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A roughened thin board 25 cm wide 200 cm long moves at 3 m⁄s through water. The boundary layer is 5 cm thick on both sides at rear end of the board and the velocity distribution is prescribed by the relation:
Find the drag force in Newton.
Correct answer is 'Range: 29 to 31'. Can you explain this answer?
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A roughened thin board 25 cm wide 200 cm long moves at 3 m⁄s through ...
Recall that for an element strip of thickness dy, the loss in mass flow rate due to velocity defect (U0 − u) results in a momentum loss equal to ∫ ρub (U0 − u)dy for a unit width of the plate. Further, this momentum loss equals drag force on the plate. Thus for a plate of width b, drag force on one side of the plate is
= 2 /15 × 1000 × (3)2 × 0.25 × 0.05
= 15 N
Hence drag force on both sides of the plate is 30 N.
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A roughened thin board 25 cm wide 200 cm long moves at 3 m⁄s through ...
Recall that for an element strip of thickness dy, the loss in mass flow rate due to velocity defect (U0 − u) results in a momentum loss equal to ∫ ρub (U0 − u)dy for a unit width of the plate. Further, this momentum loss equals drag force on the plate. Thus for a plate of width b, drag force on one side of the plate is
= 2 /15 × 1000 × (3)2 × 0.25 × 0.05
= 15 N
Hence drag force on both sides of the plate is 30 N.
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A roughened thin board 25 cm wide 200 cm long moves at 3 m⁄s through water. The boundary layer is 5 cm thick on both sides at rear end of the board and the velocity distribution is prescribed by the relation:Find the drag force in Newton.Correct answer is 'Range: 29 to 31'. Can you explain this answer?
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A roughened thin board 25 cm wide 200 cm long moves at 3 m⁄s through water. The boundary layer is 5 cm thick on both sides at rear end of the board and the velocity distribution is prescribed by the relation:Find the drag force in Newton.Correct answer is 'Range: 29 to 31'. 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 A roughened thin board 25 cm wide 200 cm long moves at 3 m⁄s through water. The boundary layer is 5 cm thick on both sides at rear end of the board and the velocity distribution is prescribed by the relation:Find the drag force in Newton.Correct answer is 'Range: 29 to 31'. 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 A roughened thin board 25 cm wide 200 cm long moves at 3 m⁄s through water. The boundary layer is 5 cm thick on both sides at rear end of the board and the velocity distribution is prescribed by the relation:Find the drag force in Newton.Correct answer is 'Range: 29 to 31'. Can you explain this answer?.
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