1. Eulerian and Lagrangian Descriptions in Fluid Mechanics
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- Опубліковано 27 кві 2011
- This collection of videos was created about half a century ago to explain fluid mechanics in an accessible way for undergraduate engineering and physics students. I find that no other series of videos has explained the basics of fluid mechanics better than this one by the National Committee for Fluid Mechanics (those national committees gotta be good for something...)
As such, I have uploaded these videos here for the benefit of students and interested laypersons. I do not own the copyright and these videos were not made by me. If anyone should want me to take them down, I will comply without complaint.
If you want scans of the printed notes that go along with these videos, check out them out over at the MIT side of things: web.mit.edu/hml/notes.html. They are really great stuff. - Наука та технологія
3blue1brown from the 50's
Best explanation in UA-cam for the most important topic of fluid Dynamics Thanks buddy for uploading. Finding Mechanical engineering stuff in YT is being difficult but anyway I got a good one finally.
Even though the video being old and of old technology the richness in explanation is ahead of time. beautifully explained
Thank you so much for uploading this video, the difference so much clearer now.
Thank you for not allowing these to be lost!
I think I can tell the difference of Eulerian and Lagrangian descriptions now, which really helps me a lot in my fluid mechanics class
Thank you so much! Many hours of my life had saved if there have been this in my young ages.
Old, yet amazing.
Even taking in consideration that I'm Danish and therefore don't have much insight in the English therms used in physics I found this very helpful for my high school report.
So thanks for uploading this great video :)
The descriptions of materials derivative are just brilliant.
no words to thank you.........
***** Sorry I mean to say that ,this videos are so good that just saying thank you is not enough.
Thank you for posting this video, Mr. Belmont! I love these older educational films. I Saw another older film on the [mechanical] differential and it, too, was nothing short of teaching perfection! Please keep posting these wonderful little gems from the "Golden Age" of education
Please suggest the name to me as well
@@theawantikamishra +1
let me know if you find it
Thanks very much! It really helps me understand differences between Lagarangian and Eulerian description much better!
It was very helpful. Thanks Mr.Belmont
As so many others if like to thank you for uploading this, great stuff, greets from Sweden!
Thanks so, so much for uploading! =)
This video series is really gonna help me in my thesis! Thanks loads for uploading them :)
speak kazakh, because im from KAZAKHSTAN
Тэмээ
Very good and informative content. Thank you!
thank you very much :) italian students of chemical engineering study too much theory, this video helps me a lot to understand better
thank you very much. very useful resource explained and elaborated in an excellent way.
best explanation so far available on youtube 👏
This is incredibly awesome.
Thanks very much Baary Belmont
my teacher told us to see this video ,it's awesome !!!
@Derek Harrision: Grateful for your response. I figured out how to play all the videos in the NSF series, but streaming them consecutively from Google servers (paying attention to audio-only) on my Android (Verizon-3G) between Albany and Binghamton - during a 2.5 hour drive - is problematic. Consequently, I've become even more of an NPR junkie! :) A simple "books-on-tape" (local MP3) playback is likely my best solution? Thanks again. Sincerely, - Larry / Clifton Park, New York
Thank you so much, Mr Belmont.
Muharrem incenin Maltepe mitingi
This is the most important vídeo that i ever seen in all UA-cam
Very nice explaination. Thank you very much.
Excellent video! Taking a grad MSME fluid dynamics course at the moment (SUNY Binghamton), and professor Lumley's video is a perfect supplement to my in-class work. Where do I find more videos in this fluid-dynamics series? Grateful in Albany, New York. - Larry
OMG now that is a well explained video!
Can you suggest some other links to similar type videos on other topics of Mechanical Engineering.. and thank you for these videos!
Thank you bro. it was so helpful for me
I just can't get it!
really helpful
nice simulation .thanks for uploading
I want that microphone so bad! Sadly I did not live in that time, but the voices sound so cool.
Everyone sounds the same though 😂😂
@@Raj-ts8lw Thats true :D
Always amazing. Thanks.
Perfectly explained
thank u for uploading...
Thanks for uploading this! :p
can u convert euler to lagrange? if given a velocity vector field can we find the velocity vector?
@BarryJBelmont how can i get the notes for this vedio?..thanx for the upload
This is such a high quality content, too bad most stuff you find in schools/onlines are so badly presented that people who need or are interested in such things cannot learn a damn thing =(
SPEAK RUSSIAN! i cant understand your speach
Old but GOLD :) awesome
Thanks for posting these excellent videos. Do you know where higher resolution copies can be found?
These videos are available at twice the resolution on an MIT web site: web.mit.edu/hml/ncfmf.html
Thanks a lot!
the radiation example makes this extremely clear
do ya have same for other engineering subjects as well?
Can anyone please explain at 09:36 how both lagrangian and eulerian description are identical
Simple and clear
Thank you thank you thank you!!
thanks mate good stuff!
9:47 Why are the Eulerian and Lagrangian velocities same in spite of the parcel's circular trajectory? I mean both points are under different parts of the travelling wave, so should have different velocity direction and magnitude based on the local pressure gradient.
Thank you very, very much
Thank you so much! 🙏🏻
What computer did they use here?
I dont understand that one bit
Thank you. Unfortunately, the timing between audio and video is off after about 18:00 by maybe 10 seconds...
Yeah the video lags behind the audio right?
21:05
How does the Eulerian vector at a point change with time if the velocity of the flow is constant at that particular point. I know the velocity is not constant for that same particle of fluid, but I thought Eulerian vectors represent a fixed point, not a moving particle. If so, how could the Eulerian vector change?
An explanation would be most appreciated.
why do u ask this? Does the video mention that ?
he is explaining how the lagrangian vector changes
Because for this example, the flow is now changing with respect to time at a specific laboratory point, as well as spatially. So the velocity is not constant for this case you speak of.
See, the particle or the material, is a radioactive element that is decaying.
The flow is now assumed to be unsteady and non uniform, so the radioactive intensity at point A reduces with time( first particle at A has intensity a1 and a second particle at A too has reduced it's intensity to a2 due to the fact that the particle's radioactivity is reducing due to a unsteady behaviour, so the point A, which is Eulerian or laboratory, is measuring the intensity which not constant with time ) as well as with distance or space ( as the first particle reaches point B, Eulerian or laboratory at right, the intensity has reduced to b1 along it's path, since it reduces intensity while moving a certain distance, due to the fact that it is non uniform, and uniform means constant at any location. When second particle reaches B, its intensity is b2, which is less than b1, because of unsteadiness, so the points A and B record reducing intensities with respect to time).
And this time is the time instants of first and second particle being different.
cours de mécaflu clareté fois Mille ! (fluid kinematic lesson intelligiblility time thousand!) merci et bravo !
واضح ومفيد جدا.
thank you!
Well I must admit that this isn't stuff you'd normally learn in the Danish high school.
It was for a very special report :)
the delay at the end makes it hard to understand
Thanks a lot, it reminds brilliant Soviet educational movies. Regards from Russia.
有物理系的本科生吗
Brilliant. Summary 24:22
ahhh i seee around 18.30 brilliant
That's numberwang!
Rodi's fluids class where you at
Eulerian @7:00
虽然是英语但是听的醍醐灌顶，比我们老师虽然是汉语，但是降低迷迷糊糊好多了
these videos are great
075 mechanical
滿滿的年代感
Epic
May Allah bless you ☺️
Vim pelo MESalva!, 2022
Prof Gwak brought me here 📖
anyone in 2020?
When you're a psu student tryna understand wtf these two are and you accidentally pull up a psu video
this is great content, but why the hell is this the only visual fluid videos available? like i don't even think my professors know what the shit they're teaching in the textbook means or represents, everything is just a simulation. Why the hell doesn't anyone still do stuff like this anymore to actually teach people something
physical fluid simulation takes time and resources. So most of the simulation is done on computers. But concepts like this are very hard to simulate on computer for the average professor and requires deep simulation knowledge. So they leave it altogether.
Video is lagging behind the AUDIO.
Due to this, everything is getting confused.
This is an interesting concept explained neatly, is just made difficult to understand due to the lagging.
Obviously the Lagrangian point feels all the pressure changes Were the Eulerian point just feels the pressure at that point But the Eulerian point also notes the added pressure of being fixed in the flow of the medium
J.B ke classroom link se Jo Aaye Hain
thoko like
Alo Paiva
Great videos, but not a fan of this particular video. I think it is just over complicating an otherwise simple concept. Basically it all boils down to what frame of reference you are talking about. Also, without going through the mathematical derivation using chain rule, one can never fully understand where the convective (v.grad)() term comes from. In fact you can extend this beyond just traveling with the fluid velocity, you can describe a rate when observer travels with any velocity v_frame (Galilean transformation ).
@369malign
@Derek Harrision: Grateful for your response. I figured out how to play all the videos in the NSF series, but streaming them consecutively from Google servers (paying attention to audio-only) on my Android (Verizon-3G) between Albany and Binghamton - during a 2.5 hour drive - is problematic. Consequently, I've become even more of an NPR junkie! :) A simple "books-on-tape" (local MP3) playback is likely my best solution? Thanks again. Sincerely, - Larry / Clifton Park, New York