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The flow in a rectangular channel is subcritical. If width of the channel is reduced at a certain section, the water surface under no–choke condition will
- a)Drop at a downstream section
- b)Rise at a downstream section
- c)Rise at an upstream section
- d)Not undergo any change
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
The flow in a rectangular channel is subcritical. If width of the chan...
In the subcritical region of flow for a given specific energy, as the discharge per unit width q is increased due to reducing width at the section, the depth of flow will decrease.
Therefore the water surface drops at a downstream section.
Alternately
∴ q1 > q2
From the discharge diagram, it can be seen that, for subcritical flow as q increases, depth decreases.
Therefore at the reduced section, depth decreases.
Most Upvoted Answer
The flow in a rectangular channel is subcritical. If width of the chan...
N-uniform flow conditions will:
When the width of a rectangular channel is reduced at a certain section, the water surface under non-uniform flow conditions will rise. This is because the continuity equation states that the product of velocity and area must remain constant along the length of the channel. Therefore, when the width is reduced, the velocity must increase to maintain the same discharge. This increase in velocity will cause a rise in the water surface. Additionally, the reduction in width can also cause an increase in turbulence and flow resistance, further contributing to the rise in water surface.
When the width of a rectangular channel is reduced at a certain section, the water surface under non-uniform flow conditions will rise. This is because the continuity equation states that the product of velocity and area must remain constant along the length of the channel. Therefore, when the width is reduced, the velocity must increase to maintain the same discharge. This increase in velocity will cause a rise in the water surface. Additionally, the reduction in width can also cause an increase in turbulence and flow resistance, further contributing to the rise in water surface.
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The flow in a rectangular channel is subcritical. If width of the channel is reduced at a certain section, the water surface under no–choke condition willa)Drop at a downstream sectionb)Rise at a downstream sectionc)Rise at an upstream sectiond)Not undergo any changeCorrect answer is option 'A'. Can you explain this answer?
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The flow in a rectangular channel is subcritical. If width of the channel is reduced at a certain section, the water surface under no–choke condition willa)Drop at a downstream sectionb)Rise at a downstream sectionc)Rise at an upstream sectiond)Not undergo any changeCorrect answer is option 'A'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about The flow in a rectangular channel is subcritical. If width of the channel is reduced at a certain section, the water surface under no–choke condition willa)Drop at a downstream sectionb)Rise at a downstream sectionc)Rise at an upstream sectiond)Not undergo any changeCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The flow in a rectangular channel is subcritical. If width of the channel is reduced at a certain section, the water surface under no–choke condition willa)Drop at a downstream sectionb)Rise at a downstream sectionc)Rise at an upstream sectiond)Not undergo any changeCorrect answer is option 'A'. Can you explain this answer?.
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