Heat Transfer (30) - Combined internal and external heat transfer in tubes

[Time stamps will be added in the future]
Note: This Heat Transfer lecture series (recorded in Spring 2020 & Spring 2022) will eventually replace the earlier Heat Transfer series (recorded in Fall 2015). 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 was recorded live at Cal Poly Pomona during Spring 2022. The textbook is "Fundamentals of Heat and Mass Transfer", Bergman et al., 8th Edition.

[@husnainhyder6713]

Now it seems clearly.
Thanks
Prof John Biddles along with whole CalPoly Team

[@Entius007]

How did he solve Tso?

[@MrThetruthteller]

n for Pr number should be 0.40 since it was heating

[@Mmichel07]

Nice problem!

[@hacmustafaozturk708]

adamsın John Biddles

[@hasundarwiche5589]

shouldn't it be pradtl raised to 0.4 for heating of turbulent internal flows rather than 1/3

[@mustafaakkol4594]

i think it should be 0.4 too

[@importfea8455]

No, it is valid for "turbulent internal flows". Pr^(1/3) is used for "external flow (flow over cylinder)".

[@byungshin8773]

he corrects himself later in the video at around 36:20 for a different problem. He forgot to correct it in the earlier problem, though

[@Entius007]

How did you solve Tso?

[@plopterjones2147]

Im wondering the same thing.

[@plopterjones2147]

Nvm, so, all the variables are known, then he just solves, look at the check marks.