Mechanical Engineering - Hydraulics and Fluid Mechanics - Discussion
Discussion Forum : Hydraulics and Fluid Mechanics - Section 7 (Q.No. 3)
3.
According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)
Discussion:
36 comments Page 1 of 4.
Virupaksha said:
8 years ago
Answer [A] is correct. Because in the question ' f ' is mentioned as Darcy's coefficient/ Darcy's friction factor which is named after the Frenchmen Henry Darcy. It should not be confused with the friction coefficient/ Fanning friction factor, named after American engineer John Fanning. If ' f ' is given as Fanning friction factor then answer D is correct.
Kajal Patil said:
5 years ago
Answer D is correct.
Because they clearly mentioned f is Darcy's coefficient.
If they metion f' as a friction factor, then only Answer A will be correct.
Because.
f' = 4f.
Because they clearly mentioned f is Darcy's coefficient.
If they metion f' as a friction factor, then only Answer A will be correct.
Because.
f' = 4f.
Praveen tiwari said:
6 years ago
A is right because friction factor is 4times greater than the coefficient of friction and here in question coefficient of friction given so A is right.
Vin said:
6 years ago
Both A and D are correct as f in both the cases known as Darcy coefficient or coefficient of friction.
And both the formula introduced by Darcy only.
And both the formula introduced by Darcy only.
Sourabh said:
7 years ago
I think option D is the correct answer because where the diameter is considered. While area consider then it will be option A.
Arun B Kumar said:
1 decade ago
Answer D is correct if the "f" denotes friction coefficient. And Answer: A is correct if "f" denotes the friction factor.
MARGHUB said:
8 years ago
I think answer [D] will be correct.
According to R.S. Khurmi clearly written f=Darcyes coefficient.
According to R.S. Khurmi clearly written f=Darcyes coefficient.
Siraj (NMIT) said:
5 years ago
The correct one is D. 4flv^2/2gd
According to Darcys or Weisbach equation on major energy loss.
According to Darcys or Weisbach equation on major energy loss.
Moin said:
4 years ago
And D is Right, Because 4f- Darcy Coefficient if f- Friction Factor.
Then answer A right.
Then answer A right.
Salahuddin said:
7 years ago
A is the correct one.
Darcy friction factor is four times fanning friction factor.
Darcy friction factor is four times fanning friction factor.
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