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
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👍
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
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
For fully turbulent flow, should not we multiply 2 calculating h(avg)?
Sir at 13:35 how do you find area of cylinder... which formula did you taken for Area(a)?
π×D×L
sir in laminar for average heat transfer coefficient why we didnt multiply h by 2
Yeah🤔
How to find velocity components? In external convection heat transfer
For finding Q , why u don't multiply h by 2 to find av. heat transfer coefficient ??
Sir wanted to take average h only but by mistake sir wrote local h
sir which data book you follow ??
can u please tell me the name or can u please share me the pdf link over here
Heat and mass transfer data book by C P Kothandaraman
S Subramanyan
sir, can i get the photos of page 114, because i downloaded book online, but there is no page 114 covered.
Book name.... plz
Properties of 170 degree celcius is not given in table. How did you find?
property at 160 and 180 deg. C were given in table...Take the average value else do interpolation
@@VENKATQ some of them can't be done even if we take avg
@@tajibkhankhan2822 s for that we have to go for interpolation method...or else we can take the nearest value to our knowledge...
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
If flow over is given it is external
If flow through is given it is internal flow
In free convection no velocity will begiven whereas in forced convection velocity will be given
Why density value is neglected
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
Sarji make video on overall heat transfer coefficient of different industrial dryer pl.
Thank you sir me videos chudadam valla exam pass sir
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👍
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
Area formula sir for cylinder
Sir which book I followed.... plz tell Sir. ....
Rc sachdeva
@@VENKATQ there are so many books.. when I searched in Google. .....
@@nagunagu9360 books.google.co.in/books/about/Fundamentals_of_Engineering_Heat_and_Mas.html?id=oVm3ngEACAAJ&redir_esc=y
Thank you sir
Re=2×10^5
Re=5×10^5
When to use these two values?
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
Tqq sir
Thank you so much sir
sir in laminar for average heat transfer coefficient why we didnt multiply h by 2
sir in laminar for average heat transfer coefficient why we didnt multiply h by 2