Mechanical Engineering Exam > Mechanical Engineering Questions > In the region of the boundary layer nearest t...
Start Learning for Free
In the region of the boundary layer nearest to the wall where velocityis not equal to zero, the viscous forces are:
- a)Of the same order of magnitude as the inertial forces
- b)More than inertial forces
- c)Less than inertial forces
- d)Negligible
Correct answer is option 'C'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
In the region of the boundary layer nearest to the wall where velocity...
Ans. (c) Reynold’s number = Inertia force / Viscous force and it is more than one therefore the viscous forces are less than inertial forces.
Most Upvoted Answer
In the region of the boundary layer nearest to the wall where velocity...
The viscous forces in the region of the boundary layer nearest to the wall where velocity is not equal to zero are less than inertial forces.
Explanation:
The boundary layer is a thin layer of fluid that forms along a solid surface when a fluid flows over it. In this region, the velocity of the fluid is not equal to zero, and there is a gradient in velocity from the wall to the outer flow.
Viscous forces:
- Viscous forces are the forces that arise due to the internal friction within a fluid.
- In the boundary layer, these forces are responsible for the transfer of momentum and energy between the fluid layers.
- Viscous forces are proportional to the velocity gradient in the flow, meaning that they increase with increasing velocity gradient.
- The velocity gradient is highest at the wall and decreases as we move away from it.
Inertial forces:
- Inertial forces are the forces that arise due to the inertia of the fluid particles.
- These forces are proportional to the density of the fluid and the square of the velocity of the fluid.
- Inertial forces dominate in regions where the fluid velocity is high and the density is significant.
Comparison:
- In the region of the boundary layer nearest to the wall, the velocity is relatively low compared to the outer flow.
- As a result, the inertial forces in this region are relatively low.
- On the other hand, the velocity gradient is high near the wall, leading to significant viscous forces.
- However, as we move away from the wall, the velocity gradient decreases, and the viscous forces also decrease.
- Consequently, the viscous forces in the region of the boundary layer nearest to the wall are less than the inertial forces.
Therefore, the correct answer is option 'C': Less than inertial forces.
Explanation:
The boundary layer is a thin layer of fluid that forms along a solid surface when a fluid flows over it. In this region, the velocity of the fluid is not equal to zero, and there is a gradient in velocity from the wall to the outer flow.
Viscous forces:
- Viscous forces are the forces that arise due to the internal friction within a fluid.
- In the boundary layer, these forces are responsible for the transfer of momentum and energy between the fluid layers.
- Viscous forces are proportional to the velocity gradient in the flow, meaning that they increase with increasing velocity gradient.
- The velocity gradient is highest at the wall and decreases as we move away from it.
Inertial forces:
- Inertial forces are the forces that arise due to the inertia of the fluid particles.
- These forces are proportional to the density of the fluid and the square of the velocity of the fluid.
- Inertial forces dominate in regions where the fluid velocity is high and the density is significant.
Comparison:
- In the region of the boundary layer nearest to the wall, the velocity is relatively low compared to the outer flow.
- As a result, the inertial forces in this region are relatively low.
- On the other hand, the velocity gradient is high near the wall, leading to significant viscous forces.
- However, as we move away from the wall, the velocity gradient decreases, and the viscous forces also decrease.
- Consequently, the viscous forces in the region of the boundary layer nearest to the wall are less than the inertial forces.
Therefore, the correct answer is option 'C': Less than inertial forces.
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
In the region of the boundary layer nearest to the wall where velocityis not equal to zero, the viscous forces are:a)Of the same order of magnitude as the inertial forcesb)More than inertial forcesc)Less than inertial forcesd)NegligibleCorrect answer is option 'C'. Can you explain this answer?
Question Description
In the region of the boundary layer nearest to the wall where velocityis not equal to zero, the viscous forces are:a)Of the same order of magnitude as the inertial forcesb)More than inertial forcesc)Less than inertial forcesd)NegligibleCorrect answer is option 'C'. 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 In the region of the boundary layer nearest to the wall where velocityis not equal to zero, the viscous forces are:a)Of the same order of magnitude as the inertial forcesb)More than inertial forcesc)Less than inertial forcesd)NegligibleCorrect answer is option 'C'. 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 In the region of the boundary layer nearest to the wall where velocityis not equal to zero, the viscous forces are:a)Of the same order of magnitude as the inertial forcesb)More than inertial forcesc)Less than inertial forcesd)NegligibleCorrect answer is option 'C'. Can you explain this answer?.
In the region of the boundary layer nearest to the wall where velocityis not equal to zero, the viscous forces are:a)Of the same order of magnitude as the inertial forcesb)More than inertial forcesc)Less than inertial forcesd)NegligibleCorrect answer is option 'C'. 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 In the region of the boundary layer nearest to the wall where velocityis not equal to zero, the viscous forces are:a)Of the same order of magnitude as the inertial forcesb)More than inertial forcesc)Less than inertial forcesd)NegligibleCorrect answer is option 'C'. 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 In the region of the boundary layer nearest to the wall where velocityis not equal to zero, the viscous forces are:a)Of the same order of magnitude as the inertial forcesb)More than inertial forcesc)Less than inertial forcesd)NegligibleCorrect answer is option 'C'. Can you explain this answer?.
Solutions for In the region of the boundary layer nearest to the wall where velocityis not equal to zero, the viscous forces are:a)Of the same order of magnitude as the inertial forcesb)More than inertial forcesc)Less than inertial forcesd)NegligibleCorrect answer is option 'C'. 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 In the region of the boundary layer nearest to the wall where velocityis not equal to zero, the viscous forces are:a)Of the same order of magnitude as the inertial forcesb)More than inertial forcesc)Less than inertial forcesd)NegligibleCorrect answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
In the region of the boundary layer nearest to the wall where velocityis not equal to zero, the viscous forces are:a)Of the same order of magnitude as the inertial forcesb)More than inertial forcesc)Less than inertial forcesd)NegligibleCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for In the region of the boundary layer nearest to the wall where velocityis not equal to zero, the viscous forces are:a)Of the same order of magnitude as the inertial forcesb)More than inertial forcesc)Less than inertial forcesd)NegligibleCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of In the region of the boundary layer nearest to the wall where velocityis not equal to zero, the viscous forces are:a)Of the same order of magnitude as the inertial forcesb)More than inertial forcesc)Less than inertial forcesd)NegligibleCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice In the region of the boundary layer nearest to the wall where velocityis not equal to zero, the viscous forces are:a)Of the same order of magnitude as the inertial forcesb)More than inertial forcesc)Less than inertial forcesd)NegligibleCorrect answer is option 'C'. 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