Heat Transfer (07): Overall heat transfer coefficient, composite geometries examples

Note: At 0:18:13, Lins/Kins should be 1.09 but it does not change the value of q".
0:00:15 - Review of previous lecture
0:01:10 - Example problem: Composite wall
0:04:13 - Overall heat transfer coefficient & the "UA product"
0:08:57 - Example problem: Composite wall in series
0:23:16 - Example problem: Composite wall
0:34:37 - Example problem: Cylindrical composite wall
Note: This Heat Transfer lecture series (recorded in Spring 2020) will eventually replace the earlier Heat Transfer series (recorded in Fall 2015) in a couple years. The old lecture series had some errors and was lower quality.
Want to see more mechanical engineering instructional videos? Visit the Cal Poly Pomona Mechanical Engineering Department's video library, ME Online: www.cpp.edu/meo...
This lecture series was recorded live at Cal Poly Pomona during Spring 2020. The textbook is "Introduction to Heat Transfer" by Bergman et al.

[@danielzhao8340]

it's been a long time to see Professor Biddle again! love his fluid mechanics class

[@danielzhao8340]

3 Y

[@vicentereiman368]

The greatest professor on the internet! Thank you so much sir!!!

[@sanjitpandey552]

Are you sure the cameraman getting paid? I don't think so.

[@muhammadsaadsarfraz9915]

now i think this subject is interesting thanks professor

[@JamieSchmidttie]

Professor Biddle is a real motha fucka, he has saved me this quarter

[@oneofyk]

were the r1 and r2 values given in the last question? cant seem to find where if the proff mentions them

[@barcorn6991]

it is given in the question r2=40mm and r1=20mm

[@mohammadqasim7773]

What a gem ❤️

[@CPPMechEngTutorials]

He sure is.

[@xplosiveactionarchive9092]

What is the difference between Ui and Uo equation wise? Would Uo be the full 1/denominator and Ui be 1/conv(inside)+cond(through) or just 1/conv(inside) ?

[@princezachariah4893]

thank you professor

[@berkecakr3467]

Great !

[@drscott1]

👍🏼

[@CPPMechEngTutorials]

👍🏼

[@mikhailfong6234]

What a gem of a Professor. Crystal clear and precise. You guys are/were so fortunate to have him. Salute and respect to Professor Biddle.
Malaysia

[@CPPMechEngTutorials]

Thanks!

[@alazharalhadrami9137]

I totally agree with you? couldn't get better doctor or professor to explain this well

[@berkestudent9877]

Great !

[@hemre1913]

what a dump cameraman :''/

[@devrajgoswami4357]

Everything good awesome teaching good video n sound quality but the cameraman :"wait lemme use this cool function called zoom"

[@barcorn6991]

finding the temperature isn't the denominator of the thermal resistance of the cylinder suppose to be 2piK?

[@shreddingstranger]

Yes

[@mohammedalzaabi2969]

I think yes

[@edanurkose5942]

thats because we use diameter, not radius

[@_MITALIDIWEKAR]

I wish I had a professor like you in my uni. Literally a gem!

[@Zoom8188-ee1hq]

well for the rod problem, someone forgot to give us the values for r1 and r2 as well as the K lol

[@orlandocanada2738]

hello sir thankyou for uploading informative videos,

[@thetahirss]

I think, Lins/Kins is equals to 1.087 18:40

[@TheKiwi0201]

I'm curious that how can I exactly calculate h_air ?

[@theograss2186]

It’s a table value !

[@AquaponicsEngineer]

So how do you get "h" value for air at temperature 5 C or 25 C. ext. Thanks..

[@dinushachathuranga7657]

Buch of thanks for crystal clear explanations.❤❤❤

[@abahomark290]

what's are the values for the first question. i seem to be getting a different answer

[@morfinview]

Absolutely wonderful ❤

[@EvaIungbliudt]

Super clear!!! Huge thanks

[@zaccolyer3053]

any chance you cover topics for fluids 2

[@alazharalhadrami9137]

Can you please give us the homework as well ? so we can solve them too :(

[@CPPMechEngTutorials]

The syllabi are at this website: www.cpp.edu/meonline/heat-transfer.shtml

[@sreeharisureshbabu268]

Thank you prof!💮

[@barcorn6991]

P3.52). is it not suppose to be 251 W/m

[@abahomark290]

how do you get D?

[@emir2591]

legend

[@CPPMechEngTutorials]

He sure is.

[@falconplayz923]

which text book he is using for this course? kindly mention auther's name and volume of the book too

[@Mmichel07]

I'm guessing, "introduction to heat transfer, 6th ed" bergman, T.L et. al, published by wiley