Good Morning Sir, I am a bit confused about the formula. 1. You are saying it is f=16/Re. But i have seen in other places, it is f= 64/Re. 2. Some uses the hf= 4fLV2/2gD. Others dont use 4. Why is that? And which one should we consider?
U should use F=4f As (F ) is fraction factor And( f ) is coefficient of friction If in question if they are given friction factor at that time u should use F not f
He is presenting the Fanning friction factor (f) which is 1/4 the magnitude of the Darcy-Weisbach friction factor (Cf). DW friction factor is 64/Re and Fanning is 16/Re. They are equivalent but you must know which factor you're using to get the correct head loss. Darcy Weisbach head loss is Δh =Cf*L*v^2/(2gD). Using Fanning factor Δh = 4f*Lv^2/(2gD)
explain please ... for the same in velocity the ratio of head loss per unit length for the pipe flowing full to that of the same pipe flowing half full would be ?
As per my knowledge if we are using (4flv^2/2gd) -- f = darcy's coefficient But where f= friction factor the same eqn will be (flv^2/2gd) or also may form as (flv^2/2g.4m) Also would like to add where f=friction factor =64/Rn & where f=coefficient of friction =16/Rn Please rectify me if I'm wrong!
Hi there. Please make vedio for this example.i want send water from point (1) to point (2). The point 1 is tank in mountain which elevation is 180 meter. The point 2 is tank which elevation is 75 meter. I want how to solve this problem ( friction loss and hight and size of pipe) because i want know is water come to tank 2 or not and i have pipe hdpe 3inch or 2 inch and distance is 14 km. Pleae make example on your board.
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came for the formula, stayed for the accent. love it :D
Hello, Sorry to interrupt ! At time 1:00, as per Darcy-Weisbach equation, Friction factor is 64/Re. Kindly confirm,
If f is fanning friction factor: f= 16/Re
If f is Darcy friction factor: f= 64/Re
In the video, f is in the form of fanning.
@@chedraemarledesma5875 but he mention Darcy weissbach rite?
@@NurIlmadienaEidirania right*
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Sir plecae shod
I want to know, when i use 4
And when i use without 4
Good Morning Sir, I am a bit confused about the formula.
1. You are saying it is f=16/Re. But i have seen in other places, it is f= 64/Re.
2. Some uses the hf= 4fLV2/2gD. Others dont use 4. Why is that? And which one should we consider?
U should use F=4f
As (F ) is fraction factor
And( f ) is coefficient of friction
If in question if they are given friction factor at that time u should use F not f
He is presenting the Fanning friction factor (f) which is 1/4 the magnitude of the Darcy-Weisbach friction factor (Cf). DW friction factor is 64/Re and Fanning is 16/Re. They are equivalent but you must know which factor you're using to get the correct head loss. Darcy Weisbach head loss is Δh =Cf*L*v^2/(2gD). Using Fanning factor Δh = 4f*Lv^2/(2gD)
@@duffharrold Thanks a lot brother.
explain please ... for the same in velocity the ratio of head loss per unit length for the pipe flowing full to that of the same pipe flowing half full would be ?
here f is friction coefficient
What is difference between Darcy and chezy formula
As per my knowledge if we are using (4flv^2/2gd) -- f = darcy's coefficient
But where f= friction factor the same eqn will be (flv^2/2gd) or also may form as (flv^2/2g.4m) Also would like to add where f=friction factor =64/Rn & where f=coefficient of friction =16/Rn
Please rectify me if I'm wrong!
he is correct lambda, the pipe friction factor is sometimes represented as 4f(early British practice) or f(American practice)
The original investigators presumed that the friction factor was constant. This was subsequently
found to be incorrect
If fanning friction factor is used, then I guess it's not Darcy-weisbach. Am i right?
are ghochu f is not frictional factor it is coefficient of friction
「コンテンツを調整する必要があります」、
darcy weisbach equation is fl(v square )/2gD and friction factor for laminar flow is 64/Re,
No bro in your case you have taken 4f as f so 4×f that is 4×16 =64
Hi there. Please make vedio for this example.i want send water from point (1) to point (2). The point 1 is tank in mountain which elevation is 180 meter. The point 2 is tank which elevation is 75 meter. I want how to solve this problem ( friction loss and hight and size of pipe) because i want know is water come to tank 2 or not and i have pipe hdpe 3inch or 2 inch and distance is 14 km.
Pleae make example on your board.
I guess Darcy formula is wrong, the 4 in numerator should not be there
Galat formula 😡😤😤😤
no factor