Fluid Mechanics: Laminar & Turbulent Pipe Flow, The Moody Diagram (17 of 34)

0:00:10 - Revisiting velocity profile of fully-developed laminar flows, Poiseuille's law.
0:03:07 - Head loss of fully-developed laminar flows in straight pipes, Darcy friction factor
0:08:30 - Major and minor losses in the conservation of energy equation
0:11:53 - Example: Pressure drop in horizontal straight pipe with fully-developed laminar flow
0:18:24 - Friction factor for fully-developed turbulent flows in straight pipes, Moody diagram
0:41:20 - Friction factor for fully-developed turbulent flows in straight pipes, Haaland equation
0:46:02 - Use of Moody diagram for different pipe materials, fluids, flowrates, and other parameters
Want to see more mechanical engineering instructional videos? Visit the Cal Poly Pomona Mechanical Engineering Department's video library, ME Online: www.cpp.edu/meonline
This lecture series was recorded live at Cal Poly Pomona during Fall 2014. The textbook is Munson et al., "Fundamentals of Fluid Mechanics (7th edition)."

[@thegoodkidboy7726]

Textbook is incomprehensible. Thank you so much.

[@adamjacobmoro4657]

This is so clear and practical! I'm currently taking fluids at UCI and we've only gone over the derivations, these concepts are only explained from a mathematical standpoint. Thank you so much for making connections between the formulas and the physical systems they represent, this is wonderful.

[@CPPMechEngTutorials]

Glad the videos are helping. In every fluid mechanics course, there is limited time in the classroom. Often a tough choice has to be made about whether to focus on derivations or sacrifice some derivations for examples. Both have potential advantages and disadvantages.

[@gobletoffire75]

Papamoschou?

[@The04prasanga]

What an amazing professor he is. The best fluid mechanics lessons I ever had

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Can't tell you how much I appreciate these lectures

[@aaranan.s8419]

This is an excellent video. It explains fluid mechanics very clearly. Thank you so much, professor!!!

[@delacruzemilyjoycee.1748]

Thank you so much, sir. I enjoy watching your lectures during this pandemic. You make the subject easier to understand and more enjoyable.

[@rawanxy7396]

he's amazing omg I feel so sad for myself our professor is nothing like him it feels like I am learning Fluids all over again:( please keep downloading his lectures thanks

[@brandonlawrence5851]

Man, the puzzle pieces just fall together so perfectly after an afternoon of complete bafflement. When I first saw the Colebrook formula two hours ago I kind of wanted to die, but now I actually get what it's made of, and the motivation for why it's useful. Fluid Mechanics is one beautiful b*tch of a subject, that's for sure. Can't thank you enough for putting this out there guys, this is world-class.

[@zacharydavis4398]

Thank you for spending the time to create this content. Much appreciated.

[@diveintoengineering6089]

Thank you Prof. Biddle. You are a great educator. Best wishes from Chile.

[@Anonymous-yz4sm]

you're a legend prof., THANKS FROM LEBANON

[@rominac4242]

Thank you so much for all your lessons. They've helped me understand everything so much better!! SO GRATEFUL for your lectures!!

[@CPPMechEngTutorials]

We're glad they are helping people both at CPP and beyond.

[@jichenliu3899]

Absolutely amazing teaching skill, thank you so much. Much much much better than our teacher. There is even nothing better than being a student of such a wonderful teacher.

[@CPPMechEngTutorials]

We like him too.

[@muhammadafifhidayat2566]

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[@nosiphoshezi5613]

best teacher ever, thanks

[@emmanuelsansusthytardio5835]

What an amazing professor! Thank you so much! God bless you Sir!

[@CPPMechEngTutorials]

Thanks!

[@mehdi.sajadi]

you helped me a lot man, God bless you 🙏

[@sampyhardin6689]

Awesome professor.

[@AceofDlamonds]

excellent! enjoyed this section

[@TimelessLegendsTV]

Sir if the water going upward in pipe due to pump so what will be it's velocity profile.

[@rtrt2889]

Great lecture!

[@haicraft9480]

Great explanation. Well done professor.

[@CPPMechEngTutorials]

You're welcome.

[@user-cs5jk5cv4i]

live easy with this prof

[@derrick8044]

9:00 Energy Eqn 10:07 its called head form bc every term in the eqn has units of feets or meters 11:23 13:31 !!! 20:44 turbulent flow analogy 23:13 moody diagram 29:15 moody diagram(log-log) for turbulent flow. Copper & PVC pipe are approx smooth pipe = smol no. of roughness factor (epsilon) 29:42 how to get friction factor of turbulent flow using the moody diagram 36:06 how to read log scale

[@bernardomacieira1601]

Thank you so much for this!

[@CPPMechEngTutorials]

Our pleasure.

[@mertgok9908]

thank you so much sir, if i pass the exam, it'll cause of you, thanks lot..

[@CPPMechEngTutorials]

Good luck!

[@othmanadel]

very well explained and very good job

[@CPPMechEngTutorials]

Thanks!

[@user-ve8rm5lw4r]

Can ansser that plase👉The losses per unit length pipeAh/l in turbulent flow through small pipe depend upon Velocity, Diameter, Gravity, Dynamic viscosity and Density. Determine the general from of equation.

[@earthcinema8912]

wow sir you are amaizing..

[@aldrinadriano8036]

Bestt so far

[@kravindar]

Very good video. Thank you sir !

[@CPPMechEngTutorials]

You're welcome.

[@rache1sc123]

Thank you so much for sharing!

[@CPPMechEngTutorials]

You're welcome!

[@DevonMarks]

Great video thank

[@byebrows9698]

I have a question if you could answer for me. Turbulent flow breaks many of the assumptions in Bernoulli’s equation and hence Bernoulli’s cannot be applied to turbulent flow. How come you’re using Bernoulli’s here for turbulent flow case?

[@eng.fatima3066]

thanks 🙏🏻🙂

[@akram4139]

Thanks very much, very helpful

[@CPPMechEngTutorials]

Great!

[@Oswald]

thank u! very useful

[@SaraKhan-uz1vc]

the 16 people who disliked this are the professors who sucks at explaining things including my fluids professor

[@JohnSmith-fo8tn]

if given Re, kinematic viscosity and D, and asked to find mean velocity, would it be right to find V and then multiply by 0.5 for mean velocity? or in other words is Vc the same as the V used in these equations? thanks

[@CPPMechEngTutorials]

The V in the Reynolds number is the average velocity across a pipe cross section. If the flow is laminar, Vavg = 0.5 Vc.

[@MD-lk4qr]

amazing.. very well explained!!

[@CPPMechEngTutorials]

Glad it helped.

[@MD-lk4qr]

it did help, i just got my result todaymorning and im happy.. thanks again!!!

[@CPPMechEngTutorials]

Hooray!

[@CPPMechEngTutorials]

Awesome!

[@shradhasaini]

Sir, I am not clear of the term 'ht' .. can you please explain it. (9:52/51.34 in video)

[@CPPMechEngTutorials]

hT = head reduction due to a turbine

[@engineergopinath]

Thank you sir..

[@CPPMechEngTutorials]

You're welcome

[@pepefrogic3034]

Great

[@fredbrunn5359]

he is awesome!!!

[@CPPMechEngTutorials]

Agreed!!!

[@osmanharundundar3069]

Why do we divede Presure difference by dynamic pressure and what is the purpose of it ? Basically could we find delta p by using average velocity ?

[@CPPMechEngTutorials]

Can you provide a timestamp?

[@osmanharundundar3069]

3:20 around 5 sec

[@CPPMechEngTutorials]

It gets the equation into a more convenient form. You are always allowed to divide an equation by whatever variables you wish.

[@osmanharundundar3069]

What do you mean by saying a more convenient form .Thats the the point i dont get , By the way i appriciate your fast reactions :D

[@CPPMechEngTutorials]

The formula f (L/D) V^2/2g is a very common formula for determining the head loss. It allows us to place the equation in the conservation of energy equation.

[@sangenayub3338]

you are abest thanks

[@JudyAbbott494]

He rocks!

[@CPPMechEngTutorials]

Yes, he does.

[@habibahmed5140]

do these videos cover whole course of fluid mechanics _?

[@CPPMechEngTutorials]

The 34 lectures cover all the the topics in a typical mechanical engineering fluid mechanics course. Other disciplines may cover other topics. For example, civil engineering fluid mechanics courses would discuss open channel flow.

[@preadp1]

Do you also cover Non-Newtonian flow in pipe, where the expression become much more complex for laminar flow, and much harder for turbulence flow.

[@CPPMechEngTutorials]

Just Newtonian flow. Fortunately, many flows in everyday life are Newtonian.

[@preadp1]

You have not dealt with non-settling slurries in pipes, where Non-Newtonian flow in pipes is always guarantee. The pumping of such material also becomes challenging, as the solids presence has an effect of promoting and supressing turbulence often at the same time.

[@CPPMechEngTutorials]

That topic is definitely beyond the scope of an undergrad fluid mechanics course. :)

[@adibasdas]

he must declare his prophecy. thanks for the upload :)

[@CPPMechEngTutorials]

He is far too humble for that.

[@SuperGamerYoBros]

What about a head loss due to a nozzle?

[@CPPMechEngTutorials]

The head loss of a well-designed nozzle (where the flow is accelerated smoothly and flow separation is avoided) is relatively small.

[@SuperGamerYoBros]

Awesome thanks for the swift reply.