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Which one of the following is the characteristic of a fully developed laminar flow?
- a)The pressure drop in the flow direction is zero
- b)The velocity profile changes uniformly in the flow direction
- c)The velocity profile does not change in the flow direction
- d)The Reynolds number for the flow is critical
Correct answer is option 'C'. Can you explain this answer?
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Characteristics of fully developed laminar flow:
Fully developed laminar flow refers to a situation where the flow characteristics do not change with respect to distance along the flow direction. It is characterized by the following:
1. Velocity profile: In fully developed laminar flow, the velocity profile remains constant along the flow direction. This means that the velocity distribution across the flow section remains the same at any given point in time.
2. Pressure drop: There is a constant pressure drop along the flow direction in fully developed laminar flow. This is due to the frictional resistance of the fluid against the walls of the pipe or channel.
3. Reynolds number: The Reynolds number for fully developed laminar flow is less than 2300. This means that the flow is relatively slow, and the viscous forces dominate over the inertial forces.
4. Symmetry: Fully developed laminar flow is symmetric about the centerline of the pipe or channel. This means that the flow is the same at any given point in time in any cross-sectional plane.
Answer explanation:
Option C - The velocity profile does not change in the flow direction - is the correct answer because fully developed laminar flow is characterized by a constant velocity profile along the flow direction. The other options are incorrect because pressure drop does occur in fully developed laminar flow, the velocity profile does not change uniformly in the flow direction, and the Reynolds number for fully developed laminar flow is less than 2300, not critical.
Fully developed laminar flow refers to a situation where the flow characteristics do not change with respect to distance along the flow direction. It is characterized by the following:
1. Velocity profile: In fully developed laminar flow, the velocity profile remains constant along the flow direction. This means that the velocity distribution across the flow section remains the same at any given point in time.
2. Pressure drop: There is a constant pressure drop along the flow direction in fully developed laminar flow. This is due to the frictional resistance of the fluid against the walls of the pipe or channel.
3. Reynolds number: The Reynolds number for fully developed laminar flow is less than 2300. This means that the flow is relatively slow, and the viscous forces dominate over the inertial forces.
4. Symmetry: Fully developed laminar flow is symmetric about the centerline of the pipe or channel. This means that the flow is the same at any given point in time in any cross-sectional plane.
Answer explanation:
Option C - The velocity profile does not change in the flow direction - is the correct answer because fully developed laminar flow is characterized by a constant velocity profile along the flow direction. The other options are incorrect because pressure drop does occur in fully developed laminar flow, the velocity profile does not change uniformly in the flow direction, and the Reynolds number for fully developed laminar flow is less than 2300, not critical.
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Which one of the following is the characteristic of a fully developed laminar flow?a)The pressure drop in the flow direction is zerob)The velocity profile changes uniformly in the flow directionc)The velocity profile does not change in the flow directiond)The Reynolds number for the flow is criticalCorrect answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Which one of the following is the characteristic of a fully developed laminar flow?a)The pressure drop in the flow direction is zerob)The velocity profile changes uniformly in the flow directionc)The velocity profile does not change in the flow directiond)The Reynolds number for the flow is criticalCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following is the characteristic of a fully developed laminar flow?a)The pressure drop in the flow direction is zerob)The velocity profile changes uniformly in the flow directionc)The velocity profile does not change in the flow directiond)The Reynolds number for the flow is criticalCorrect answer is option 'C'. Can you explain this answer?.
Which one of the following is the characteristic of a fully developed laminar flow?a)The pressure drop in the flow direction is zerob)The velocity profile changes uniformly in the flow directionc)The velocity profile does not change in the flow directiond)The Reynolds number for the flow is criticalCorrect answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Which one of the following is the characteristic of a fully developed laminar flow?a)The pressure drop in the flow direction is zerob)The velocity profile changes uniformly in the flow directionc)The velocity profile does not change in the flow directiond)The Reynolds number for the flow is criticalCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following is the characteristic of a fully developed laminar flow?a)The pressure drop in the flow direction is zerob)The velocity profile changes uniformly in the flow directionc)The velocity profile does not change in the flow directiond)The Reynolds number for the flow is criticalCorrect answer is option 'C'. Can you explain this answer?.
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Which one of the following is the characteristic of a fully developed laminar flow?a)The pressure drop in the flow direction is zerob)The velocity profile changes uniformly in the flow directionc)The velocity profile does not change in the flow directiond)The Reynolds number for the flow is criticalCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Which one of the following is the characteristic of a fully developed laminar flow?a)The pressure drop in the flow direction is zerob)The velocity profile changes uniformly in the flow directionc)The velocity profile does not change in the flow directiond)The Reynolds number for the flow is criticalCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Which one of the following is the characteristic of a fully developed laminar flow?a)The pressure drop in the flow direction is zerob)The velocity profile changes uniformly in the flow directionc)The velocity profile does not change in the flow directiond)The Reynolds number for the flow is criticalCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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