Fluid Mechanics - Viscosity

[adzidowo007]

 well done

[ATERIFA]

omg i now understand why the cornflower thing works. Great help and prep before lecture. Thankyou!

[Platemaster]

This is like Bruce Lee talking about Fluid Mechanics, only better.

Be water my friend.

[Mr1991june]

nice lecture, very in depth.

[humairayouth]

Thanks for the lecture. Could you please put serial number of all your lecture series on Fluid Mechanics? e.g. Fluid Mechanics Lec 1, Lec 2….so on.

[maniac92400]

dude...may i ask...the viscoscity of liquids decreases as temperature increase....right?then y is in your video the temperature is high the viscosity constant is also higher....correct me i make a mistake...

[jalexiam]

You should think about being a professor. Your enjoyment makes you easy to listen to and you really helped.

[spunndamm]

woah, your video summed it up. thanks! :]

[Digadogup]

hehe your accent

[morone91]

fluid mechanic is a bitch haha thx for the explanation bro

[anandtakawale]

A very nice video,you are really very enthusiastic person.I have Fm as an undergraduate course in my college and because of you I am getting an interest in this subject.Thank you very much,I appreciate your work,you are good teacher,i will also check all your other Fm videos. :)

[sieruk64]

Hey, good video!

[kimlijin]

very helpful lect =) thank you very much !!

i've understand much much better with your help =) thanks lots

[Padstrolufc]

Thanks for this mate.

Really helpful. 

[jeffryso]

thx you are so passionate and so explain so clear

i can't hear at the end

he says the viscoity is llow,o that's why we ------need a low shearing----- stress?

when we paint a wall the paint ---fix------ in the the wall?

the ---- ---- part is where i can't here well

can someone tell me?

[casperrespac79]

nice to study fm again

[technohunger]

i still dont get it..what are those plates? lol...no seriously

[jacobbis4lovers]

I think it's funny how this guy is asian...asians are smart in everything.

[bmwe30man]

brillant vid dude just passed my exams because of you thanks!

[zobaire12]

man....please talk slower and clearer.

[DoubleDutchBust]

10:50am Sunday (CST) - Time in

Mississippi, United States of America

O you can do it, try real Hard

[bundy241241]

90% of human brains cannot compute fluid dynamics, location, physics and depth perseption

[jamessmedley82]

@bundy241241: and your brain can't compute correct spelling.

[zonerboi22]

the first few minutes were ok... i was happy coz for once i was understanding physics...but then you got carried away and got into your mad scientist character, i was like..wtf?..oh well, i shall go back to wikipedia..

[goltopi22]

dude... u r very fast but you've given very good concept. Do you have any video related to fluid mechanics?

[xsolarwindx]

Very nice, thanks!

[paopaomanalansan]

Non constant or variable???

[thybigballs]

Um....so whats viscosity again? Can I get high if I smoke it?

[Lu1stron]

Man, I love you and I'm not gay!

[crisjunior30]

very usefull

thanx...

[DoubleDutchBust]

Fluid Mechanics - Viscosity

ResserdehteviieceruoydiD

Didyoureceivethedresserdonylee

Uranium

C Do see me more clearly-

Far above expectationsean -

[lankangirlxox]

that was awesome! I'm still in high school and about to a prac on terminal velocity and I was just looking up how I should design my prac and everything but yeah that was awesome, I understood all of it and i'm really not good at physics! You should post more vids to help people like me! lol

[FanGunk]

great job dude

[DesiScientist]

The talk pace is fine....men of science :)

[kyljns]

But how do you activate viscosity?

[DesiScientist]

activate? do you mean how can one vary it?

[mcchuff]

woahh this dude is good! im going into 1st year uni in sept and i even managed to understand that! he conveys it very well, if not a lil quickly -thank god for the pause button-

[rishy1991]

thanks, it sort of helped me

[MRburitz]

he's trying to fit it into the 10 minutes mark.

[muddwell]

you had trouble with it didnt you

[FunkyChiken999]

Actually he's talking about stuff that I learned in the 1st week. Chances are I've taken more FM courses than you. Chopsticks would make alot better videos if he talked much slower. People who have no idea what he's talking about have trouble keeping up with him. Kudos to him for a good command on the subject matter though :)

[RedWalk8]

Talks slightly too fast for me, but interesting!

[avafan0098]

Wait a minute...whats Singlish 0.0

[sirkoBG]

Well done mate, nice tutorial with some minor mistakes, for example liquids decreases viscosity with the increase of temperature. On the graph u showed the oposite(Newtons fluids). I appreciate the enthusiasm though.

[DesiScientist]

On the contarary,....some do

[s3090752]

Pretty good going if you ask me, took basic thermal-fluid sciences 2 years or so ago before moving on to Aerodynamics and such and it was always a favourite :)

Just some criticism, though, thinking only of the notation of the angle 'little b' introduced in the beginning; shouldve called it 'beta' instead (which it is) - it can confused with the distance between plates when listening and separating the notation is always good practice imo..

overall, really good though :)

[jcl424]

Very usefull, I'm begining my Fluids mechanics course at uni, thanks very much, and your english is good!!

[glenbo111]

well done mate cheers

[jawadshuaib]

love it. very helpful. thank you.

[casanovico]

hi dony- appreciate your job, well done (no doubt give you 2 thumbs, 2 toes)

[kegder]

Hi there! Now that's what I call passion ! I am myself a French student specialized in fluid mechanics and energetics, it is very pleasant to find such passionnate fellows ! FM is a beautiful subject indeed ... keep the flame bro, I'm your fan :)

[donylee]

Thanks for your comments. I agree that FM is a beautiful subject. If you wanted to know, I have already completed my first FM course.

The flame will now be shifted to Quantum Mechanics, more of a bizarre subject than beautiful.

[kegder]

Alright man !! I guess u love challenging physics related issues ! keep going, im looking forward to seeing how u will teach that one ! give it ur best shot

[HyperChief117]

@donylee I love quantum mechanics! I'm a person interested in space, astronomy, and astrohpysics. Most of all on how the universe works as a whole in all. You really helped me with my grade 8 unit on fluids, haha you are great thanks.

There is one thing I wanted to ask you and it would help a ton if you answer. What gases have a very high viscosity, and what gases have a lower one. About 6 gases in all if you can name them, it would help alot if you answer ASAP. Thank you :)

[adsjfowe]

oh, my.....my friend, r u nervous? ur singlish makes me homesicked

[donylee]

Really? I dedicated my life to speak proper english and tried to at best eliminate my singlish.

I do believe you are from Singapore and studying overseas right.

[AMIBIHONGO]

Your singlish is horrible

[Cervy18]

@donylee i dont know what that jackass is talking about with "singlish", but you speak very good English

[mukke76]

@donylee "...eliminate my Singlish" What are you talking about?? You speak Hardcore Singlish. Painful to listen to...

[illuzn88]

ur a retard

[lhbgabs07]

hey, great stuff there !

[maudillustration]

Hey,very interesting contribution. Viscosity is such an interesting thing...I'll ceirtanly check out your other videos..Right now I'm working on modeling laminar-turbulent flow transition..hm fluid mechanics is really a fascinating field

Nikola, Serbia

[donylee]

Not a problem. Just Donny doing this thing.

[preadp1]

Hi a good video, some points

Firstly Viscosity is only a concept applicable to Newtonian fluids, as Non-Newtonian fluids (the majority of slurries and complex fluids are) as such does not have a viscosity. We tend to call this the apparent viscosity as it becomes a function of the shear rate. you did not mention that the viscosity may be time dependent that it could be thixotropy or anti-thixtropy. Otherwise good work.

[donylee]

Hey preadp1,

Thanks for your contribution. May I clarify with you on something you said. I believe you meant to say that 'a linear shearing stress and strain relationship' is applicable only to Newtonian fluids.

For Non-Newtonian fluids, yes we use the term apparent viscosity. We can't strictly say that the general concept of viscosity doesn't apply, like you did in your first sentence.

[JEDss454]

I never would have believed it at the time, but I actually kind of miss my ME 310 class at the good ol' U of I. This stuff is still very fascinating to me. Great video and examples. Keep up the great work.

[R3AktoRMacedonia]

Id actualy downloaded all your videos about fluid mechanics,

so how matematician like you get into specific area like fluid mechanics?

[donylee]

I'm just fascinated by how much differential equations are used to modeling such Fluid Mechanics phenomena. As I study more advance topics, PDE and complex numbers become more prominent.

[R3AktoRMacedonia]

Very nice!!!

[donylee]

Hey Macedonia,

I'm glad you found the lecture nice. Didn't knew people thought viscosity as interesting.

[digitalgamsawala]

lol donylee..i hope you did not comment out of frustration..