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Old   January 10, 2010, 10:53
Default transient flow
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Hello every one,

I am simulating a pipe flow.there are two inlets for this pipe.For one inlet flow velocity is independent of time,for another inlet flow velocity is varying with respect to time. For second inlet i am using transient boundary profile.
like this

(
(inlet point 72)
(time
0
1
2
.....
)
(
velocity
0
13.6
13.6
.....
0
0
...)
)

But after applying this boundary profile as boundary condition there is no flow in to the pipe.
I think the profile is not updating for each time step(means it is at first time step only 0 velocity).

And showing a waring there are no x,y,z velocities for inlet

I've stuck here for a long time i tried so many ways to overcome this problem and i am failed. So please give me any solution for this problem.
please.......

Thanks in advance.
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Old   January 11, 2010, 02:12
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Maxime Perelli
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If the velocity distribution on your inlet is constant, you should correct your second line, with:
(test transient 72 1) instead of (inlet point 72)
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Old   January 12, 2010, 01:53
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Thanks for u r reply max,

I will try with u r suggestion.
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Old   January 12, 2010, 03:15
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I also forgot to say that you have to modify the name "velocity" to "v_x" for velocity along x-axis (resp. v_y for y-axis and v_z for z-axis)
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