Lecture 12 | Problems on Extended Surfaces | Heat and Mass Transfer

[@ashwinbalasubramaniam4636]

Thank you so much sir

[@melindabaye439]

this was so helpful thank you

[@santoshkumargagan3150]

Sir i have doubt regarding to identify the problem whether it is short or long fin. Sir u told that when in prblems diameter and length are greater than 30 we should asumme as long fin But in this question length is 50mm sir so why do you doesn't assume long fin. You took short fin formulas Y sir Plz explain

[@vigneshwarakb3685]

L/D greater than 30 bro... or they will mention term short or long

[@swap20247]

When val of Length is more then 5 cons it has infinite or long fin and less then 5 short you will understand it better when you will take out the efficiency for long and short fins

[@edutechguruengineeringlear4280]

@@swap20247 kzbin.info/www/bejne/pqvJp4GQmL6DrJY

[@Joshua-cd9yo]

Sir rectangle perimeter is 2(l+b) sir

[@VENKATQ]

ss... but b is very small compared to L... so we usually neglect that one...

[@Joshua-cd9yo]

Thank you sir

[@engineeringguy3854]

sir, why area isn't Lcy*Lfin? heat is transferred to surrounding from the fin side area. could you clear my doubt ,sir?

[@watcher6532]

sir in perimeter and area we need to take lengh of the fin but u took lenth of cylinder ?

[@snvcreation3727]

🙄

[@anuragsolution70]

Sir Perimeter is 1+1 = 2 m and you have taken 2 cm sir as lenth of cylinder is 1m not 1 cm

[@pradhumnj369]

If there are 5 fins of different Lf then in calculation what we should consider for Lf? Lf = Length of fin

[@edutechguruengineeringlear4280]

kzbin.info/www/bejne/pqvJp4GQmL6DrJY

[@saipavanpotta7240]

in which book you are explaining tell me book author name sir

[@dbalaji8573]

Sir in qs how are you assuming it is insulated even it is not given in qs so we need to take short fin with end not instulated

[@ArunKumar-db3rw]

dei bals

[@dbalaji8573]

@@ArunKumar-db3rw nee engada inga

[@ArunKumar-db3rw]

@@dbalaji8573 naanum unna mari padikka vanthavan than 😂😂😂

[@dbalaji8573]

@@ArunKumar-db3rw nee mattum padicha pothathu padikratha group la share pannu bro

[@VENKATQ]

It can be assumed for both cases... Choose the easiest way.... Formula for end insulated seems easier...

[@सुदीप-घ1च]

Write the tings small so that we can't able to see 😢😢, before making video u have to check sir

[@JayaPrakash-ij8pb]

The thermal conductivity (k) is wrong in question but you write in correct

[@edutechguruengineeringlear4280]

kzbin.info/www/bejne/pqvJp4GQmL6DrJY

[@05__abhisheksharma76]

Can you please check your calculations 👁👁

[@edutechguruengineeringlear4280]

kzbin.info/www/bejne/pqvJp4GQmL6DrJY

[@05__abhisheksharma76]

2×L = 0.014 🙂

[@edutechguruengineeringlear4280]

kzbin.info/www/bejne/pqvJp4GQmL6DrJY