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Old   August 7, 2013, 14:12
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Duranin
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Yes, this is exactly what I want.

I thought I'd tried two opening using SBC-'outflow with backflows' but it gave an opposite flow against the physics. Perhaps I did something wrong; I will go through your model carefully to see if there are something I missed.

Thanks so much for your kindly help!
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Originally Posted by hellorishi View Post
Just copied the BC settings from upper opening to lower and its working.

https://docs.google.com/file/d/0B9k4...it?usp=sharing

Is this something similar to what you expect?
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Old   August 8, 2013, 09:51
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This model has hydrostatic pressure setting enabled at both outlets.
Also a steady state solution was used a initial value for transit run.
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Old   August 8, 2013, 19:54
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This hydrostatic pressure is interesting. Actually I've tried to apply a p*g*h pressure on lower opening. I thought the it is too sensitive to impact the results since for air p*g*h is so small and also it is not practical if I have some openings that are not parallel to the reference. Now it makes sense.

I have used SC-Tetra before and it seems that SCT will automatically take into account for hydrostatic pressure.

Thanks a lot for your help
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Old   August 12, 2013, 03:01
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Some notes about Hydrostatic Pressure from the AcuSolve Command Reference Manual:

"If gravitational force is modeled using the GRAVITY command, then hydrostatic_pressure=on should be set for most pressure or stagnation pressure boundary conditions in order to properly account for the hydrostatic pressure. This is most commonly needed on outflow boundaries."
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Old   August 22, 2013, 11:01
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Just a quick question about this simulation. Were you able to see mass conservation between the inlet and outlet? From the velocity vector plots, it looks like the velocities are much higher at the top than at the bottom. As i have not run this simulation, i have not taken a look at the results. My conclusions below are based on the plots you have shown.
As the mass flux over a surface area is (density x area x velocity), it does make sense that velocities are higher at the top. However the magnitude of difference between the inlet and outlet does not seem to match the expected difference in density.
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Old   August 22, 2013, 11:27
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Mass conservation was pretty good. See the screenshot of mass flux at those surfaces.

Since both the top and bottom were "open" boundaries and not specifically inlet or outlet, there are some regions at the top where there is mass coming into the box.
Attached Images
File Type: jpg mass_flux_balance.jpg (96.9 KB, 26 views)
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Old   February 24, 2014, 02:56
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How u are seeing the results in Acusolve.Do we have go for Post Processing tool?
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Old   February 25, 2014, 05:17
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Within the Hyperworks suite you can use Acufieldview or Hyperview.
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