Turbulent Flow is MORE Awesome Than Laminar Flow
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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 svsoft.info
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 svsoft.info/award/gG3Jk4SK3rPYk2A/video.html
svsoft.info/award/kYvUiIakm5mTxXU/video.html

Music:
illBird "Shaffuru" svsoft.info/award/Z6jQqGdmy7KvyJM/video.html
From EpidemicSound epidemicsound.com "Seaweed" "Colorful Animation 4"
Kevin MacLeod incompetech.com "Sneaky Adventure"

Kommentarer
  • Charles Brouillette
    Charles Brouillette

    Is that dead fish thingy like slipstreaming a race car behind another? Also also I fell in love with the images of Jupiter and knew instantly from the fish tank visual I was thinking the surface of the sun

  • Mahfk Namsayn
    Mahfk Namsayn

    What if there is no such thing as laminar flow and its all just turbulent but at such a size that we can't perceive the turbulence, like how the earth is rough but if it where shrunk down to the size of a golf ball it would be smooth

  • Dark Warrior
    Dark Warrior

    Well, you convinced me Turbulentflow best

  • Angus Wills
    Angus Wills

    I love your telescope which model is it

  • nitish kumar
    nitish kumar

    The way you people describe things, it makes people stop thinking their own and make your beliefs their own and more concrete in nature. Is it good to know or is it stoping us to look far and accepting what you are telling. Or is it stoping people from being creative, and thinking on its own??

  • David Burleson
    David Burleson

    I came here not knowing what either even was

  • Anime Senpai
    Anime Senpai

    Splashes in water due to bombs. :)

  • TheLupineFriend -lastname-
    TheLupineFriend -lastname-

    Apparently my schedule's structure is not uncommon.

  • Jakub Znojemský
    Jakub Znojemský

    Lets hope you will enjoy turbulences on your flight then :D

  • Troy Spartan
    Troy Spartan

    Hey guess what? Who gives a poop!!!

    • TheDeviBoi :-D
      TheDeviBoi :-D

      Me,I do

  • ImBlackMagic
    ImBlackMagic

    technically you can predict fluid motion using the naviera stokes equations at least using numeric methods, but it's very expensive, so it's way easier to use probabilities...

  • Wonder Wang
    Wonder Wang

    Why a dead fish can swin?

  • Dark Shards
    Dark Shards

    I jUst lovE cHaos in aLl it's foRmS.

  • David Homan
    David Homan

    All turbulent flow can be predicted if you have enough sensors. But oops, Too many sensors affect the flow.

  • Madeleine H
    Madeleine H

    I noticed you were very specific about which kinds of clouds are formed in turbulent flow, so it made me wonder if there are clouds formed in laminar flow naturally, like, is it possible for the wind/atmosphere to even have laminar flow? And apparently yes, yes it is, and lenticular clouds are very cool.

  • jacky mai
    jacky mai

    The left sweatshirt lastly suspect because linda weekly frame following a square fired. annoying, permissible columnist

  • Joseph D'Angelo
    Joseph D'Angelo

    It's just constructive and destructive inference patterns. Turbulent flow brings rise to laminate flow which gives rise to turbulent flow.

  • _edd.ie_
    _edd.ie_

    Laminar flow is the influencer you think you'd want to date till you realize they all have the same plastic surgeon and a bulb has more personality, while turbulent flow is the one you never noticed but once you do your relation is as intense as a tornado it's beauty is as mesmerizing as a waterfall and when you truly get to know it you become better, learn to fly, can even predict the weather and realize even in the chaos there maybe order...

  • jerry pv
    jerry pv

    Fluid dynamics at it's peak

  • Karthik Kusuma
    Karthik Kusuma

    Turbulent is natural.... Laminar is Artificial/ man made.

  • secret garden
    secret garden

    We need a dimpled ping pong ball

  • Jordan Larson
    Jordan Larson

    dead fish??? how was that dead?? I'm so confused

  • Andy Hiett
    Andy Hiett

    Holy crap there's a lot of science in this video! I love it!

  • Jason Davis
    Jason Davis

    Would be nice to see some color in that

  • Dexyたん
    Dexyたん

    When someone is trying to make a case for prog metal: turbulent flow

  • will blizard
    will blizard

    he gets drive by turbulence

  • christianxfb
    christianxfb

    You have summarised one semester of physics for me. Thanks lots Veritasium!

  • Michael K
    Michael K

    Turbulent flow, snowfall. Laminar flow avalanche.

  • ztoob8898
    ztoob8898

    The Voyager around-the-world airplane NEEDED vortex generators to be safe to fly. The canard (front wing) was a laminar-flow airfoil that lost all its lift when raindrops clung to the surface. Vortex (turbulent air) generators scrubbed the raindrops off the canard's top surface, making Voyager safe to fly through rain. The Cessna 177 aircraft was designed with a laminar-flow wing, and it works fine until you stall it. The stall entry gives zero warning and is very abrupt. Non-laminar wings give you some warning of incipient stall through buffeting. So yeah, turbulence rocks!

  • Joseph Daggett
    Joseph Daggett

    W out laminar flow there's no flow in turbulence....??? Fools 😠

  • ray Nic
    ray Nic

    What came first, laminar or turbulent flow?

  • Sarath Santhosh
    Sarath Santhosh

    So my opinion.. Turbulent flow is awesome and laminar flow is beautiful.. BTW thanks for the video and new info ❤️

  • gkp
    gkp

    They use to make sailboats for America's Cup as smooth as possible but then they looked at how shark skin is bumpy yet they are fast, so they used a bumpy paint

  • Coop Pugh
    Coop Pugh

    Destins gasp and *actual brainfreeze* makes me laugh every time

  • Stamis Aviation
    Stamis Aviation

    As a pilot calling turbulence cool offends me

    • Stamis Aviation
      Stamis Aviation

      Other than vortex generators of course

  • donocono
    donocono

    So, like, Tame Impala?

  • Kurt and Debbie Veltre
    Kurt and Debbie Veltre

    So the stick in the golf ball does not affect its aerodynamics?

  • Navjyot Singh
    Navjyot Singh

    Well if one has done Pot or mariJane. Then they love turbulent flow. Dustin hasn't...ergo..

  • Bidentity Politics (CallaMate)
    Bidentity Politics (CallaMate)

    Chaos vs Order. I didn't come here expecting Jordan Peterson!

  • FieldMarshal590 (FieldMarshal590)
    FieldMarshal590 (FieldMarshal590)

    Laminar flow is a very pretty "action". Turbulent flow is a very beautiful disaster.

  • Miki Simans
    Miki Simans

    This video is fake, ugly ducklings don’t exist

  • Masa Fulgur
    Masa Fulgur

    It's a form over vastly greater and overwhelming function kinda discussion at that point. XD

  • Christoph Michel
    Christoph Michel

    Really a excellent video till the last minute. I always enjoy your videos.

  • Ck digital The Q of 6th
    Ck digital The Q of 6th

    Mathematics is not how the Universe works, it is mankinds way of translating the cosmo, its like a search engine on the internet translating language, the other person won't know wtf your trying to say, However, you coukd use an AI to study the mimic paddern or Turbulence, thus getting a close equation, that it may translate.

  • Halo18
    Halo18

    turbulant flow is like classical music and laminar flow is like pop music its easy to enjoy pop but harder to understand classical, but classical so much richer

  • Enthusiastically Emily
    Enthusiastically Emily

    The blood in your heart may be turbulent, but if the blood in your blood vessels gets turbulent you have a serious problem actually! Turbulent vs laminar flow is important in cardiac physiology! And fun fact - blood is a non-Newtonian fluid, as it doesn't have a constant viscosity ^_^ But thank you for the video it is AMAZING!

  • blepblops
    blepblops

    Desire for order? Hah! Chaos is always more beautiful

  • Darren O
    Darren O

    Turbulent flow is great but Destin is right laminar flow is better

  • Spencer Bryant
    Spencer Bryant

    best way to do a sponsor ad I've seen so far

  • Asaiya
    Asaiya

    Wait Destin is from Huntsville? like Huntsville ON, Canada? i live like an hour from there, i need to come see destin!!!

  • Marjannuel Saturnino
    Marjannuel Saturnino

    Laminar is so rare and that's what makes it beautiful

  • A B
    A B

    @ 2:45 Those are fighting words. LOL 😂 🤣😆

  • james ehrhart
    james ehrhart

    Only turbulent flow can move the gold so I'm team turbulent!

  • FaZe CrAzY626
    FaZe CrAzY626

    I'm team laminar now because I hate lightning and lightning comes with rain. And rain is made from/assisted by turbulence.

  • Chandis Raygor
    Chandis Raygor

    Ive always found turbulent flow awe inspiring without knowing it was turbulent flow until today.

  • Enjoy Plant Power
    Enjoy Plant Power

    I almost spat my tea out when the dead fish made its appearance! 😂

  • Trevor Smith
    Trevor Smith

    The fish was dead? Did I hear that right...?

  • hick schnak
    hick schnak

    Did they really throw a fish in turbulence? :D

  • Great Tesoros
    Great Tesoros

    5:33 Velocity of the fluid x characteristic length[say diameter of the pipe] / the viscosity of the fluid. Think of the internal friction. I solved the formula... Ur Love over a V. to much and your life turn out turbulent. Reynolds was just trolling.

  • Mahammadou Tunkara
    Mahammadou Tunkara

    Thank you

  • DraXxuS
    DraXxuS

    What I want to know, is how they got the effects at the 5:10 marker. I need that in my visual art.

  • nil0bject
    nil0bject

    Nothing is unpredictable. Stop spreading false information and lies

  • SpoonyJank
    SpoonyJank

    Some of those animations were more fractal than chaotic.

  • Mike Wilson
    Mike Wilson

    Wrong!!! 8:15 the air at the surface would blunce upwards not flow

  • herm derm
    herm derm

    I’m still tripped out that a dead fish will still swim I woulda just thought it would get just get pushed to the back of the box

  • Chuck martin
    Chuck martin

    Thanks for getting me addicted to your channel. I'm so darn distracted now I can't get any work done

  • Mart Edits
    Mart Edits

    So what would happen if you coated the inside of a pipe with a hydrophobic substance and then induced laminar flow? Could you then have high speed laminar flow?

  • Joe Carbonara
    Joe Carbonara

    At first I thought the sponsorship was pretty random, then I thought about where I am most likely to watch these videos, and it's downright genius.

  • Nolan Jakrzewski
    Nolan Jakrzewski

    Would the solar system be laminar movement?

  • Blind Camel
    Blind Camel

    Just cause the human brain is not intelligent enough to predict the pattern of turbulent flow doesn't mean it's not predictable you could complexify a laminar flow so much that it appears to be turbulent to the average human which means in the deepest depths of complexity all flow is laminar... thank you thank you thank you everybody now where's my nobel prize?

  • faroria
    faroria

    Breath of the wild 2 be like : 14:04

  • Na Mo
    Na Mo

    Mr Veri you really need to study cricket balls,being American perhaps you should study base balls,there is a science incurved balls but if you really want to get blown away you must study how they make the cricket ball move back and forwards in flight.Something similar is done to the soccer ball

  • Na Mo
    Na Mo

    This is becoming personal

  • Brad Schneider
    Brad Schneider

    Saying laminar flow has to be small( in scale I take it). Isn't a fact. We just haven't answered its opsticals.

  • bob bobman
    bob bobman

    Can you explain how it is that the wipes are moist in the package but they don't breakdown until they are put in the toilet?

  • Bunky Does
    Bunky Does

    Everything was fine until the dead fish swam upstream...

  • prince joopie
    prince joopie

    This video (as of when I'm writing this comment) has 2.8k dislikes, and I bet half of them are just Destin making new accounts.

  • Jackson Laframboise
    Jackson Laframboise

    Lol. Now I wanna see what laminar boi has to say now.

  • Jasraj Singh
    Jasraj Singh

    You’ve made me swich sides I’m now a turbulent fan

  • Blind Camel
    Blind Camel

    you placed the pennie roll on the paper towel then slighlty dropped it on the cotonel flushable wipe rather than placing it

  • Krissh Sawant
    Krissh Sawant

    I need to know what liquid that was

  • Debussy Chopin
    Debussy Chopin

    You still should not be flushing those cottonelles.

  • Roorah Clark
    Roorah Clark

    flushable wipes arent flushable

    • Roorah Clark
      Roorah Clark

      although i dont know about that specific brand

  • Colton S
    Colton S

    ive always beena turbulent flow kinda guy. this made me happy.

  • Saturn2888
    Saturn2888

    "You change one thing and that alters the final state." sounds like turbulent flow was designed by a software engineer.

  • James Thomas
    James Thomas

    In a world where physics have a defined mathematical pattern of movement, regardless of whether we understand it, wouldn't all flow be laminar? Turbulent flow is just the combination of many laminar flows colliding creating turbulence, thusly creating more laminars colliding, turtles all the way down. Laminar: 1 Turbulent: you'll know the score when you see it

  • akeem coleman
    akeem coleman

    11:35 so this is why p-51s stall easily when landing? Because they got rid of most of the turbulent flow?

  • Noah Malaluan
    Noah Malaluan

    I’ve witnessed turbulent flow on acid

  • JackTopper
    JackTopper

    This was so goddamn cool.

  • Ryan Lemeur
    Ryan Lemeur

    When you're so far away from middle school that every formula in this video were on your midterms

  • It Doesn't Suck
    It Doesn't Suck

    Talking about turbulent flow like it's an arranged marriage. 😂🤣

  • Kyle Ruiz
    Kyle Ruiz

    Turbulent flow is everywhere in nature and unpredictable, that's why laminar flow is better, when you can get something as powerful as water to define its nature and be predictable and cooperative, thats when laminar flow really shows its beauty, science is most beautiful when you define the natural order of things

  • mo sohail
    mo sohail

    What the blue liquid called 1:55

  • Lorenzo H.
    Lorenzo H.

    If you have this pipe which has the diameter there it is just beginning or already turbulant wouldn' we get a laminar flow again if we rotate the linear pipe in its longitudanal center point (I guess it should have a favorite side on each side N-S on planet earth)? So turbulant flow is about encountering physical objects or itselves from A to B. Whilst its particles which hit objects or itselves get a higher frequence and the stroken object or own flow at that point in the way get a deeper oscillation with the striking/hitting event. The lower frequence is the force which gives the final punch to induce evasion. The higer frequence induces the striking particles to get stationary or inert.

  • iLuZioN Tv
    iLuZioN Tv

    This man made a dead fish swim upstream

  • Daniel Corrigan
    Daniel Corrigan

    I just discovered how weird fluid dynamics are

  • jdmj707
    jdmj707

    Huntsville??? I’m from huntsville!!!!!!!!!!!!

  • j2157
    j2157

    I guess, why turbulent flow is more abundant than laminar flow is cuz of entropy , thus, random flow of fluids is something, we can expect to be seen more often