Fluid Mechanics | Module 5 | Fluid Flow | Darcy Weisbach Equation (Lecture 40)

[@aquibansari5080]

You don't have to remember Hagen's equation separately. Just plug in f=64/Re in Darcy's equation to get the same result(Hagen)

[@Riteshkumar-zf1hw]

Thanks bro

[@darrensamir4580]

i dont mean to be offtopic but does someone know of a tool to get back into an Instagram account?? I somehow forgot my password. I love any help you can offer me!

[@Kashmirhouseplans]

@@darrensamir4580 haha bot failure 😂 Where is your 2nd bot

[@AkibJahangirChoudhury]

There is always a process my dear. In order to get a particular value or equation it’s essential to understand various aspects. Like we need to play with these equations to understand better.

[@hwk99]

Sir Darcy weisbaxk formula app na glat bola ha 4 mis kiya ha means h = 4lv²/d×2g

[@govindmurari1234]

Next video Ka wait kr rha hu sir Thanks sir

[@study_hub658]

17:47 its D^2 in hagen poiselius equation .

[@bhanupratapmishraregularba9226]

ln Darcy weisbach equation first we asume that flow is stedy then how can its possible also use for 'Turbulent Flow'. Please clearing the Doubt

[@Cryptic_Chai]

laminar flow can be either steady or unsteady Strictly speaking, turbulent flow is always inherently unsteady since it involves random irregular rapid variations of the fluid flow properties w.r.t time, owing to inertial disturbing forces. But Turbulent flows CAN, nevertheless, BE TREATED as statistically steady turbulent flow (only in statistical sense, that the mean flow features do not vary over time) and statistically unsteady turbulent flow(mean flow features do vary over time) Although turbulent flow is inherently random and unsteady, the mean flow can be steady or unsteady. In conclusion, turbulent flow is inherently unsteady flow however in statistical sense it can be treated either steady or unsteady. [Credits: Sasank Komarla, CFD analyst in aero engine secondary flows. Originally Answered on Quora: What is difference between unsteady or non-steady flow of a fluid and turbulent flow of a fluid?]

[@the_blue_dot]

At 8:24 it should be per unit velocity square.

[@jaseem7]

Yeah. I have the same doubt. But in the FLuid mechanics text book by Dr RK Bansal it is written like in the video.

[@c.rcreation8403]

Great videos

[@durgeshpandey6294]

Your are the best best teacher

[@kathanpatel6862]

Excellent

[@ashvineeverma603]

Sir, chemical engineering fluid mechanics ke liye kise kya kru

[@kunalnanaware1221]

sir you are best

[@efathhasanshapin1468]

Koi help karo yaar, Eqn.(4 flv2/ 2gd) hoga ya (flv2/2gd)?

[@AnilThakur-dq7ex]

Excellent👌👌👌

[@sujeetmehta4939]

I become your fan....... sir......

[@deepankartiwari3747]

Thank you sir 2 din se wait kr raha tha sir if possible please finish fluid mechanics ASAP

[@artistic-v8411]

Deepankar tiwari schedule is very busy I will try my best

[@lavkumargupta1143]

there is a difference between bernoulli's eqn (ideal fluid flow) and energy eqn (real fluid flow )

[@jaypatel7632]

Wonderful✨😍..

[@amnamajid7095]

Thanks alot it's real help ful🥺❤️

[@roshanrewane7125]

Best ..keep up the good work

[@ashishyadav1035]

All the best wishes for you sir...

[@harisai2813]

finally clear

[@mdaadilashraf1299]

Sir is your lecture are also for diploma semester exam

[@gorlegovind8173]

Sir please tell to Ranjan sir to add videos about ac analysis and magnetic effect of electrical current

[@saurabhkumarsherathiya8353]

What a great effort

[@pravingaikwad1337]

For laminar flow frictional resistance is proportional to V and for turbulent it is proportional to V raised to n so while deriving we have considered resistance proportional to V raised to n then how is this equation valid for laminar flow?

[@KaranSingh-vz1ey]

Sir where is van karman momentum equation

[@KapilPCECE-gu5cr]

Sir I have an doubt regarding to properties of Fluid part 2, the problem is mentioned in the comment box of part 2 of Fluid property. And I'm start watching your videos from 2-3 days. I like your teaching very much...

[@maliwad01]

Thank you sir❤🙏

[@shivanandrao472]

Thanks lot 👍👍

[@ashishyadav1035]

Thanks for excellent clean concept....

[@yampradhan8344]

Very nice v lecture and keen to next video of open chennel flow

[@qadeemullahkhan8070]

Why we are not using nikurade diagram instead of moody chart????? Plz reply must if you have any information

[@aniketmitra2209]

sir you are saying that the flow is turbulent in this case means it is unsteady then how can you apply bernoullis equation

[@PavanKumar-if8sm]

Sir yeh btaiye jo Hazen William formula or Hagen poiseall equation ek hee hota hai ya. Different

[@अपरिचितयोद्धा]

I like your way to teach respected sir

[@ashutoshyadav5927]

The hydrostatic pressure on dam depend upon ? (a) depth (b) shape (c) both

[@artistic-v8411]

Ashutosh Yadav it depends on both...See the video on curved surface in fluid statics...

[@ashutoshyadav5927]

@@artistic-v8411 sir hydrostatic pressure is pgh only . Then why include area ?

[@ashutoshyadav5927]

Hydrostatic force depend upon both . In curve surface hydrostatic force consider

[@1079harry]

Directly Pressure depends on unit weight of water and depth , but indirectly it depends on area also because ultimately unit weight of water and depth will depend on area

[@enolA539]

Laminar = 4000

[@prateektiwari6330]

Sharma ji Reynold number ki value For Turbulent flow > 4000 hoti hai ...

[@prasannakumar-je4ur]

It will be turbulent flow......😌

[@mdimranahmed5621]

sir please tell when u will start fluid mechinary

[@tahsinsayednihad6456]

Thanks a lot sir... You are very helpful

[@naveenkumargujjar8923]

Thank-you sir

[@sagarmane2190]

Re greater than 4000 = turbulent flow

[@Huzur-Suhana]

True ... Statement by him is incorrect. Re should be > 4000 for turbulent flow.

[@jyotishsahoo9557]

Bro if Re is greater then 2000 or 2100 it is usually turbulent flow

[@dakshrajsingh2060]

f' is frictional resistance per unit area per unit velocity but in calculation of f' you multiplied by v^2. Plz explain.

[@sumeetgaming109]

2nd assumtion m likha h v^n aur n vary karta h (1.5 to 2)

[@csecure6157]

super lectures.thanks a lot

[@shubhamgurav9194]

Thanks a lot sir 👍👌🙏❤️🔥😎

[@Suraj-eq9og]

Sir mechanical ka Sara course krwa dijiye acha explain krte ho ap

[@paryantshah1141]

Nice !!

[@saurabhdubey7693]

thank you so much sir for this lecture....nicely explained........ thanks to gate academy team

[@aaqibmehraj4339]

THANK YOU VERY MUCH

[@bekind7211]

Sir continuity equation real fluid ke liye kese use Kari Wo to ideal fluid k liye hoti h Apne Darcy weisbach eq m kese use kri Please explain sir please

[@hafeezappi7403]

Iam here after money Hiest 😁❤️

[@HarwinderSingh-gp4oo]

sir turbulant flow when re is more then 4000 not 2000

[@enolA539]

Laminar = 4000

[@yogeshsaroha2162]

Come after money heist

[@nileshkushwaha6901]

Sir ji f=64/Re h toh..Re mein toh average velocity hooti h.... But sir ji..yr derivation Bernaulli theorem se hua h jisme v avg ka concept nhinh koi...!!... ??

[@college6531]

Question:- why p2 is taken in opposite direction..

[@mvthought_]

Thank you so much sir

[@sagardamani6934]

Turbulent flow me rough pipe smooth pipe consider karte he for friction factor to laminar flow me kyu nai karte ???

[@shankarkumarmahato2466]

Sir altitude Z ky hai

[@rajhedau3437]

When to multiply by 4 in major loss formula And When to Not multiply by 4

[@1079harry]

Friction factor= 4 × friction coefficient f = 4 f' f= 64/Re or f' = 16/ Re Both gives the same answer of head loss, if u apply any one of it...

[@rajhedau3437]

@@1079harry Thank u very much

[@faisalsid-qe4xn]

​@@1079harry thanks bro 🙃 may God bless u

[@round2hellshort25]

sir please gate related question ki qantity increse ker do sir. because more practice of questions is most important for to reade after cosept.

[@Huzur-Suhana]

Re should be > 4000 for turbulent flow. Please correct it.

[@subrataJokes]

Thank u sir, please update a vedio for overall heat transfer coefficient of shell&tube type heat exchangers... Plz sir upload it

[@katariyadhaval5576]

Please give formula regarding discharge in Darcy eqution

[@KurapatiSaiKalyan]

Who come after listening this equation in Money Heist.

[@durgeshpandey6294]

Nice sir

[@ishaan7328]

5:00

[@prat6125]

how can a flow be steady and turbulent at the same time

[@ankushverma450]

Thanku sir

[@manojkumarmalwa3423]

Nice

[@tinkuji4040]

fully developed laminar flow kya hota hai

[@artistic-v8411]

Abishek Kumar when velocity profile doesn't changes along the flow

[@usman3872]

lve you thanks your lecture

[@AMITKUMAR-jw4zn]

thank yyou sir

[@anjalipandey4220]

Why p2 is in opp to P1 plz explain

[@nits266]

Sir can we use Darcy's equation for calculating head loss in compressed air piping

[@mk123ify]

no darcy euation is for incompressible fuids only

[@kotibhaskar3884]

Sir, what is the physical defination of HEAD???

[@MANPREETSINGH-xv3vy]

Energy

[@lookatthisss2]

Energy lost per unit weight

[@pankajbhagat3142]

Why we take f'/rho = f/2

[@saurabhdhiman5837]

You forgot to tell that flow is uniform and steady so the both convective + local acceleration is zero in case of fluid

[@rockvilles3800]

You are excellent teacher in my whole life

[@Mahesnayak24]

Please sir study on prandtl mixing length on turbulent shear, velocity profile in turbulent flow, relationship between shear stresses and coefficient of friction, variation of friction factor ,also hydrodynamically smooth and rough surface.After this solve previous year gate question please on this topic sir.

[@artistic-v8411]

maheswar nayak video ho chuka hai upload bhi ho jaega

[@Mahesnayak24]

Ok sir.

[@pritoshtomar2769]

Why f'/ rho = Cf/2 ???

[@rudrashiva7496]

Hello bro why we had substituted f/2 in place of f'/density

[@rudrashiva7496]

Please reply as soon as possible

[@lookatthisss2]

@@rudrashiva7496 f'/(density) = Cf/2 ( thats assumption/experimentally obtained value for coeff of friction ) Cf = f/4 So f'/(density) = f/8 ( not f/2 )

[@1079harry]

Because experimentally observed that both the values are same

[@vivekmittal4497]

can you increase your duration up to 1 hour

[@artistic-v8411]

VIVEK MITTAL ok

[@vivekmittal4497]

thanks a lot

[@mdimranahmed5621]

respected sir why u use reynold no. with respect to diameter to find whether it is turbulent or laminar .why not u use length because in ques. it is not given that water flows along dia.

[@sagardamani6934]

Actually in question it is mentioned pipe flow And pipes having circular cross section so instead of taking along length we will take dia as characteristic length Hope u get it

[@manjuyadav3830]

Sir equation of energy in viscous fluid m bi bata do

[@AshutoshKumar-mz5bp]

Sir f'/ro×g= f/2 kyuu late hai Plz sir give me any comment for this doubt.

[@BBD_Baagh]

Why n=2?

[@kisanvishwakarma1480]

12.35 why f'/rho = f/2 Please explain me

[@pratibhakumari6290]

सर अगला विडियो.....

[@kapildevsoni99]

How Darcy's equation is independent of pressure(its assumption)?

[@yassershaikh9899]

The equation is actually based on the fact that as the velocity increases, the velocity gradient goes on increasing and the viscous force(or viscous action) causes the loss in energy(known as frictional loss) which is calculated as the loss in head. This is also one of the reasons why sir mentioned to use the haigen poiseuille's equation for a fully developed flow

[@saurabhdhiman5837]

There is a main assumption which is the flow is steady and uniform which is not mentioned in the starting of laminar flow topic , because of the assumption velocity assumed to stay constant throughout the section but friction come into play bcz fluid is not ideal and change in friction across the section is equal to the change in pressure across the length , as it is a navier stokes theorem friction is the only force that cause loss.

[@maitreypriyanshu6637]

Sir diploma students ke liye bhi video banaiye

[@BBD_Baagh]

Chutiya 😂

[@pandurangwaghmare8423]

In hagen poisuillies eqn. D^2

[@Praveenkumar-zy5sw]

Moody diagram kya hota h

[@subhangijaneya5767]

Sar aapka market thoda feka hai sahi se dikhta nahin hai board per

[@akshaybabu303]

awesome🔥

[@brillientskillsfan4212]

>4000 i.e turbulent ..how can u said it >2000 called turbulent

[@ShivamMishra14812]

Main iss video ko dekhne sirf isliye aaya hu kyunki iss equation ka jikr money heist series me Palermo ne kiya tha Kya koi or bhi aisa h jo iss video ko dekh same reason ki wjah se

[@satnereshwarmahadev]

Sir dhire Kyu ni padhate

[@bairigopal2579]

Sir please upload lectures about waste water engineering in civil department and other subjects also if it is possible Or If it is not possible please send the best link for other subjects

[@al-amin2825]

Is friction factor Coefficient and friction factor same??

[@lookatthisss2]

Cf = coeff of friction factor, f = friction faction f = 4 x Cf