Mechanical Engineering - Hydraulics and Fluid Mechanics - Discussion
Discussion Forum : Hydraulics and Fluid Mechanics - Section 1 (Q.No. 25)
25.
The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place, is (where RN = Reynold number)
Discussion:
22 comments Page 1 of 3.
Jeet said:
1 decade ago
There is a mistake here, its not loss of head, its expression for coefficient of friction.
Naidu said:
1 decade ago
For friction loss in laminar flow f=64/Re.
Please verify it.
Please verify it.
Bharat said:
1 decade ago
You are right my friend.
The equation is 4f = 64/Re.
The equation is 4f = 64/Re.
Ravi said:
1 decade ago
@Bharat.
Its Only f=64/Re.
Not 4f.
Its Only f=64/Re.
Not 4f.
CHITTARANJAN KARMI said:
1 decade ago
4f = 64/Re.
=>f=16/Re answer.
=>f=16/Re answer.
Vaibav said:
1 decade ago
Its depend on the "f" value, if it is nearly equal to 0.01, it would be f.
Or if it is nearly 0.0001, it would be "4f".
Or if it is nearly 0.0001, it would be "4f".
Napster said:
1 decade ago
f=16/Re is the expression for the entry length of a fully developed flow.
Bks said:
1 decade ago
If friction factor is asked then 64/Re.
If coefficient of friction is asked then 16/Re.
If coefficient of friction is asked then 16/Re.
Saikumar said:
1 decade ago
If the value of the friction factor is 0.064, then the Darcy friction factor is plotted in the Moody diagram. Note that the nonzero digits in 0.064 are the numerator in the formula for the laminar.
Darcy friction factor: fD = 64/Re.
If the value of the friction factor is 0.016, then the Fanning friction factor is plotted in the Moody diagram. Note that the nonzero digits in 0.016 are the numerator in the formula for the laminar.
Fanning friction factor: f = 16/Re.
Darcy friction factor: fD = 64/Re.
If the value of the friction factor is 0.016, then the Fanning friction factor is plotted in the Moody diagram. Note that the nonzero digits in 0.016 are the numerator in the formula for the laminar.
Fanning friction factor: f = 16/Re.
Ranjit said:
1 decade ago
Coefficient of friction (f) = 16/Re.
Friction factor = 64/Re.
Friction factor = 64/Re.
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