Lumped system Analysis

This lecture intends to theoretically understand the lumped system mechanism in unsteady state heat transfer process .

[@mechanicalengineering1315]

there are not many people who explain this topic with such practical example, great work sir.

[@namaaali4609]

Amazing illustration

[@rajrajput9749]

Wow, what an explanation... practically....we really want this type of more explanation...thnks

[@lkdsamte4910]

One of the best explanations!

[@sohrabhossain6493]

Very good explanation.

[@bandaralhazemi7751]

I'll recommend your channel to every student in my class. Very well explained. Thanks a lot.

[@Dr.AmitMandal]

bandar alhazemy thanks

[@SuryaPrakash-vk9ev]

The Explanation is pretty good. Thank you, Mr. Amit Mandal

[@roshanpatel4216]

You have really good teaching skills,keep it up!

[@apurvakhartad191]

Very nice explaination sir. Thanks for showing us such simple and easy to understand examples.

[@govindsir6861]

Great sir..
What a clarity, thank you so much sir..

[@poojashende3272]

Thank you Sir..your video has really helped me a lot to clear my concepts.

[@gavihiremath6504]

Well ,neatly explained

[@therandombanda101]

Sir.. perfect explanation and thanks a lot.. i was confused abt heat loss in furnace with lumped system but this cleared it... looing forward for more videos

[@sairamaraju6652]

Great explanation with practical applications nice bro tq

[@naveenexpress9009]

Why clg faculty is nothing in front of u sir. Very good explanation 😍😍😘😘

[@pandeyvikas1654]

So well explained sir

[@mukeshkumar-pz8gg]

thank you sir for such a nice explanation

[@rajayerramsetti5887]

Thanks sir for helping me alot🐂

[@govindmenon101]

thank you: -) helped a lot

[@himanshusharma9131]

most fabulous

[@Sravankumar0729]

thank you sir

[@ashishdayanand9578]

Very nice 👌

[@nihar5806]

Thank you sir..

[@ravidivecha1921]

Konsi college me padhate ho sir? Vahi join kar leta hu...very well explained...

[@nabilkhatri816]

Though i fully understand your video but i do wanna recommend you to upload videos in HINDI with ENGLISH subtitles.. by doing that you would reduce your conversational explanation error.
i hope i'm not disappointing you rather than letting you to know the fact and giving you a very transparent review.!

[@Dr.AmitMandal]

+Nabil Khatri thanks for your comments, I speak in colloquial english. It could not be grammatically correct but easily understandable. My most of views comes from America and english countries...

[@surendranauhwar1996]

sir video of natural frequency by i centre method please

[@Nikhil-vy2lt]

Very good video.

[@erickrobles6365]

why is temperature profile with time expresses as a dimensionless equation?? As oppose to just T-Tinfinity = ...

[@Dr.AmitMandal]

I am unable to understand , eleborate some more...

[@erickrobles6365]

Yes. So when the temperature distribution for a fin was derived, they set it at T(x)-T(infinity)/(To -Tinfinity). In this video, the same applies but instead of T(x) we have T(t). Why do we express it as a ratio of temperature difference?

[@Dr.AmitMandal]

Sure, I case of fin we study steady state heat transfer means no effect of time on heat transfer. Lumped system is transient state i.e. heat transfer rate depends on time.T(t) is temperature at particular time...

[@ahmadsyakir1386]

your explanation on watermelon, it is not lumped system because it have different type of molecule between outside skin and the inside fruit right?

[@Dr.AmitMandal]

+ahmad syakir no its only the temperature fall is with different rate at different points...

[@DhananjayKumar-zx5xo]

Excellent

[@surendranauhwar1996]

and also i centre nd keneddy

[@alfesani177]

very much helpful to understand the basic theory and equation. for me lumped system is now transparent as glass. thank you .

[@mfezekisitwazi6736]

wonderful but please consider using diagrams for explanations

[@RohitKumar-nd1sw]

Energy balance me _msdt k jagah negative sign kyu liye sir plz guide me.

[@Dr.AmitMandal]

Because heat is is lost to surrounding, if it would have been gained, then positive..

[@RohitKumar-nd1sw]

@@Dr.AmitMandal ok sir. , thanks a lot and very gd morning. For giving my answer. !!!!!

[@poonamrathod2010]

What is characteristic length?

[@Dr.AmitMandal]

It is object specific, for example , the diameter of sphere is taken as characteristic length, for vertical cylinder the height, for horizontal cylinder the diameter...

[@Dr.AmitMandal]

However for lumped system , it is the volume / surface area of object

[@tanvirahmadhashmi3558]

How is it possible that without temperature gradient, heat transfer takes place? In steady state, change in temperature w.r.t to time is zero. That doesn't mean that change in temperature is not taking place, but it is taking place in steady state condition which is also the case for lumped system. Then what is the difference between lumped system and steady state system? As in both system change in temperature w.r.t to time is zero. Please resolve my query.

[@Dr.AmitMandal]

Temperature gradient with space is still present in lumped system

[@teamdark9022]

@@Dr.AmitMandal You have mentioned the temperature to be same in the video, instead rate of change of temperature (with time) is same? (All the points in the body will have their temperatures decrease or increase uniformly with time although they can be different?

[@MilindNikose]

Negative sign is missing. e rasied (- biot * fourier )

[@Dr.AmitMandal]

+Milind Nikose it is there

[@MilindNikose]

Amit Mandal just noticed it. Thanks

[@shubhamkhandelwal9414]

Easily explained

[@shrey_shr1275]

This video is Providing confusing study material👎👎👎👎👎