What is this? Proper camera work that actually shows what the professor is doing? Slow and detailed explanations of the work being done? What kind of online teaching are you running here? It's amazing!!!
No one teaches fluid mechanics better than you sir! I'm so grateful for all the effort you and your team are putting for all students. I have learned more from these videos than I have ever learned in class! THANK YOU !!
Do you use the term "Hydraulic gradient line" as the sum of the height, pressure and velocity heads? I'm a bit confused because in my country they use "Energy Line" for the sum of the 3 heads and "Hydraulic gradient line" for just Z + P/gamma heads
Has anyone determined why the kinematic viscosity of water is listed as 10^-5? Shouldn't it be 1.12*10^-6 , as stated in the same textbook that Dr. Biddle is referring to? By the way, I've been thoroughly enjoying all the lectures here. Thank you so much!
If you know the pipe material (e.g., plastic, copper, etc.) you can look up typical roughness values for new pipes online or in textbooks. There is a lot of uncertainty in those values though, and they are only valid for new pipes.
@@CPPMechEngTutorials thanks for the reply! the real issue would be that the roughness for the material involved falls between 0.3 and 3, so probably the right question would be, how do i know which value within that range should i choose? Thanks in advance
@@carlosnoriega7296The reality is that you only have a crude estimate for the roughness value. Select some typical value (maybe the average value in the range), and make sure you understand how your calculations change as the roughness changes.
1.Why we take atleast 10% head rise to shut off for parallel operating pumps ?? 2. What is preferable head rise to shut off for single opearting pump ??
Chegg account? Just copy/paste question into google, chegg is usually the first link. Or PDF of solutions manual? Never straight copy because you'll fail your tests, but if you're stuck or just checking to make sure you got the correct answer, Chegg is definitely useful.
What is this? Proper camera work that actually shows what the professor is doing? Slow and detailed explanations of the work being done? What kind of online teaching are you running here? It's amazing!!!
you're the best professor for fluid mechanics that I've ever seen, this course is insanely hard but you made it easy , God bless you
Thanks!
No one teaches fluid mechanics better than you sir! I'm so grateful for all the effort you and your team are putting for all students. I have learned more from these videos than I have ever learned in class! THANK YOU !!
ruclips.net/video/gn4JMIwDzp8/видео.html
Watch nptel videos by sk som and chakraborty
@47:24 when calculating v1 you should get 4.095 ft/sec with the current guesses/equation plugged in and q1 should be 1.43ft^3/s
Thank you(Dr. John Biddle with staffs) for your great lecture.
You're welcome!
You are great Dr. john biddle.....rarely seen such amazing masters.....i love you😗
These videos help me a lot!Thanks.
No problem.
a very good video it is very interesting thank you love from india
You're welcome... from California.
you are amazing thank you
The velocity at B which is found from guess friction factor will give you the same friction factor after finding the Re from that Velocity at B.
THANK YOU!! so much!
Where did 1x10^-5 come from at 13:30?
for the pipe roughness it is .005
Highly appreciated effort,thanks a lot
But why did we suppose that ha= hb? Are the identical?
ruclips.net/video/gn4JMIwDzp8/видео.html
Do you use the term "Hydraulic gradient line" as the sum of the height, pressure and velocity heads? I'm a bit confused because in my country they use "Energy Line" for the sum of the 3 heads and "Hydraulic gradient line" for just Z + P/gamma heads
Has anyone determined why the kinematic viscosity of water is listed as 10^-5? Shouldn't it be 1.12*10^-6 , as stated in the same textbook that Dr. Biddle is referring to?
By the way, I've been thoroughly enjoying all the lectures here. Thank you so much!
It's about units. If you use SI unit systems, it is 10^-5, and it is 1.12*10^-6 in british system.
@@Omer-tx3zx no it's not. It should be around 1*10^-6 m^2/s (in SI unit)
Can someone enlighten me on how he's finding Nu to be 1x10^-5?
Is it just a constant or am I missing something?
Its consistent value of viscosity i think
Its constant
hello professor, i'm quite curious as how Vj is too small that it can be neglected?
great.thanks😉
how to find the pressure loss along the pipe
hi proffesor. if we don't know the pipe roughness how can we solve this type of problems?
If you know the pipe material (e.g., plastic, copper, etc.) you can look up typical roughness values for new pipes online or in textbooks. There is a lot of uncertainty in those values though, and they are only valid for new pipes.
@@CPPMechEngTutorials thanks for the reply! the real issue would be that the roughness for the material involved falls between 0.3 and 3, so probably the right question would be, how do i know which value within that range should i choose? Thanks in advance
@@carlosnoriega7296The reality is that you only have a crude estimate for the roughness value. Select some typical value (maybe the average value in the range), and make sure you understand how your calculations change as the roughness changes.
@@CPPMechEngTutorials that seems a good approach. So ill do that, thank you!
1.Why we take atleast 10% head rise to shut off for parallel operating pumps ??
2. What is preferable head rise to shut off for single opearting pump ??
Why do we need to go back to get the new friction factor at the end? Aint we already got Q1, Q2, and Q3?
I get paid but I've never gone this far lol
We need homework solution.pdf.
We will not be providing homework solutions. Sorry.
Chegg account? Just copy/paste question into google, chegg is usually the first link. Or PDF of solutions manual? Never straight copy because you'll fail your tests, but if you're stuck or just checking to make sure you got the correct answer, Chegg is definitely useful.
This is so basic...
ruclips.net/video/gn4JMIwDzp8/видео.html