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
Discussion:
15 comments Page 1 of 2.
Niki said:
1 year ago
2x = 2 * 3 = 6.
2y = 2 * 4 = 8.
√((6)^2 + (8)^2) = 10.
2y = 2 * 4 = 8.
√((6)^2 + (8)^2) = 10.
(5)
Apcivilian said:
4 years ago
You're absolutely right, Thanks @Deepankar.
Deepankar said:
4 years ago
@All.
U = -d(psi)/dy.
And, V= d(psi)/dx.
So that makes U = -6 and V = 8.
U = -d(psi)/dy.
And, V= d(psi)/dx.
So that makes U = -6 and V = 8.
Shehbaz said:
4 years ago
Thanks all.
Triguna sethi said:
5 years ago
U=dy/dx=2y=2*4=8.
V=dy/dy=2x=2*3=6.
Ivl=lv^+u^l=l8^+6^l=l64+36l^1/2=(100)^1/2= √(100)=10.
V=dy/dy=2x=2*3=6.
Ivl=lv^+u^l=l8^+6^l=l64+36l^1/2=(100)^1/2= √(100)=10.
Priyanka said:
5 years ago
Accurate and understandable explanation. Helpful when your have some doubt.
Thank you.
Thank you.
Srj said:
6 years ago
For Ψ=3xy velocity=2,3.
Diff w.r.t x=3y.
Diff w.r.t y=3x.
3*2=6,
3*3=9.
√(6^2+9^2)
√(36+81)
√117.
So, the Answer is.10.82.
Diff w.r.t x=3y.
Diff w.r.t y=3x.
3*2=6,
3*3=9.
√(6^2+9^2)
√(36+81)
√117.
So, the Answer is.10.82.
NILESHKUMAR Mali said:
6 years ago
D/DX=2y=2x4 = 8
D/Dy=2x=2x3 = 6.
Take under root=(√8^2+6^2)= √100=10M/sec.
D/Dy=2x=2x3 = 6.
Take under root=(√8^2+6^2)= √100=10M/sec.
Pawan said:
6 years ago
Thanks @Mahendra.
Anomiiee said:
7 years ago
Well said, Thanks @Mahendra.
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