    King rara

    yeah, nah. Laminar is better

  • Denny Maple
    Denny Maple

    Like rafting on rapids in a fast moving river

  • Bradeki

    This whole video was a declaration of war

  • Sistla.Abhiram kasyap
    Sistla.Abhiram kasyap

    This was literally my final year project. Back then we checked the effect of creating turbulence around oil rigs.

  • TheZipeedoo

    The diffusion of a fart is turbulent.

  • Guillaume C
    Guillaume C

    All these efforts just to bring me to the conclusion that turbulent flows are even less cool and awesome than laminar flows than what I previously thought... They're everywhere, the most common in the universe, nothing special about it

  • Brandon Owens
    Brandon Owens

    So... why

  • Pradeep Kumar
    Pradeep Kumar

    I can visualise only BLACK HOLE🖤

  • Angel Cuac Cuac
    Angel Cuac Cuac

    This video is going to have some turbulent opinions on the comments 😂

  • Deepanshu Gupta
    Deepanshu Gupta

    The passive aggressiveness in calling Destin a child playing with laminar flow was out of this world 🤣🤣

  • Petrus Pretorius
    Petrus Pretorius

    You made a believer out of me, great vid!

  • StarrClaws

    Best commercial I've ever seen for Cottonelle. Just sayin'.

  • BCY

    What was the name of the app he uses at 5:10 ?

  • Qtaro Kujo
    Qtaro Kujo

    maybe I'm weird but whenever I hear "turbulent flow" or "spiral, l" Junji Ito's Uzumaki pops into mind for some reason

  • Petrus Pretorius
    Petrus Pretorius

    And we all want to thank you for putting together this content 👏👏

  • Chrispewkreme

    Derek, do you think you could possibly work on a video with Kai Lenny? He uses vortex generators made by Minx systems. He runs them on all of his surfboards and swears by them for big wave surfing. It would be cool to really see the science behind it. And maybe test boards/hydrofoils with and without these vortex generators.

  • Bloodhound

    18:00 to us Indian IT'S ALL JUST TISSUE PAPER😂😂😂 East or West Hand faucet is the best 😂😂😂

  • Razia Sultana
    Razia Sultana

    14:17 that fish dont look dead to me at all

  • myTech

    Fibonacci has to do something with turbulence.

  • MaxSup hidden
    MaxSup hidden

    Air within my room 🙂

  • Matthew McGuire
    Matthew McGuire

    Damn. Even your sponsorship add was interesting lol

  • a h
    a h

    Cardiologists dont like turbulence in arteries. Clots can form from turbulence.

  • Dez

    So terminal flow is just the essentially random movements of substances crashing in to each other. Sorry not nearly as cool as laminar.

  • J N
    J N

    the Ve of the day is that he likes it rough

  • J B
    J B

    Turbulent Juice!!!

  • pawelokowidza

    16:15 most interesting adversitement I have seen in a while

  • Earth

    Indian people please turn on caption and look at 0:48 😂😂

  • Kevin Kiestler
    Kevin Kiestler

    Turbulence is a characteristics of a liquid in the sense that Water + Lava = Earth/Air = love and life = laminar and turbulent = knowing & understanding...

    • Kevin Kiestler
      Kevin Kiestler

      My million dollar insight Kevin Thomas Kiestler

  • Thomas Braeuning
    Thomas Braeuning

    So Eddies are in the air. There is literally money in the air, from a cyberpunk point of view

  • Giulio Posenato
    Giulio Posenato

    As an f1 enthusiast I hate turbolent flow

  • Jose Maertinez
    Jose Maertinez

    At 9:10 min. It's so true it's just like I seen a fire hose catch on fire from the how fast the water was traveling in the hose that they turned it in a 90degree angle it starts to heat up and catch fire.🤔

  • Ryu zaki
    Ryu zaki

    Bruh that lady has a PC with win 7 installed 😭😭

  • pirateninja303

    The music is totally from Kerbal Space Program!

  • Camelsson

    Flow discussion and all but I was too focused on the wing during the turbulence generator animation that my eyesight got trippy once it ended

  • MrHeleenify

    I’m so amazed about how much subconscious information your brain stores and can relate to conclusions: Do you see turbulent turbulent vortexes in the clouds? You get the immediate feeling land must be close by. See the strings on the air plane move stochastically? You know you must be slowing down.

  • just another account
    just another account

    Laminar is more interesting visually Turbulent is more interesting mathematically

  • Bodhisattwa Ganguly
    Bodhisattwa Ganguly

    Something on cricket balls 🤔 Inswing, flight and reverse swing aerodynamic

  • Donrock

    0:07 For real heard "Playstation Comander"

  • Family activity
    Family activity

    Caos cannot result a good. There must be equation. Randomness cannot be accepted

  • Harkirat Singh
    Harkirat Singh

    Laminar is cool but the universe loves turbulence

  • Beau VSB
    Beau VSB

    Will I get a noble prize if I solve the problem with turbulence using navier stokes?

  • Coach Rambo
    Coach Rambo

    If you're at home rather than flush anything down the toilet, why not just use a soapy washcloth? You'll be cleaner AND doing a great service to society.. Toilet paper leaves behind alot of bacteria.. Think about it!

  • Ridhwan Mazlan
    Ridhwan Mazlan

    Turbulent = van gogh painting, art nouveau, floral and nature. Laminar = everything that has "modern" in the title.

  • Michael Blesi
    Michael Blesi

    So space is a fluid of emptiness?

  • Addigan

    this video was great! it really helped me fall asleep last night, appreciate it! i got insomnia, but this video had me sleepin in no time :)

  • havidgekoochek

    I would have thought Flushable Wipes sponsoring a show about flow against logic.

  • far amen
    far amen

    The wary door essentially offer because ground sicily ruin by a smiling engineering. perpetual, lean energy

  • Eugene Elkin
    Eugene Elkin

    🤣NICE AWES0ME C00L_ 🍨🍚🍚🍚🍚🍚🍚🍚🍚🍚🍚🍚 💨 🍮 🥧 🍡 🍧 🍨 🍦 🍰 ❗ 🐬 🌺 🌺 🌺 🥀 🌹 🌷 🍁 💐🍂 🐡🐄 🐅 🐆 🐯 🍣 🍣 🍣 🥘 🍨🍨🍨

  • JacksonChen666

    not even close

  • NickXenix

    Turbulent flow be like Chaotic Neutral

  • Glynne Pritchard
    Glynne Pritchard

    As a Hydraulic Engineer Ill stick with laminar flow please

  • Hernan Posnansky
    Hernan Posnansky

    Underneath a 'turbulent' boundary layer over a smooth wing there is a LAMINAR sublayer. A laminar boundary layer is stabilized by a negative pressure gradient and also by a small amount of suction through a series of 'slots' Realized on a wing by Dr Werner Pfenninger on a modified B-66 to significantly reduce the skin friction at large Reynolds numbers

  • Minecraft Cringe
    Minecraft Cringe

    9.99 Mil!!!!!!

  • Storming Heaven
    Storming Heaven

    This also applies to the machine shop! As the metal “hits” metal and cuts. There is a flow zone at the point of contact where molten metal slides across the cutting tool. Sandvik has done a good bit of research.

  • umcosta

    This channel alone, taught me more than most of my years of school.

  • Zachary Davis
    Zachary Davis

    💙Great content 😂 Turbulent and Laminar are both great(IMO), but love the enthusiasm behind the sales pitch for Turbulent lol hope there is a lot more content to come !

  • Katarina Novakova
    Katarina Novakova

    Turbulent Flow is more awesome. Because Van Gogh

  • Charlie Melidosian
    Charlie Melidosian

    Did anyone else catch the creaking floor around 14 minute mark and at the 15:08 mark? I paused and took my headphones off a few times 🤣😅

  • jarred talbot
    jarred talbot

    The video was good the sponsor part total garbage. As a district supervisor of hundreds of apartment homes noo those are not flushable try to compare that do normal toilet paper, not to other no flushable... It's not a comparison what so ever doing that. Also if there is an actual flushable they are only actually flushable in pvc or abs only.. most homes still connect to street pipes that are ancient old rigged pipes that will definitely clog with those. Please people don't flush anything but tp and yo shits

  • ShuRugal Oorus
    ShuRugal Oorus

    Uh, no, the reason planes are frequently washed is so pilots can pose for planewash pictures. source: am pilot.

  • Eric Bowling
    Eric Bowling


  • X3R0 Prime
    X3R0 Prime

    your test on flush-able wipes lacks a control group where you see if it can support the weight before being submerged in water. Do they actually break down in water, or do they just lack the strength to support the pennies in the first place?

  • The Donut Man
    The Donut Man

    This is the very first time, where i have clicked like and it increeses by a thousand.

  • RPG1118

    You should have called this video “can a dead fish swim upstream? YES”

  • Ian J Barker
    Ian J Barker

    I remember struggling with fluid dynamics more than any other class in college because, until then, science had seemed to make intuitive sense. It was the first time I had to listen to what science was telling me and just say, "okay, if you say so."

  • JC Aranda
    JC Aranda

    You sold me. Turbulence is far more interesting. Laminar flow is boring.

  • Udayan Patil
    Udayan Patil

    We should have a button like everytime you visit and like it, you should be let to do

  • ItsOnlyGenjutsu

    All the reasons listed are what make Turbulent Flow worse... The reason Laminar Flow is so awesome, is BECAUSE it's the exception not the rule. Just as we like rare finds, exotic foods, antiquated items, and the rarest rocks we can obtain. No one likes common pebbles over onyx, ruby, lapis lazuli, sapphires amethysts, diamonds, gold, ect. Laminar Flow is a spectacular, Turbulent Flow is inevitable. Life is a gift, death you cannot resist. Title should of been "Turbulent Flow has more merit than you think" or "Utility of Turbulent Flow vs Laminar Flow's Novelty" ect. If you think it's Utilities are cool or Turbulent Flow as a concept is cool... Cool, but it doesnt look cool and it doest feel unique like Laminar Flow. That needs proper prerequisites met to exist. Turbulent Flow can be made by any disturbance, a finger, a hand, a foot, light gusts, a stick in a tub of water... doesn't hold up man. I watched the whole video to see if you changed even your wording. But, you werent even comparing Turbulent Flow on the same field that Laminar Flow plays in lol. It's like saying Day is COOLER than night because feeds plants, produces vitamin D, and is warmer! Yeah well it causes cancer and destroys DNA too. Night and day argument is based on the awe factor, or how it makes you feel when you experience it(I know there can be more to the argument, such as heat/cold, lonely/lively ect). Ah! Here it is! It's like comparing two paintings, one is the Mona Lisa and the other is a child's scribblings of a banana... and you say the banana is cooler because bananas are useful and nutritious and they are more common then females named Mona Lisa... (sorry, but you guys gotta experience me trying to work out a proper example too! 😅)

  • Bing Boong
    Bing Boong

    If you had enough computing power, you could absolutely predict turbulent flow. It's not even hard to rationalize we just don't have the technology yet.

  • Victor Romário Alvez Zaak Saraiva
    Victor Romário Alvez Zaak Saraiva

    This video changes nothing. Laminar flow is still better

  • Zeeshan Misha'il fouzi
    Zeeshan Misha'il fouzi

    Who else guessed Destin would comment on this.

  • Stevie B
    Stevie B

    Fish didn’t evolve….ask destin

  • Leonard Cole
    Leonard Cole

    I’m with Destin. Laminar flow for life.

  • dismalthoughts

    Today I learned the Universe is dominated by turbulent skin friction. I knew it...

  • Jason Justice
    Jason Justice

    If laminar flow has a specified definition, why is the definition of turbulent flow not “any flow that is not laminar”? Just a quick thought exercise.

  • Alicia Adams
    Alicia Adams

    The frantic fan prominently rot because leo seasonally gather next a raspy case. faint fair, embarrassed plantation

  • Scrappy Bob Barker
    Scrappy Bob Barker

    Laminar flow is awesomer!!!!!

  • Serfdomftw

    Looks like the experiments showing laminar flow are not actually showing laminar flow, as they lead to turbunelt flow. Or in other words, they were never perfectly parallel to begin with.

  • Nate Crabtree
    Nate Crabtree

    Laminar flow gives my racecar downforce. Controlled turbulent flow off of canards creating vortices help make more downforce. Laminar flow is faster= better

  • criz nittle
    criz nittle

    In summary: dead fish can swim upstream

  • Ayrton Urviola
    Ayrton Urviola

    Wait... Isn't chaos deterministic? (but REALLY hard to predict)

  • Jack Nemo
    Jack Nemo

    Need a tee shirt that says "Dead fish don't swim in Laminar flow".

  • ShiftyFish

    Turbulence is everywhere and its cool, but you gotta put in effort just to get laminar flow. Like pull ups are cool but anyone can do 3 of them but to see someone crank out 20 in a row would be way more impressive.

  • Chris Stewart
    Chris Stewart

    Hold up, back the horse up a bit to 4:10 . Turbulence in our atmosphere makes stars twinkle? Are you sure that is right? Not saying it isn't but I do know for a fact, as someone that uses this method to find Saturn and point a telescope at it, that planets don't twinkle. Look at the night sky and the planets look like stars... but they don't twinkle. So why would turbulence make stars twinkle but not planets?