Yeah it should be 1/4 instead of 1/8 but final answer will be same as that formula u=umax(1-(r/R)^2) is independent of that 1/4 or 1/8...so by mistake answer is correct 😅
At 2:23 For Turbulent Flow many take Turbulent Flow for Reynolds number greater than 4000. Laminar is for less than 2000. I noticed it in a question of test series of ACE Academy.
Please sir more focus on open channel flow and dimensional analysis while studying these topics,Also provide more concept and numerical on this topic,these topics are more in gate point of view.please sir
The formula is wrong for finding ū. It gives 1=1-(r/R)^2 which results in r=0. So this formula is only applicable for finding velocity at any radius r. Also remember that there will be (1/2) in the formula which Sir forgot. So by this logic it’s appropriate to say that for finding ū the values of viscosity and pressure gradient must be given in the question. So I think the question is either inaccurate or incomplete.
Sir for laminar flow in a pipe what is the velocity at the point of maximum instability? the point of maximum instability occurs at what distance from center of the pipe?
@@shivesh.shukla2571wrong. It’s 1=1-(r/R)^2 which gives r=0. I think you cannot find ū using this formula. This formula is only applicable for finding velocity city at any radius r. The question is not correct or incomplete. For finding ū the pressure gradient and viscosity requirements are completely necessary.
Although your teaching is very good but you should at least allow the students to see what you have written. Most of the time you block the board and then the camera shifts along with you. But I am not complaining, just a feedback. Besides it’s more than 6 years, I don’t think you would even look at this comment.
U r explained well sir but there's a small error in the formula used in the last que. 1/8 is used instead of 1/4
correct
Yes bro
Yeah it should be 1/4 instead of 1/8 but final answer will be same as that formula u=umax(1-(r/R)^2) is independent of that 1/4 or 1/8...so by mistake answer is correct 😅
@@studyspectra_1980 but then wont it be 1/4 / 1/8 and that will leave us with 2??
Yes
At 2:23 For Turbulent Flow many take Turbulent Flow for Reynolds number greater than 4000. Laminar is for less than 2000.
I noticed it in a question of test series of ACE Academy.
Bt 2000 and 4000 is transmission state so mathematically we use turbulent flow formulas for this state
All good but in sec question formula is wrong.....umax=1/4not 1/8
thank you so much sir....for clearing all the doubts with basic level.....nice one
thanks to gate academy.......
Sir thank you for providing these lectures
Sir please thermal science bhi suru Kro...and again excellent video.
sir at 25.07 the equation of maximum velocity is wrong
Sir second question me apne jo 2nd formula likha vo syd 4 ayega vhn pr
Hmm Right
Bt read description
Great sir 💓big fan of u
Thanks sir for the brilliant lecture there was a little confusion but after read the description it is clear..
Thanku so much sir ....your teaching style is the best sir ..
Sir, at 20:27 8 ki jagah 4 ayega..
Sir your lecture is very beneficial for me. And I wish your another video on theory of machine and I.C. engine. I am waiting for that.
King of fluid
Sir in last que you wrote that Umax = 1/8 insted of 1/4..
Superb videos sir..thanks alot sir☺
In the pipe, the flow will be turbulent when Raynold's no will be greater than 4000. 2000-4000 it will be transitional flow.
Please sir more focus on open channel flow and dimensional analysis while studying these topics,Also provide more concept and numerical on this topic,these topics are more in gate point of view.please sir
Sir please provide civil engineering lectures please.
Thank you sir❤🙏
Thank you so much sir 👍👍🙏❤️🔥😎
Sir you proved that u max contains 4 in denominator but in second question how you write 8 in denominator?
Yes, that's wrong, its 4 only
If so then it becomes equals to 1 on LHS and r becomes automatically zero. How?
The formula is wrong for finding ū. It gives 1=1-(r/R)^2 which results in r=0. So this formula is only applicable for finding velocity at any radius r. Also remember that there will be (1/2) in the formula which Sir forgot.
So by this logic it’s appropriate to say that for finding ū the values of viscosity and pressure gradient must be given in the question. So I think the question is either inaccurate or incomplete.
Sir for laminar flow in a pipe what is the velocity at the point of maximum instability? the point of maximum instability occurs at what distance from center of the pipe?
How is Length=Dia??
Thank you sir
Sir..thank you...
Sir I think U = (Umax/2) ( 1- (r/R)^2 ) is the correct formula
If u solve this u get r equals to zero. How??
@@chingchongbou2938 You'll find 1=(r/R)2
@@shivesh.shukla2571wrong. It’s 1=1-(r/R)^2 which gives r=0. I think you cannot find ū using this formula. This formula is only applicable for finding velocity city at any radius r.
The question is not correct or incomplete. For finding ū the pressure gradient and viscosity requirements are completely necessary.
Thanks Sir 👍
Thank you very much sir..
Numerical from the book of RK Bansal sir
Sir can we get any site from where we can have the full exact notes of these lectures or we have to make our own notes by copying.
Plzz sir can you provide us a lecture on fluid machinery
Sir make a video on Reynolds transport theorem derivation
Thanks sir ji
Sir ye video ALP ke liye prayog kr sakte hai
❤️❤️❤️❤️
Sir fluid machines bhi ap complete kar doge na??
Sir Umax toh 1/4dynamic viscosity hota h but apne Umax ko 1/8dynamic viscosity liya h plz explain? ????
dear sir,
in first question pressure drop =683520 n/m^2
Check your ans again its 684288 N/m^2
sir Base electrical engineering More videos.... plz
Please sir... FM thoda jldi complete krwa digiye
imran mann yes new subjects are arriving soon.
Er. Venugopal sharma thank you so much sir.. we are totally depending upon you....
Er. Venugopal sharma sir which subject theory of machine???
Er. Venugopal sharma subjects from civil branch ???
Sir university exams mai ise jada complex numerical ate hai....please thoda complex numerical bhi karao
Rahul Jain next video of numerical me hai watch that
❤️
But sir in turbulent flow Re greater than 4000
Drag force and turbine plzz
Rushikesh Malpe refer 1st video to know the syllabus
Sir pdf
Although your teaching is very good but you should at least allow the students to see what you have written. Most of the time you block the board and then the camera shifts along with you.
But I am not complaining, just a feedback. Besides it’s more than 6 years, I don’t think you would even look at this comment.
Sir 2nd question m max velocity ka value 1/4 hota..lekin aap 1/8 kiye ho..
r value is 86.60mm (as my solution)
Kaise bro can u send me the solution
@@mohd.shoaib5738 agar right kiya tho zero ah raha hi na radius ka value!!
@@cmharshadpatel4941 no bro
@@mohd.shoaib5738 gotcha bruh!
R value zero aa rha h.. please explain wat to do