Turbulent flow me boundary ke pass anewale particles laminar ki tarah behave karte hai kunki velocity kam hone ke karn , ye concept bahut acche se samaj aya si thank you sir Hame ye concepts semester ke vakt professors nahi batate hai , apne ye samajadiya ,aise concept kiske karn hota hai ye bhi bataya, yahi to hame Chahiye tha aur apne diya once again thank you sir
Those professors simply come to finish the syllabus and get their heavy salaries. They don’t care at all for teaching the students. These professors with their years of experience want us to understand the topics in one shot. That’s why these so called “gyan bhandars” are producing engineers with just degrees and not conceptual understandings.
Small correction: The 'Reynolds stress' was not a formula given by Reynolds. This term originates when you substitute the u and v values for turbulent condition in the Navier-Stokes equation. This is famously known as the closure problem of turbulence.
Good video, nice work: just one correction - the laminar sublayer is a misnomer for viscous sublayer; flow field near the wall is highly turbulent because of the shear which is responsible for sustenance of turbulence (without shear turbulence can never sustain). The misnomer 'laminar' sublayer arises because when you scale the mean flow velocity with friction velocity at the wall, the profile collapses to the linear profile. The observed linearity has nothing to do with the flow being laminar!
Watch the lecture carefully. Sir already told that at or near the wall the viscous force dominates due to which the velocity becomes considerably small. Therefore finding velocity distribution at y=0 for Turbulent flow becomes irrelevant. I hope you understood.
Sorry to be off topic but does anyone know a trick to get back into an instagram account..? I was dumb forgot my password. I would appreciate any tricks you can give me
sir you are saying turbulent flow is always unsteady it means local acceration exist then in darcy wesibach equation which is also valid for turbulent flow we have asummed that net force equal to zero we have negelected local acceleration. why??
In the derivation of Darcy wesibach equation, we did not consider small element. Instead we used the whole system and applied Newton's law on it so that we don't have to worry about the local acceleration.
Sir, Darcy weisbach eq is valid for steady flow but in this lecture u said tubulent flow is 3D and unsteady. How can we use Darcy equation in turbulent flow.
In prandtls mixing length derivation We take shear stress is boundary shear stress than how velocity distribution equation by this derivation is valid for entire flow section
If y is small than shear stress is equal to wall shear stress, but shear velocity can derive same by dimensional analysis by taking shear stress at fluid or shear stress at wall.
Sir I have an doubt about the properties of Fluid which is mentioned in comment box property of Fluid part 2... Please solve it I cannot watch next videos....
Sir in the last part ,,if Re is less than 4 then we are considering it as smooth in case of turbulent but if Re is less than 2000 ,, it is the case of laminar flow ,, could you explain this .
sir Prandtl universal velocity is not define at solid boundary layer because log(zero ) is not defined what will you say about this because mathematically it is 100% fault.
Er. Venugopal sharma sir i mean to ask hw much tym it will take as i want to complete the sub within 2 weeks....and ur video lectures are damn gud ....i m comfortable with ur teaching technique ....so if u can complete the sub within next week (which i dnt think so a easy task ) den it will be gud for me
) In a completely turbulent flows the headloss a) Increases withVelocity b) Increases with velocity squared c) Decreases with wall roughness d) Increaseswithdiameter e) Increaseswithflowrate
Turbulent flow me boundary ke pass anewale particles laminar ki tarah behave karte hai kunki velocity kam hone ke karn , ye concept bahut acche se samaj aya si thank you sir
Hame ye concepts semester ke vakt professors nahi batate hai , apne ye samajadiya ,aise concept kiske karn hota hai ye bhi bataya, yahi to hame
Chahiye tha aur apne diya once again thank you sir
Those professors simply come to finish the syllabus and get their heavy salaries. They don’t care at all for teaching the students. These professors with their years of experience want us to understand the topics in one shot. That’s why these so called “gyan bhandars” are producing engineers with just degrees and not conceptual understandings.
Thanks for this vedio, your efforts to clear all the concepts to viewers, this is extremely tremendous.
Sir your teaching is excellent ..,you proved it wrong that one teacher can teach a single subject only.thanks sir for such awesome lectures
thank you so much sir....all the doubt automatically get clear after watching you lecture.....thank to gate academy team
Thanx sir ji
Next video ka wait kr rha hu
Great sir
You are very good and sir....
I like your way of teaching...
really very helpful video
Thankyou sir! A big thankyou for you and your team😊😊
Small correction: The 'Reynolds stress' was not a formula given by Reynolds. This term originates when you substitute the u and v values for turbulent condition in the Navier-Stokes equation. This is famously known as the closure problem of turbulence.
Thanks for your info.
Good video, nice work: just one correction - the laminar sublayer is a misnomer for viscous sublayer; flow field near the wall is highly turbulent because of the shear which is responsible for sustenance of turbulence (without shear turbulence can never sustain). The misnomer 'laminar' sublayer arises because when you scale the mean flow velocity with friction velocity at the wall, the profile collapses to the linear profile. The observed linearity has nothing to do with the flow being laminar!
thanks sir you explain well.
thank you so much,sir
Your teaching is excellent !
At 31:00 why didn't we take at y=0, u=0 which we did while solving earlier equations? C will be 0 by that
Watch the lecture carefully. Sir already told that at or near the wall the viscous force dominates due to which the velocity becomes considerably small. Therefore finding velocity distribution at y=0 for Turbulent flow becomes irrelevant. I hope you understood.
awesome video loved it thanks a lot.learned alot
very good explanation sirr
What an Amazing 🤩 Vd lecture sir❤️... I cleared all the concept of turbulent flow in pipe 🙏...
THANKYOU SO MUCH GURU JI🤗🤗
Sorry to be off topic but does anyone know a trick to get back into an instagram account..?
I was dumb forgot my password. I would appreciate any tricks you can give me
@@bryantbrooks7934 try e-mail
u r simply osmmm..great job
VG sir is best of best
Excellent video Sir.
hlw sir ,thku so much for your great work .try to upload more videos in a day pls.
Thank u so much sir , your video lectures are very usefull ❤️
Sir ne Laminar Flow ka video nhi daala tha kya??? Because woh mil nhi rha hai.
sir you are saying turbulent flow is always unsteady it means local acceration exist then in darcy wesibach equation which is also valid for turbulent flow we have asummed that net force equal to zero we have negelected local acceleration. why??
In the derivation of Darcy wesibach equation, we did not consider small element. Instead we used the whole system and applied Newton's law on it so that we don't have to worry about the local acceleration.
Steady flow can be both Turbulent and Laminar.
@@sanketnawale7505 but according to sir tarbulent flow is always unsteady
Thanks a lot sir 👍👌🙏❤️🔥😎
Which flow has higher velocity at center laminar or turbulent
18:08 sir u' and v' ki value same q hai
Experimental proven
In du/dy......y is not direction y represents distance measured from pipe wall.
Thank you so much sir
Very effective sir ji
Did you have helping video for mechatronics engineering subjects ?
Sir when will we study boundry layer theory
Sir, Darcy weisbach eq is valid for steady flow but in this lecture u said tubulent flow is 3D and unsteady. How can we use Darcy equation in turbulent flow.
Thank you sir
sir pls upload fluid machinery....
Does this come in Gate?
Yes required for gate
Nice sir
In prandtls mixing length derivation
We take shear stress is boundary shear stress than how velocity distribution equation by this derivation is valid for entire flow section
the total shear stress = laminar + turbulent SS, , total SS equation is valid for whole section.
If y is small than shear stress is equal to wall shear stress, but shear velocity can derive same by dimensional analysis by taking shear stress at fluid or
shear stress at wall.
Sir plz thermal ke lectures karvao na..!
Nice
Sii If Turbulent flow is unsteady flow then how Bernoulli equation can be applied to find Darcy Weisbach equation ???
Sir next video kab upload karoge
I am waiting for it
Thank you so much
plzzz make more videos related to mechanical engineering subjects
Thanks🙏🙇🙏💕.. a lot..
Sir great lecture..
Sir, a small doubt. How is laminar sub layer different from boundary layer?
Laminar sub layer is close to wall my friend. Boundary layer has very big definition, which boundary layer you are refering to? fully developed?
Sir,
Can you please let me know about Shear velocity U★.in turbulent flow.
with details
Thanks a lot sir
Sir I have an doubt about the properties of Fluid which is mentioned in comment box property of Fluid part 2...
Please solve it
I cannot watch next videos....
Vry nice
Thanks Sir 👍
Sir, could you also make lectures on applied thermodynamics...thank you
THANKS SIR
Thanks
Sir FM ki puri sllybus ki video aap ke padne koe file me available h kya.... Sr sequence wise milta nhi h....
check the playlist
Sir fm2 according to syllabus kaha milega plzzz help me sir
Sir itne assumptions lene padte hai to rehne dete hai na fr
btw jokes apart sir you're the best teacher i have ever met online
Sir Moody's diagram ko explain karne ko kha tha aap ne but wo to btaya hi nhi
Sir in the last part ,,if Re is less than 4 then we are considering it as smooth in case of turbulent but if Re is less than 2000 ,, it is the case of laminar flow ,, could you explain this .
Re < 4, means, surface is smooth, not the flow. and Re < 2000 means flow is smooth not the surface.
sir, what about the moody's diagram???
Sir laminar flow ka lecturr upload nhi kiye hai kya. Only turbulent flow ka lectures hai
Sir please upload compressible flow
Upload the pulsating plates
sir please upload next lectures
Sir Laminar Flow waala Video nhi mil rha hai🥺
sir darcy equation me toh steady flow mana tha pr abhi turbulent flow ko unsteady kyu bola?
u= u,max +2.5u,*ln(0/R) is not equalt to zero ?
Ln0 is not defined
Sir how to get notes pdf of fluid mechanics
sir Prandtl universal velocity is not define at solid boundary layer because log(zero ) is not defined
what will you say about this because mathematically it is 100% fault.
Boundary surface was consider just for reference only
sir production ka class start kare
Turbulent flow nu gujrati su thay?
sir Kitne tym me saare videos upload ho jaayenge ....i mean turbines k bhi
Jaimin Shah fluid machinery is different module
Er. Venugopal sharma sir i mean to ask hw much tym it will take as i want to complete the sub within 2 weeks....and ur video lectures are damn gud ....i m comfortable with ur teaching technique ....so if u can complete the sub within next week (which i dnt think so a easy task ) den it will be gud for me
Sir, 25 August tk FM khtm ho jayega??
pratibha kumari pehle hi then som and thermo
Sir plz take thermo first...!
Er. Venugopal sharma som and thermo aap teach karoge
IES MECHANICAL, IN FM, BOUNDRY LAYER HAI YA NAHI.
Saale ko subject ka hi nhi pta kya bne ka ye IES
Why u have not solved any numerical problem?
20:00
Ye sb practical life me use huga 🤔🤔
Sir, log function is not defined at '0'. How do we explain 'u' when y is zero. At y=0. u=Umax + ln (0)
At y=0 pr laminar flow hoga (laminar sub layer) tb ye eqn nahi hoga
Why in steady flow net force=0
Because local acceleration is zero for steady flow ,therefore F=m*a = 0
Hmt per banao sir
) In a completely turbulent flows the headloss
a) Increases withVelocity
b) Increases with velocity squared
c) Decreases with wall roughness
d) Increaseswithdiameter e) Increaseswithflowrate
B) velocity square.
prabhu
Sir speak English but I' cont understand hindi
Sab mix ho gya 🥺
Don't hack gate acedamy plus...
Aap sirf theory teach karte ho
Bhai ab tu bacha nhi rha khud bhi kr sakta hai tu itna concept btaadiya wo bhi halke halke wo bhi bohot hai
Thanx sir ji
Next video ka wait kr rha hu
Thank you sir ❤
Thank you so much sir ...
Thank you sir🙏
Thank you Sir ji
Thank you sir❤🙏
Thanks sir
thank you sir ji
Thank you sir
Thank you sir