Civil Engineering - Hydraulics - Discussion

Discussion Forum : Hydraulics - Section 4 (Q.No. 47)
47.
For the two dimensional flow, the stream function is given by ψ = 2xy. The velocity at a point (3, 4) is
6 m/sec
8 m/sec
10 m/sec
12 m/sec
15 m/sec.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
15 comments Page 2 of 2.

Yatu said:   7 years ago
How it's become 10?

Nayan said:   8 years ago
Differentiate the stream function with X and Y and get value of u and v.

Arya said:   8 years ago
How will find velocity. I got the value of u & v?

Uday said:   8 years ago
How it will?

Please explain briefly.

Mahendra said:   1 decade ago
u = dy/dx = 2y = 2*4 = 8.
v = dy/dy = 2x = 2*3 = 6.
|v| = (8^2+6^2)^1/2 = 10.


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