Thank you professor. I hadnt understood this lecture in my mother language in my university but i could understand everything in english thanks to you today. :)
In my degree program I'm studying oceanography and we've now delved into the Navier-Stokes equations as well as the Reynolds number. This video has been incredibly helpful; the professor's explanation was very clear, especially considering that my native language is italian. Thanks.
If only I had Dr. Biddle for this class. Our Professor struggles with trigonometry so you can imagine how she is as a Fluid Mechanics Professor. Regardless, these videos are the sole reason I might pull a B in this class. This man is a saint!
34:36 once flow is fully developed it will remain fully developed even when u add a valve 41:01 pressures are compressive stresses, they always point into the fluid CV 45:00 50:2752:40
At 47:26 why does u = 0 when the inner radius is equal to the diameter/2 ? My understanding was that at D/2 we were at the centerline where we would have u_max
Thank you professor for the excellent lecture on viscous flow in pipes. @52.44 the flow rate is mentioned as Q= (piR^2Vc)/2. I am wondering if you could show how the whole term is getting divided by 2. Once again thank you for your valuable time.
In the video the value of Re at @30:00 is 6369.44, which is greater than 4000. (i think you are confusing the " , " by a " . " ) Side note: Reynold's number is the ratio of inertial forces to viscous forces. When Re is small, viscous forces supress the inertial forces. When Re is greater, inertial forces are more than viscous forces, and thus the chaos. Reynold experimentally came up with the expression of Reynold's number. In doing so, he assumed some of the factors that affect laminar to turbulent transition to be insignificant. Some of those factors are surface roughness, pipe vibrations and fluctuations in upstream. These parameters are carefully manipulated in fluid mechanics labs to even get laminar flow at Re=1000. Also this 2100- 4000 transition range is only accurate for Circular pipe flow.
That is question for a thermodynamics or heat transfer course. Fortunately, we will be uploading an entire lecture series for both courses in the next couple months.
Dear sir, why an engineer is forced to tell what must the entrance length for the piper for laminar and turbulent flow, what he(engineer) is going to do with that length ?what must be the reason ?
So if you have a turbulent flow is the profile of the flow before the "entrance length" just some developing profile. Neither turbulent or uniform? I thought only parabolic profiles could be called fully developed.
the last part is mundane to work out the average velocity for laminar flow. it is so obvious that average velocity is 0.5 of center line velocity at 5mins b4 end of lecture without going through all the mathematical substitution.
This would have been a most useful lecture if Prof. Biddle wasn't changing the results, (reversing them), after his explanations, (for example, @24.00, is the flow at the end of the entrance region now laminar or turbulent)! The use of prepared slides could have eliminated much of the time he spent copying equations from his lecture notes onto the blackboard. Obviously, John Biddle knows this subject; but, he could do better with some audio-visual aids. Also, why not record a lecture without a class of students to interrupt him, to walk past him, and to make distracting noises? Too busy to make a really good video lecture? I was intrigued, at first, by a lecturer who wasn't regurgitating the textbook's lesson, then was disappointed; with this classroom's distractive behaviours, I certainly would have dropped out of this course; and, I won't bother with the other "tutorials" in this series, (which could have been better staged and edited).
lmao dude shut the fuck up. I've never read a more whiny comment about something that was 1) done well and 2) not even bad. Are every single one of your classes private? Do you think this professor isn't busy being ya know... a professor? Follow and learn and just pause where you need to, it's a video...
This gentleman, next to being extremely knowledgeable in his field, is a natural educator.
2:16 who started COC
its amazing how clearly he breaks complicated concepts down to make them understandable. wish my fluids prof taught like this!
There can be only one Prof. Biddle.
Prof, your handwriting is superb.
After searching whole youtube..finally found the best professor...THANKSS!!
Thank you professor. I hadnt understood this lecture in my mother language in my university but i could understand everything in english thanks to you today. :)
Terrific!
Rahmi mezun oldun mu rahmi :D
In my degree program I'm studying oceanography and we've now delved into the Navier-Stokes equations as well as the Reynolds number. This video has been incredibly helpful; the professor's explanation was very clear, especially considering that my native language is italian. Thanks.
cant believe i paid thousands for uni only to end up watching lecture on youtube. BTW MY FLUID TEST IS TMR!!
Awwwwn
Bro I’m in the same boat rn
@@caiuspollard3843 all the best bro. Update: i passed my test
If only I had Dr. Biddle for this class. Our Professor struggles with trigonometry so you can imagine how she is as a Fluid Mechanics Professor. Regardless, these videos are the sole reason I might pull a B in this class. This man is a saint!
34:36 once flow is fully developed it will remain fully developed even when u add a valve
41:01 pressures are compressive stresses, they always point into the fluid CV
45:00
50:27 52:40
Fluids make so much more sense now. Thank you Dr. Biddle!!
Thanks for posting. I took professor Biddles Fluid Mechanics II course at CPP and this brought back good memories.
We plan on recording Fluids II next quarter. The videos probably will be on this channel by Summer 2018.
writing from turkey. i am very grateful to you. thanks.
By far the best and the easiest to comprehend
Definitely one of our best professors.
wow this class is too mature, how did nobody laugh at 28:12
HAHAHAH I WOULD'VE LAUGHED, i saw this comment and far out man, why do teachers always pull this shit
Are you just going to ignore "Uhh, Where's the 'D'?" at 21:18?
I totally saw that too
for me it was 50:41, the smile before and after the sentence
You are a great proffessor!
You saved my time.thankyou so much
At 47:26 why does u = 0 when the inner radius is equal to the diameter/2 ? My understanding was that at D/2 we were at the centerline where we would have u_max
wish i had a prof like you T_T thank you for a great lecture
You're welcome.
2:15 someones loading up clash of clans
i heard it in another lecture as well, this guy
@@iRul3TheSky1995 bro. Tf no one playing coc
yeah i noticed that xD
One of the best professors ever! But that asside, who plays games and eats chips in class?
Thank you from Iraq. You are better than many of my foolish teachers
You're welcome!
이것은 또 하나의 궁금증이었습니다. 물을 생각한다면 물의 점성은 크게 높지 않은 편이지만 분명 점성이 높은 유체도 우리는 그 흐름을 예측할 수 있어야한다고 생각했었습니다. 그 흐름을 예측하는 방법에 대해서 잘 설명해주셨습니다.
Finally, I can calculate the length my pipe has to be for ejecting laminar loads
can't believe i found this guy 2 hours before my final
did i hear a clash of clan intro sound "2:17 minute"
Thanks prof ....your the best teacher
Thanks!
Thank you professor for the excellent lecture on viscous flow in pipes. @52.44 the flow rate is mentioned as Q= (piR^2Vc)/2. I am wondering if you could show how the whole term is getting divided by 2. Once again thank you for your valuable time.
The best lecture
It is a pretty good one.
Ooh my you explain so well, thank you so much!!!
You're welcome!
Best Prof. Love your lectures Sirji.
Thanks!
thank you for the lecture professor! :)
You're welcome!
the best professor
Perfect presentation👌🏻
you're amazing man , thank you very much
thank professor... best lecture
why is the diameter divided on 12 in the examples ? Great lecture thanks
or is that in ft?
To convert from inches to feet, since the velocity is given in ft/s
May I know what textbook is used in this class?
Is anyone playing Clash of Clans 2:16?
could I get the name of the refrence book to follow through.
It's in the caption. Fundamentals of Fluid Mechanics by Manson
He's the Michael Jordan of Fluids!
which university is this?
California State Polytechnic University, Pomona (Cal Poly Pomona)
Is Q the volumetric flow rate?
yes, and m is mass flow rate
you are why I just got an 83 on my fluids exam when the average was 65
That means you owe Dr. Biddle 83-65 = 18 thank you's
2:20 SOMEONE IS PLAYING CLASH OF CLANS!!!!!!!!!!!!!!!!!!!!!!!!
i noticed that too lmfao
At 30:00, the value of the Reynolds number is less than 2100 not more than 4000, which makes it a LAMINAR flow instead of turbulent flow....
In the video the value of Re at @30:00 is 6369.44, which is greater than 4000. (i think you are confusing the " , " by a " . " )
Side note:
Reynold's number is the ratio of inertial forces to viscous forces. When Re is small, viscous forces supress the inertial forces. When Re is greater, inertial forces are more than viscous forces, and thus the chaos.
Reynold experimentally came up with the expression of Reynold's number. In doing so, he assumed some of the factors that affect laminar to turbulent transition to be insignificant. Some of those factors are surface roughness, pipe vibrations and fluctuations in upstream. These parameters are carefully manipulated in fluid mechanics labs to even get laminar flow at Re=1000.
Also this 2100- 4000 transition range is only accurate for Circular pipe flow.
How do we know the kinematic viscosity?
Professor, I want to know how to find Reynold Number when pipe have 2 different area (Vena contracta) @CPPMechEngTutorials
You would have 2 separate reynolds numbers
Sir May you please give the video lecture about, how Reynolds expression for laminar and turbulent flows is derived?
Any fluid mechanics textbook will go into this topic in greater detail.
Yes I agree. I also searched in many textbooks all are typical to me. I am not able to understand those, any textbook suggestions sir?
@@CPPMechEngTutorials i need to join thus school
The textbook is in the video notes.
You are welcome to apply.
sir which fluid is inside of that cup and if there is a coffee of a tea then how it remain hot for such a long time
That is question for a thermodynamics or heat transfer course. Fortunately, we will be uploading an entire lecture series for both courses in the next couple months.
beautiful ans
CPPMechEngTutorials 😂👌
some one playing coc....
Tsk tsk... playing games in class.
Yeah at 2.18
25:00
Dear sir, why an engineer is forced to tell what must the entrance length for the piper for laminar and turbulent flow, what he(engineer) is going to do with that length ?what must be the reason ?
by the way nice efort taken by u sir to teach us
Thanks!
How can i join your school
So if you have a turbulent flow is the profile of the flow before the "entrance length" just some developing profile. Neither turbulent or uniform? I thought only parabolic profiles could be called fully developed.
wow very wonderful .....
Some yone opened clash of clans in the class: anyway I wish we had more professors like Prof.Biddle in my university
29:16 good drawing ;)
AMAZING!!!!!!!
He looks like Ric Flair
Both are great at four-figure leglocks.
does anyone notice the guy in the front has different colored caps in every lecture loll go watch all the playlist
the last part is mundane to work out the average velocity for laminar flow. it is so obvious that average velocity is 0.5 of center line velocity at 5mins b4 end of lecture without going through all the mathematical substitution.
the goat
lol someone playing COC and lady looked back 2;17
Lol COC 😂
28:20 ah my mind is dirty
thank you, now I can't un-see it
the prof who made the most mistakes~
This would have been a most useful lecture if Prof. Biddle wasn't changing the results, (reversing them), after his explanations, (for example, @24.00, is the flow at the end of the entrance region now laminar or turbulent)! The use of prepared slides could have eliminated much of the time he spent copying equations from his lecture notes onto the blackboard. Obviously, John Biddle knows this subject; but, he could do better with some audio-visual aids. Also, why not record a lecture without a class of students to interrupt him, to walk past him, and to make distracting noises? Too busy to make a really good video lecture? I was intrigued, at first, by a lecturer who wasn't regurgitating the textbook's lesson, then was disappointed; with this classroom's distractive behaviours, I certainly would have dropped out of this course; and, I won't bother with the other "tutorials" in this series, (which could have been better staged and edited).
We are doing the best with what little resources we have.
lmao dude shut the fuck up. I've never read a more whiny comment about something that was 1) done well and 2) not even bad. Are every single one of your classes private? Do you think this professor isn't busy being ya know... a professor? Follow and learn and just pause where you need to, it's a video...
You are so entitled. Get a life
Are you for real?
lmao honestly if you think this class is distracting you can not attend any uni. lil bitch bitch