Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > In the case of fully developed flow through ...
Start Learning for Free
In the case of fully developed flow through tubes
- a)Darcy’s friction factor is four times the skin friction coefficient
- b)Darcy’s friction factor and skin friction coefficients are same
- c)Darcy’s friction factor is double the skin friction coefficient
- d)The skin friction coefficient is greater than the Darcy’s friction factor.
Correct answer is option 'A'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
In the case of fully developed flow through tubesa) Darcy’s friction ...
F = 4Cf
View all questions of this test
Most Upvoted Answer
In the case of fully developed flow through tubesa) Darcy’s friction ...
Fully developed flow through tubes refers to a flow situation where the velocity profile across the cross-section of a pipe or tube is fully established and remains constant along the length of the tube. In this case, the flow is considered to be fully developed and the frictional effects dominate the flow behavior. Darcy's friction factor and skin friction coefficient are two important parameters used to characterize the frictional losses in pipe flows.
Explanation:
Darcy's friction factor (f) is a dimensionless quantity that relates the pressure drop or head loss (ΔP) in a pipe to the flow rate (Q), pipe diameter (D), fluid density (ρ), and fluid viscosity (μ). It is given by the equation:
f = (2L/D) * (ρV^2)/(2g)
Where:
L is the length of the pipe
D is the diameter of the pipe
V is the average velocity of the fluid
g is the acceleration due to gravity
On the other hand, the skin friction coefficient (Cf) is also a dimensionless quantity that characterizes the frictional losses in pipe flows. It is defined as the ratio of the wall shear stress (τw) to the dynamic pressure (q) of the fluid. It is given by the equation:
Cf = τw / (0.5ρV^2)
Where:
τw is the wall shear stress
ρ is the fluid density
V is the average velocity of the fluid
Comparison:
In fully developed flow through tubes, the velocity profile is fully established, and the frictional losses dominate the flow behavior. In this case, the friction factor and skin friction coefficient can be related as follows:
f = 4Cf
This means that Darcy's friction factor is four times the skin friction coefficient. Therefore, the correct answer is option 'A'.
Explanation:
Darcy's friction factor (f) is a dimensionless quantity that relates the pressure drop or head loss (ΔP) in a pipe to the flow rate (Q), pipe diameter (D), fluid density (ρ), and fluid viscosity (μ). It is given by the equation:
f = (2L/D) * (ρV^2)/(2g)
Where:
L is the length of the pipe
D is the diameter of the pipe
V is the average velocity of the fluid
g is the acceleration due to gravity
On the other hand, the skin friction coefficient (Cf) is also a dimensionless quantity that characterizes the frictional losses in pipe flows. It is defined as the ratio of the wall shear stress (τw) to the dynamic pressure (q) of the fluid. It is given by the equation:
Cf = τw / (0.5ρV^2)
Where:
τw is the wall shear stress
ρ is the fluid density
V is the average velocity of the fluid
Comparison:
In fully developed flow through tubes, the velocity profile is fully established, and the frictional losses dominate the flow behavior. In this case, the friction factor and skin friction coefficient can be related as follows:
f = 4Cf
This means that Darcy's friction factor is four times the skin friction coefficient. Therefore, the correct answer is option 'A'.
Attention Civil Engineering (CE) Students!
To make sure you are not studying endlessly, EduRev has designed Civil Engineering (CE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Civil Engineering (CE).
|
Explore Courses for Civil Engineering (CE) exam
|
|
Top Courses for Civil Engineering (CE)View all
In the case of fully developed flow through tubesa) Darcy’s friction factor is four times the skin friction coefficientb) Darcy’s friction factor and skin friction coefficients are samec) Darcy’s friction factor is double the skin friction coefficientd) The skin friction coefficient is greater than the Darcy’s friction factor.Correct answer is option 'A'. Can you explain this answer?
Question Description
In the case of fully developed flow through tubesa) Darcy’s friction factor is four times the skin friction coefficientb) Darcy’s friction factor and skin friction coefficients are samec) Darcy’s friction factor is double the skin friction coefficientd) The skin friction coefficient is greater than the Darcy’s friction factor.Correct answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about In the case of fully developed flow through tubesa) Darcy’s friction factor is four times the skin friction coefficientb) Darcy’s friction factor and skin friction coefficients are samec) Darcy’s friction factor is double the skin friction coefficientd) The skin friction coefficient is greater than the Darcy’s friction factor.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the case of fully developed flow through tubesa) Darcy’s friction factor is four times the skin friction coefficientb) Darcy’s friction factor and skin friction coefficients are samec) Darcy’s friction factor is double the skin friction coefficientd) The skin friction coefficient is greater than the Darcy’s friction factor.Correct answer is option 'A'. Can you explain this answer?.
In the case of fully developed flow through tubesa) Darcy’s friction factor is four times the skin friction coefficientb) Darcy’s friction factor and skin friction coefficients are samec) Darcy’s friction factor is double the skin friction coefficientd) The skin friction coefficient is greater than the Darcy’s friction factor.Correct answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about In the case of fully developed flow through tubesa) Darcy’s friction factor is four times the skin friction coefficientb) Darcy’s friction factor and skin friction coefficients are samec) Darcy’s friction factor is double the skin friction coefficientd) The skin friction coefficient is greater than the Darcy’s friction factor.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the case of fully developed flow through tubesa) Darcy’s friction factor is four times the skin friction coefficientb) Darcy’s friction factor and skin friction coefficients are samec) Darcy’s friction factor is double the skin friction coefficientd) The skin friction coefficient is greater than the Darcy’s friction factor.Correct answer is option 'A'. Can you explain this answer?.
Solutions for In the case of fully developed flow through tubesa) Darcy’s friction factor is four times the skin friction coefficientb) Darcy’s friction factor and skin friction coefficients are samec) Darcy’s friction factor is double the skin friction coefficientd) The skin friction coefficient is greater than the Darcy’s friction factor.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Civil Engineering (CE).
Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free.
Here you can find the meaning of In the case of fully developed flow through tubesa) Darcy’s friction factor is four times the skin friction coefficientb) Darcy’s friction factor and skin friction coefficients are samec) Darcy’s friction factor is double the skin friction coefficientd) The skin friction coefficient is greater than the Darcy’s friction factor.Correct answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
In the case of fully developed flow through tubesa) Darcy’s friction factor is four times the skin friction coefficientb) Darcy’s friction factor and skin friction coefficients are samec) Darcy’s friction factor is double the skin friction coefficientd) The skin friction coefficient is greater than the Darcy’s friction factor.Correct answer is option 'A'. Can you explain this answer?, a detailed solution for In the case of fully developed flow through tubesa) Darcy’s friction factor is four times the skin friction coefficientb) Darcy’s friction factor and skin friction coefficients are samec) Darcy’s friction factor is double the skin friction coefficientd) The skin friction coefficient is greater than the Darcy’s friction factor.Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of In the case of fully developed flow through tubesa) Darcy’s friction factor is four times the skin friction coefficientb) Darcy’s friction factor and skin friction coefficients are samec) Darcy’s friction factor is double the skin friction coefficientd) The skin friction coefficient is greater than the Darcy’s friction factor.Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice In the case of fully developed flow through tubesa) Darcy’s friction factor is four times the skin friction coefficientb) Darcy’s friction factor and skin friction coefficients are samec) Darcy’s friction factor is double the skin friction coefficientd) The skin friction coefficient is greater than the Darcy’s friction factor.Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Civil Engineering (CE) tests.
|
|
Explore Courses for Civil Engineering (CE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup