Stress, Strain & Quicksand: Crash Course Engineering #12

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Today we’re talking all about fluid mechanics! We’ll look at different scales that we work with as engineers, mass and energy transfers, the no-slip condition, stress and strain, Newton’s law of viscosity, Reynold’s number, and more!
Crash Course Engineering is produced in association with PBS Digital Studios: • All PBS Digital Studio...
***
RESOURCES:
www.howacarworks.com/technolo...
www.automobilemag.com/news/ben...
www.engineeringarchives.com/le...
farside.ph.utexas.edu/teachin...
www.nde-ed.org/EducationResou...
www.engineeringtoolbox.com/st...
www.britannica.com/science/fl...
www.britannica.com/science/vi...
www.mne.psu.edu/cimbala/Learni...
mechaengineerings.wordpress.c...
www.britannica.com/biography/...
www.grc.nasa.gov/www/BGH/reyn...
www.uotechnology.edu.iq/dep-bu...
www.princeton.edu/~gasdyn/Res...
www.engineeringtoolbox.com/la...
www.teachengineering.org/acti...
sciencestruck.com/what-is-rey...
www.princeton.edu/~asmits/Bic...
***
Crash Course is on Patreon! You can support us directly by signing up at / crashcourse
Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:
Mark Brouwer, Erika & Alexa Saur, Glenn Elliott, Justin Zingsheim, Jessica Wode, Eric Prestemon, Kathrin Benoit, Tom Trval, Jason Saslow, Nathan Taylor, Divonne Holmes à Court. Brian Thomas Gossett, Khaled El Shalakany, Indika Siriwardena, SR Foxley, Sam Ferguson, Yasenia Cruz, Eric Koslow, Caleb Weeks, Tim Curwick, D.A. Noe, Shawn Arnold, Ruth Perez, Malcolm Callis, Ken Penttinen, Advait Shinde, William McGraw, Andrei Krishkevich, Rachel Bright, Mayumi Maeda, Kathy & Tim Philip, Jirat, Eric Kitchen, Ian Dundore, Chris Peters
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Опубликовано:

8 авг 2018

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Комментарии : 133

@Restryouis 6 лет назад

This looks so simple, but oh boy, when you go deep into it...

@SteevenAnderson 4 года назад

LMAOOO

@fightingdreamers77 4 года назад

Trying to learn it for personal projects. Just gotta keep moving no matter how hard it gets.

@noalear 6 лет назад

I feel like stress and strain need a few episodes each. This stuff is so, so important.

@Anonymous-cv8uh 6 лет назад

I’m taking fluid mechanics during the spring semester and I’m so pumped for it. Lol pun not intended.

@Thepeople134 5 лет назад

It’s fun and games until you hit navier-stokes

@yeahboi1577 6 лет назад

I'm starting my fall semester in 10 days and I'm taking fluid mechanics too. thank you so much I'm actually excited to learn about fluids now lol

@gobblinfker 6 лет назад

good luck!

@Ac35nip3r 6 лет назад

If you haven't already, I'd recommend you watch some lectures from Ron Hugo or Michel Van Biezen to prepare yourself. I took Fluids last spring and barely got away with my sanity and a high B. Best of luck to you!

@Petch85 6 лет назад

Is is not the easiest stuff to calculate. But Thermal Dynamics and Fluid Dynamics is so much fun. I loved it. And I yous it all the time, even though it is not my work.

@engibear6392 6 лет назад

*The Bernoulli equation. Learn it. Now.*

@jackhanson1852 6 лет назад

Good luck! I always enjoyed fluid dynamics classes, it goes quick I promise 😊

@Petch85 6 лет назад

Best CrashCourse ever... EVER!!!! I love it... I think it is easier to understand stress and strain in the context of beam theory. And then defined a fluid as a solid not able to carry stress in tension. But this works too... I am looking forward to the FE and CFD videos it is going to be amassing.

@yondaime500 6 лет назад

In microfluidics, the flow is always laminar because the diameter is tiny (less than a millimeter), so when you pump in two different fluids, they don't mix easily. If you look up "microfluidic chip", you'll see that most of them have a zig-zag shape. That increases the length of the channel so the fluids can diffuse into each other and mix evenly along the way (although there are other reasons why you would want to make the channel longer).

@Malfunct1onM1ke 6 лет назад

I am taking Fluid Dynamics next Semester for my Engineering Studies. Thanks for the first insight, Shini & CC-Team :)

@tomasferro1888 4 года назад

How did it go?

@laurenadegoke6754 5 лет назад

I'm taking biomedical transport phenomenon and it is basically fluid dynamics.. I can assure you all it is not fun. Thanks crash course for breaking this down for others.

@jamessol7400 5 лет назад

You can either watch these videos for overview skim which actually makes your sch/uni/coll lesson easier or you have already learnt these at sch/uni/coll then come and watch for better understanding. Both actually worked. I have already tried with chemistry, physics, biology, anatomy and physiology.

@phucaonguyenhong6275 6 лет назад

Great episode, as always.

@lazytv4318 6 лет назад

Ansys Fluent CFD is an interesting and helpful program for fluid mechanics/dynamics. Kind of wish they would talk about problems like cavitation or water hammer/hydraulic shock, unless that is in the next part...

@theodddodo 5 лет назад

Great video, thank you. Just a small point I think might need correcting: In the diagram accompanying the normal strain equation, I think the subscript of the total length (on the top) should be T for total. This would differentiate it from the shear strain LF.

@Arieta4hearts 6 лет назад

i love this!! this really interests me!!

@mikey10006 6 лет назад

We did this in a level physics I love it :)

@flamephlegm 5 лет назад

Normally I find the host speaks a little fast for me, but this ep was perfect. As always, full of great info.

@quinius173 6 лет назад

Great video!

@alexanderhoppe3883 4 года назад

I learned more in this video than in half of my lectures on fluids mechanics

@BrunosSquirrel 6 лет назад

OMG where were you this year when I failed my exam on rheology?!

@anaya1524 6 лет назад

Definitely needed this XD

@dan1204hc 5 лет назад

You can work and research fluid mechanics (more deeply) following the career of Chemical or Mechanical Engineering.

@davem4998 6 лет назад

My new favorite teacher😍

@ximenaguevara8883 6 лет назад

I'd like to traslate these amazing series into Spanish since It's my mother tongue and I am really sure that some people around me or just that don't speak English would find them so helpful and interesting. Would it be possible drop the link here for that porpouse?

@tzk86 6 лет назад

How does the fluid(s) tendency changes in coating proccess of Poly films and membranes?

@Karthikeyan-gp1yf 4 года назад

Thanks

@VincentTravelStory 5 лет назад

Wish this video comes out sooner

@rakeshbam9883 4 года назад

I had take the video 2x slower to make listening optimal since the delivery is very fluid.

@ItsSoAndrew 5 лет назад

WHY DIDNT YOU GUYS MAKE ENGINEERING SOONER!!! ANYWAYS THANK YOU FOR THIS

@alexwalton8951 4 года назад

could you help me a two question i need to understand them.. 1) Water flows through a pipe 4cm in diameter and 38m long between two tanks with square edged non projecting entrance and exit. The flow rate is controlled by a gate valve which when fully open has a loss factor of 0.32. What is the height difference between the tanks if the volume flow rate is 3.8 x10-3 m3/s. For laminar flow f=16/Re For turbulent flow f=0.08/Re0.25 Density of water, ρ , is 1000kg/m3, viscosity of water, μ , is 0.001Pa.s. 2) The viscous torque produced on a disc rotating in a liquid depends upon the diameter D, the speed of rotation N, the density ρ and the viscosity μ . The equation taking the form:- T = ρ N 2 D 5 φ ( ρ N D 2 μ ) In order to predict the torque on a 1.8 diameter disc rotating in water of density 1000kg/m3 at 129 rev/min a model is built to a scale of 1/4. The model is rotated in oil. Calculate the speed of rotation, in rev/min, for the model to produce dynamic similarity. The oil density is 785 kg/m3 and the dynamic viscosity of the oil is 4.7 x 10-4Pa.s. The water dynamic viscosity is 1 x 10-3Pa.s. thanks

@howthech 6 лет назад

Thank you! This helped me study for my English 12 B exam.

@parzh 6 лет назад

5:07 Osborn Reynolds should be the name of some superhero from MCU

@holzdamolz 6 лет назад

CrashCourse, Are you able to make your content available on podcasts? I would love to listen to your videos while I work

@Andy-km1xp 6 лет назад

Download the videos

@rothsshvili5125 4 года назад

download as mp3

@sugami82 6 лет назад

In the UK we don't graduate from college, we graduate from university. College is like an alternative for school, for A-Levels and other qualifications before you'd go to uni :P Must have felt weird for Dr. Shini to say that :P

@shayraviv2368 6 лет назад

Can you guys make a linguistics course?

@shayraviv2368 6 лет назад

Flaming Basketball Club thanks,hope so

@kimberlymartinez8813 6 лет назад

Hi this year I am taking physics 1 which textbook to buy would you recommend

@mohammadyousef5815 6 лет назад

Rho V D by Mu... why did you remind me?? now the nightmares will come back gain ;(

@Fenderbender7235 6 лет назад

Interesting

@shamm9374 6 лет назад

That's David Tennant in the animations.

@nickc3657 6 лет назад

My first time watching- thank you, crash course, for giving a platform to a woman of color in STEM. You’re being the change we need in the world.

@BlueyMcPhluey 6 лет назад

she had a great series on Physics as well. She's not just a WOC, she's an incredible teacher

@Hansca 6 лет назад

Nick C pretty bloody patronizing! You should check your privilege!

@Danilego 5 лет назад

4:20 that Engineato sounds kind of dirty lol

@EStreaks 6 лет назад

Make more vids on engineering

@francisabellana445 6 лет назад

Wow 8 000 000 subs

@traciesweeney3576 5 лет назад

shini's favourite episode

@dharmaprakashaj 5 лет назад

Quick sand is dilatent or pseudo plastic?

@awesomeaust5410 4 года назад

Can anyone help me. I want to further my education and become an engineer preferably starting in mechanical engineering and i have no idea what to do

@varugas 5 лет назад

Engineato! Meaning PLEASE??

@cralixthegameking4408 6 лет назад

meaning that as the bottom plate is moving minuscule friction is transferred through the Air from the statistics nary plate to the moving one

@cralixthegameking4408 6 лет назад

Meaning that fluids can transfer friction from one object to another

@danconrad920 6 лет назад

cralix thegameking , sure,..have you ever heard of "wind burn"?

@kylehenderson9489 6 лет назад

So Pressure is a measurement/type of Stress. Right?

@keesdekarper 6 лет назад

Pressure is just a force spread out over a surface area.

@JasonT404 6 лет назад

Pressure is a normal stress, yes.

@katjameyer3654 6 лет назад

Shouldn't that video be in crash course physical chemistry?

@___i3ambi126 6 лет назад

So that's turbulent and laminar flow. In-between is transitional flow, but don't worry about that, moving on

@doggy_ebooks 5 лет назад

haha i love being forced to watch these and pretent i managed to learn anything

@pixarfilmz4769 6 лет назад

we live in a society

@bob-jones 6 лет назад

Pixar Filmz NiceMeMe

@pixarfilmz4769 6 лет назад

@@bob-jones Thank you, Bob.

@saiphaneeshk.h.5482 6 лет назад

Awesome

@hannahsummers7956 4 года назад

shes explaining this fairly well, yet i still dont get a word she's saying, both because im american and i dont fully understand her accent and because i am an idiot.

@Weavilepichu 6 лет назад

Is there any kind of physics that Newton doesn't have his hands in?

@xstephanx94 6 лет назад

HER: " YOU THOUGHT I WAS GONNA SAY PARALLEL STRESS, DIDNT YOU? " ME: " YES I DID BABY... YES I DID "

@rajaryan8842 6 лет назад

thank you for help.. i made it through the examination theory part.. all with imagination and your examples😁😁 no puns?😂😂

@theyoutubewizard1126 6 лет назад

Me, an almost *7th* grader: Mmhmmm yep. I actually understand some of this. This is actually pretty interesting.

@theyoutubewizard1126 6 лет назад

Jane Redden that's pretty cool. We are living proof that science is for all ages.

@bevkcan 6 лет назад

im almost born

@sciencepower608 6 лет назад

I am a blastocyst.

@WildEngineering 6 лет назад

im -1/12

@klinky 6 лет назад

I am almost a 27th grader

@nikolasmacdonald 6 лет назад

Crash Course Geology!

@universaleliteinc.6554 6 лет назад

“Lit” as the kids would say!

@tommysalami6301 6 лет назад

Sorry to anyone who has to take this class. I’ve already done so.

@concheemsnon664 6 лет назад

Hi there. So what is your result? Did you pass the course. Im going to take this class so Im a little bit cocerned . :)

@tommysalami6301 6 лет назад

Phát Phạm Hồng not hard until you begin learning about boundary layers and invicid fluids.

@concheemsnon664 6 лет назад

Thanks a lot XD . I'll keep that in mind.

@shizzashaikh2795 6 лет назад

Is pressure and stress the same thing? Their formula is same

@salmanhaidr 5 лет назад

Both of them exists at the same place. But the phenomenon is completely different.

@salmanhaidr 5 лет назад

Pressure is always compressive and perpendicular which is not in the case of stress

@glitchtastic759 6 лет назад

8 mil subs, 180 views 5 comments

@SunriseFireberry 6 лет назад

Why turbulence?

@JasonT404 6 лет назад

chaos man. entropy. heat death is coming for us all.

@SunriseFireberry 6 лет назад

Matter & energy can interchange but can they be created or destroyed? Do we know this answer & if we do, how do we know it?

@lupin7559 6 лет назад

Anyone else reminded of Rakshata from Code Geass?

@keesdekarper 6 лет назад

Why?

@lupin7559 6 лет назад

An engineer with similar character design.

@TheResidentPsycho 6 лет назад

Definitely, Rakshata Chawla who has beaten Earl Lloyd Asplund to creating energy wings

@phenomenalphysics3548 5 лет назад

Oh I was more interested in the Captain Marvel trailer that was played before the video!😂

@Cstank5 6 лет назад

Slow down good damnnnnnn

@dimple0814 5 лет назад

Oooow.. So that's why Japan's bullet train was designed like that. Making it faster.

@Nemoticon 6 лет назад

Huh?

@TheMASTERshadows 6 лет назад

MKBHD

@savvapouroullis7927 6 лет назад

Very nice lesson! Has anyone noticed how amazing and (scuse me) beautiful Shini is? 10/10 would take out for coffee and discuss research projects

@gappythegoat5397 4 года назад

2020 anybody

@toasted_.coconut 6 лет назад

I know I should be paying attention and learning something, but gosh she is beautiful.

@AndysMusicPod 5 лет назад

Bad people

@mahendraify 5 лет назад

Physics girl is cute but u r more articulate.

@et496 5 лет назад

*_flu_* ids

@hannahsummers7956 4 года назад

you have a stunning face. just sayin.

@garmanjow 5 лет назад

I like men

@leslieavighna3380 5 лет назад

I'm so confused.... 😕

@borg286 6 лет назад

The quicksand graphic is false due to buoyancy. Please do more vetting of the graphics, and have them work with physics people more.

@Bird_Dog00 6 лет назад

I think it was meant to be a little jab at how fictional media portray quicksand, not an acurate description of how quicksand works. But yea, unless adressed in a later episode, it could cement false notions in some viewers.

@xstephanx94 6 лет назад

EVERYTIME I SEE HER POST A NEW VIDEO, I START SWEATING 💦

@IraqiManChan 6 лет назад

This guy is gross

@PatrickAllenNL 6 лет назад

I prefer non accent english

@I_am_a_cat_ 6 лет назад

This woman... She both annoys me, and attracts me. I... I do not understand these feelings.

@sayuas4293 6 лет назад

Crashcourse could vastly improve their view count if they stopped this identity politics garbage and let someone host the show who is actually charismatic and entertaining to watch rather than someone who lets them feel good about themselves because they're fulfilling their PC quota.