Mechanical Engineering Exam > Mechanical Engineering Questions > The lower critical Reynold number for a pipe ...
Start Learning for Free
The lower critical Reynold number for a pipe flow is:
- a)Different for different fluids
- b)The Reynolds number at which the laminar flow changes to turbulent flow
- c)More than 2000
- d)The least Reynolds number ever obtained for laminar flow
Correct answer is option 'A'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
The lower critical Reynold number for a pipe flow is:a)Different for d...
Ans. (a) The Reynolds number at which the turbulent flow changes to laminar flow
is known as lower critical Reynolds number. The lower critical Reynolds number
for a pipe flow is different for different fluids.
is known as lower critical Reynolds number. The lower critical Reynolds number
for a pipe flow is different for different fluids.
Most Upvoted Answer
The lower critical Reynold number for a pipe flow is:a)Different for d...
Explanation:
Lower critical Reynold number is defined as the minimum value of Reynolds number at which the fluid flow changes from laminar to turbulent flow. However, for a pipe flow, the lower critical Reynolds number is different for different fluids.
Reasons:
- Nature of the fluid: The flow behavior of a fluid is primarily dependent on its viscosity and density. The lower critical Reynolds number is directly proportional to the viscosity of the fluid. Thus, fluids with higher viscosity will have a lower critical Reynolds number than fluids with lower viscosity.
- Pipe diameter: The lower critical Reynolds number also depends on the diameter of the pipe. For smaller pipe diameters, the viscous forces are dominant, and the fluid flow is more likely to be laminar. On the other hand, for larger pipe diameters, the inertial forces dominate, and the fluid flow is more likely to be turbulent.
- Surface roughness: The lower critical Reynolds number is also affected by the surface roughness of the pipe. A rougher surface will create more turbulence, and thus, the transition from laminar to turbulent flow will occur at a lower Reynolds number.
Conclusion:
Hence, it can be concluded that the lower critical Reynolds number for a pipe flow is different for different fluids and depends on various factors such as nature of the fluid, pipe diameter, and surface roughness.
Lower critical Reynold number is defined as the minimum value of Reynolds number at which the fluid flow changes from laminar to turbulent flow. However, for a pipe flow, the lower critical Reynolds number is different for different fluids.
Reasons:
- Nature of the fluid: The flow behavior of a fluid is primarily dependent on its viscosity and density. The lower critical Reynolds number is directly proportional to the viscosity of the fluid. Thus, fluids with higher viscosity will have a lower critical Reynolds number than fluids with lower viscosity.
- Pipe diameter: The lower critical Reynolds number also depends on the diameter of the pipe. For smaller pipe diameters, the viscous forces are dominant, and the fluid flow is more likely to be laminar. On the other hand, for larger pipe diameters, the inertial forces dominate, and the fluid flow is more likely to be turbulent.
- Surface roughness: The lower critical Reynolds number is also affected by the surface roughness of the pipe. A rougher surface will create more turbulence, and thus, the transition from laminar to turbulent flow will occur at a lower Reynolds number.
Conclusion:
Hence, it can be concluded that the lower critical Reynolds number for a pipe flow is different for different fluids and depends on various factors such as nature of the fluid, pipe diameter, and surface roughness.
Attention Mechanical Engineering Students!
To make sure you are not studying endlessly, EduRev has designed Mechanical Engineering study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Mechanical Engineering.
|
Explore Courses for Mechanical Engineering exam
|
|
Similar Mechanical Engineering Doubts
Top Courses for Mechanical EngineeringView all
The lower critical Reynold number for a pipe flow is:a)Different for different fluidsb)The Reynolds number at which the laminar flow changes to turbulent flowc)More than 2000d)The least Reynolds number ever obtained for laminar flowCorrect answer is option 'A'. Can you explain this answer?
Question Description
The lower critical Reynold number for a pipe flow is:a)Different for different fluidsb)The Reynolds number at which the laminar flow changes to turbulent flowc)More than 2000d)The least Reynolds number ever obtained for laminar flowCorrect answer is option 'A'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about The lower critical Reynold number for a pipe flow is:a)Different for different fluidsb)The Reynolds number at which the laminar flow changes to turbulent flowc)More than 2000d)The least Reynolds number ever obtained for laminar flowCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The lower critical Reynold number for a pipe flow is:a)Different for different fluidsb)The Reynolds number at which the laminar flow changes to turbulent flowc)More than 2000d)The least Reynolds number ever obtained for laminar flowCorrect answer is option 'A'. Can you explain this answer?.
The lower critical Reynold number for a pipe flow is:a)Different for different fluidsb)The Reynolds number at which the laminar flow changes to turbulent flowc)More than 2000d)The least Reynolds number ever obtained for laminar flowCorrect answer is option 'A'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about The lower critical Reynold number for a pipe flow is:a)Different for different fluidsb)The Reynolds number at which the laminar flow changes to turbulent flowc)More than 2000d)The least Reynolds number ever obtained for laminar flowCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The lower critical Reynold number for a pipe flow is:a)Different for different fluidsb)The Reynolds number at which the laminar flow changes to turbulent flowc)More than 2000d)The least Reynolds number ever obtained for laminar flowCorrect answer is option 'A'. Can you explain this answer?.
Solutions for The lower critical Reynold number for a pipe flow is:a)Different for different fluidsb)The Reynolds number at which the laminar flow changes to turbulent flowc)More than 2000d)The least Reynolds number ever obtained for laminar flowCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of The lower critical Reynold number for a pipe flow is:a)Different for different fluidsb)The Reynolds number at which the laminar flow changes to turbulent flowc)More than 2000d)The least Reynolds number ever obtained for laminar flowCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
The lower critical Reynold number for a pipe flow is:a)Different for different fluidsb)The Reynolds number at which the laminar flow changes to turbulent flowc)More than 2000d)The least Reynolds number ever obtained for laminar flowCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for The lower critical Reynold number for a pipe flow is:a)Different for different fluidsb)The Reynolds number at which the laminar flow changes to turbulent flowc)More than 2000d)The least Reynolds number ever obtained for laminar flowCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of The lower critical Reynold number for a pipe flow is:a)Different for different fluidsb)The Reynolds number at which the laminar flow changes to turbulent flowc)More than 2000d)The least Reynolds number ever obtained for laminar flowCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice The lower critical Reynold number for a pipe flow is:a)Different for different fluidsb)The Reynolds number at which the laminar flow changes to turbulent flowc)More than 2000d)The least Reynolds number ever obtained for laminar flowCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
|
|
Explore Courses for Mechanical Engineering 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