Physics 34 Fluid Dynamics (1 of 24) Viscosity & Fluid Flow: Introduction

In this video I will introduce viscosity and fluid flow involving frictional forces between the molecules and the containing walls.

Next video in this series can be seen at:

[zj]

Great job!!!
“If you can't explain it to a six year old, you don't understand it yourself.”
― Albert Einstein

[muhtasimittisaf]

Sir this may seem a bit silly but what is reason behind the change of velocity in the different layers of water ?

[iaincrawford]

Great lecture! wll presented, easy to understand!

[alisawi]

I have done with my physics courses but I miss listening to your teaching style!

[mindmysteries]

you are the great teacher i've ever met!

[flamer]

very good explanation. pen drop included! easy to follow. ty for this :)
your voice is nice to listen to and one can feel the enthusiasm you are teaching this.

[superbroolyy]

waw amazing explanation thank you very much

[alexandriaalles]

Aw! Love these and your bow tie! Thanks for the educational tutorial :)

[miraj_sippy]

You are exatly revising my this concept which my teacher taught me in class. great sir

Modifications in physics i always like

[Zahnpuppy]

you sound kinda like Gru. from despicable me.

[EternusVia]

I don't understand why different velocities implies different pressures. Could someone explain that portion to me?

At time 1:21 Mr. Biezen goes from explaining the effect of viscosity on velocity to the implication that pressure is greater to the right than to the left. I don't follow... :(

[ahmedal-ebrashy]

This list of complete correct? It is just not numbered correctly. Am I right?....I loved the practical application at the end.

[nasseer]

minute 4:30, I don't understand where you got the (1/0.9R)^4

[henriklundin]

Hi, thanks for these videos, very helpful. I think that you could have made the last part that stars around 4:20 a bit less complex. Maybe writing. "u"L(1/(0, 9R))^4= "u"L/R^4*1, 524=(P_0)1, 524. Do not know how to write special signs in youtube comments, sorry.

[tolgahan]

hi thanks for your help, there is a question; why didnt we accept that pressure is being less in bernoulli's equations? is that changing too small to consider?

[DG-wjpk]

Please explain why are we using friction (Mu) coefficient when we are in fluid dynamics? I think viscosity (Eta) is the right use. I love your videos.

[rahultiwari]

Sir there are so many layers in a laminar flow and I have read that on the application of force the liquid starts flowing and the frictional forces (viscosity) starts acting between the layers, so my question is among which layer the resultant viscosity is developed and which type of force is required to make the liquid flow like while writing F=eta×dv/dx × area which force is it - viscous force or the applied force and which area is it I mean is it cross sectional area of the pipe or something. Please tell.

[justinfoto]

Hi Professor Biezen, thank you again for these excellent videos. My question is: is the no-slip condition at the walls due to the adhesion being greater than cohesion? And if so, does this mean mercury flow through a pipe shouldn't be evaluated with the no-slip condition?

[medtabernoust]

hey Mr michel hope u are fine thank u so much for every video u uploaded on ur channel i understood a lot of thing with u ; please i request u if u can do some video on Finite element method cause they are very very important for engineering to solve equation numerically

[tommytiasing]

sir what if the R remains constant from the entrance towards the end of pipe?