Lecture 15 | Problems on Forced Convection over Flat plate and cylinder | Heat and Mass Transfer

[@ashamethiopa374]

HELLO M.r this your student from Ethiopia you thought me well, but the only thing that i suggest you to prove is the entry high sound which is disturbing students that uses earphone. Thanks

[@p.jithendraprasad2344]

Thank you sir me videos chudadam valla exam pass sir

[@WATCHOUTyoutube]

for external flow over blunt objects, like cylinder, critical reynolds number is 2 x 10^5.
since 2.08 x 10^5 is greater than critical Reynolds number, flow is TURBULENT, not laminar.
otherwise, great video👍

[@VENKATQ]

Between reynolds number 2lakh to 5lakh flow changes from laminar to turbulent... That region is called as transition region... However for calculation we will use anything below 5 lakh It is laminar flow only...Thank uuu

[@user-ne6wj9eq2i]

How to find velocity components? In external convection heat transfer

[@JAashiqMohammed]

sir in laminar for average heat transfer coefficient why we didnt multiply h by 2

[@rajukodala2059]

Sarji make video on overall heat transfer coefficient of different industrial dryer pl.

[@_KAUSHALBISWAS]

sir which data book you follow ??
can u please tell me the name or can u please share me the pdf link over here

[@fishhushh4546]

Heat and mass transfer data book by C P Kothandaraman
S Subramanyan

[@prasanthcompetative8645]

Sir at 13:35 how do you find area of cylinder... which formula did you taken for Area(a)?

[@S.ammucharan]

π×D×L

[@gamingfever3699]

For finding Q , why u don't multiply h by 2 to find av. heat transfer coefficient ??

[@brajnandanku]

Sir wanted to take average h only but by mistake sir wrote local h

[@jackiepatidar3426]

sir, can i get the photos of page 114, because i downloaded book online, but there is no page 114 covered.

[@nagunagu9360]

Book name.... plz

[@akmalalikhan1572]

Thank you sir

[@fishhushh4546]

Tqq sir

[@KaranYadav-pm2mf]

Why density value is neglected

[@tajibkhankhan2822]

Properties of 170 degree celcius is not given in table. How did you find?

[@VENKATQ]

property at 160 and 180 deg. C were given in table...Take the average value else do interpolation

[@tajibkhankhan2822]

@@VENKATQ some of them can't be done even if we take avg

[@VENKATQ]

@@tajibkhankhan2822 s for that we have to go for interpolation method...or else we can take the nearest value to our knowledge...

[@Chandu.8332]

Sir how to know this problem is external forced convection
And why would we all are not called this problem internal flow or free convection

[@Anand-dl8cm]

If flow over is given it is external
If flow through is given it is internal flow

[@Anand-dl8cm]

In free convection no velocity will begiven whereas in forced convection velocity will be given

[@peeruz_art]

Thank you so much sir

[@shridharnaganur872]

Area formula sir for cylinder

[@nagunagu9360]

Sir which book I followed.... plz tell Sir. ....

[@VENKATQ]

Rc sachdeva

[@nagunagu9360]

@@VENKATQ there are so many books.. when I searched in Google. .....

[@VENKATQ]

@@nagunagu9360 books.google.co.in/books/about/Fundamentals_of_Engineering_Heat_and_Mas.html?id=oVm3ngEACAAJ&redir_esc=y

[@tajibkhankhan2822]

Re=2×10^5
Re=5×10^5
When to use these two values?

[@VENKATQ]

Between reynolds number 2lakh to 5lakh flow changes from laminar to turbulent... That region is called as transition region... However for calculation we will use anything below 5 lakh It is laminar flow only

[@user-tz6zl6gm6j]

sir in laminar for average heat transfer coefficient why we didnt multiply h by 2

[@le301-rakeshkumar9]

Yeah🤔

[@JAashiqMohammed]

sir in laminar for average heat transfer coefficient why we didnt multiply h by 2