Heat Transfer (06): 1D conduction in a cylindrical wall, composite wall network model

0:00:15 - Review of previous lecture
0:02:49 - Composite wall network in series
0:14:27 - Composite wall network in parallel
0:29:46 - Steady state 1D conduction in a cylindrical 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/meonline​​​​
This lecture series was recorded live at Cal Poly Pomona during Spring 2020. The textbook is "Introduction to Heat Transfer" by Bergman et al.

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Prof. Biddle consistently receives among the best student evaluations.

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Your videos are the only reason I passed heat transfer. You explain it in such a simple way that with everything from previous knowledge in Engineering Analysis helped me pass. The biggest lifesaver. Thank you so much!!!

[@sushilachandel2947]

These lectures have been a lifesaver during online classes. Thank you!

[@barcorn6991]

indeed

[@allenaparejado3721]

If anyone is wondering about the disappearance of negative sign from the heat flow formula at 43:22, it's because of the mistake in T(r). The denominator should be ln (r1/r2). So when it comes to heat flow, the negative sign was used in natural log making it ln (r2/r1). Hope this helps.

[@KSHIMISH]

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[@sallyali1159]

Thank you professor you are a great teacher
what is reference name?

[@Bob-ud1eh]

What is the 3rd and 4th boundary condition for cylindrical walls? I understand it was skipped however, I cant find it in my book.

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[@user-tm3ob7cv1w]

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[@nournoman9191]

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[@fitriedian3114]

Hi Sir, Thanks for sharing. I need assistance, what if the case I need to find the energy (Q) but i dont know the wall Temp, Ta or Ta/b or Tb. The parameters available only Ti and To. How should I estimate the unknown temperature? Thanks

[@abahomark290]

You will know atleast one of the parameters. They are the ones your finding so no need to estimate

[@hadideyal9377]

Thank's sir

[@abdullahmdsadik1668]

at 41:53 , will it be T2-T1 instead of T1-T2?

[@hiepthaivan979]

that's correct. because professor forgot minus front of the temperature equation above
.

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basically higher temp - lower temp so yeah

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[@jonathanchan3027]

23:30

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