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For the two dimensional flow, the stream functionis given by ψ =2xy. The velocity at a point (3,4) is
  • a)
    6m/sec
  • b)
    8 m/sec
  • c)
    10 m/sec
  • d)
    12 m/sec
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
For the two dimensional flow, the stream functionis given by ψ =2...
Solution:

Given, stream function, ψ = 2xy

The velocity components can be obtained as follows:

u = ∂ψ/∂y = 2x

v = -∂ψ/∂x = -2y

At the point (3,4), we have:

u = 2(3) = 6 m/s

v = -2(4) = -8 m/s

The magnitude of velocity is given by:

|V| = √(u² + v²)

|V| = √(6² + (-8)²)

|V| = √(36 + 64)

|V| = √100

|V| = 10 m/s

Therefore, the velocity at point (3,4) is 10 m/s. Hence, option C is the correct answer.
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For the two dimensional flow, the stream functionis given by ψ =2xy. The velocity at a point (3,4) isa)6m/secb)8 m/secc)10 m/secd)12 m/secCorrect answer is option 'C'. Can you explain this answer?
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