from where u will get friction factor 'f' in darcy's formula?
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Answer / karthik
for laminar flow f= 64/Re
for turbulent flow f is obtained from the moody diagram
using Re and the relative roughness of the pipe.
the relative roughness can be obtained by using the relation
relative roughness = absolute roughness/inside diameter of
the pipe.
Re means Reynolds number
Is This Answer Correct ? | 11 Yes | 2 No |
Answer / prince ali
Hf=(f'L V^2)/2gD
Where F' is the friction factor and
f'=4f,
where f= darcy coefficient
Is This Answer Correct ? | 10 Yes | 1 No |
Answer / suhel khan
since darcy's formula=4f'lv^2/2gd
here,f' is the coefficient of friction ,and friction factor
(f)=4f'.
value of f' can be obtained by following realtion,
for Re<2000,f'=16/RE
FOR Re VARYING FROM 4000-10^5,f'=0.079/Re^(1/4)
where Re=reynold's number
Is This Answer Correct ? | 7 Yes | 0 No |
f gets depend upon the type of bend
Is This Answer Correct ? | 3 Yes | 6 No |
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