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3d and 2d-axisymmetric at the same time?

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Old   August 4, 2005, 19:37
Default 3d and 2d-axisymmetric at the same time?
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Mike
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Does anyone know if it is possible to model part of a geometry in 3d and part in 2d axisymmetric?

Thanks,

Mike
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Old   August 5, 2005, 08:08
Default Re: 3d and 2d-axisymmetric at the same time?
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Jason
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I've done something similar in the past. The way I handled it was to create the 3d geometry and mesh. Then I saved a copy of the file, and I deleted the volume (make sure to turn off "lower geometry" option in the delete volume window) and the faces I didn't need. Actually, I deleted the volume mesh (with the "unused lower geometry" option off) first, that way it left the surface mesh on the surface I was going to keep, then I deleted the volume and the extra faces.

Hope this helps, and good luck, Jason
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Old   August 5, 2005, 22:13
Default Re: 3d and 2d-axisymmetric at the same time?
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Mike
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What I have is a crucible of roating liquid in a cylindrical chamber full of gas. I want to model the liquid in the crucible as 3-d, and the gas as 2-d axi-symmetric. If possible, the gas should interact with liquid. I've seen research codes that can accomplish this. Is this possible in Fluent?

Thanks,

Mike
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Old   August 8, 2005, 08:35
Default Re: 3d and 2d-axisymmetric at the same time?
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Jason
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Oh. Didn't realize what you were hoping to accomplish. This is not a feature in Fluent.

Sorry, Jason
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Old   August 9, 2005, 03:20
Default Re: 3d and 2d-axisymmetric at the same time?
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Ralf Schmidt
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you may split your simulation in two parts. First simulate the gas as 2d with a "black box" acting as your crucible. Therefore you need some idea, what kind of effect the crucible has on your gas.

In the next step, take the results of the 2d gas simulation, transform them into 3d and use as starting condition for the crucible 3d simulation. After finish simulating this one, take the results as starting condition for a new 2d gas simulation.

And so on and so on... Iterativ fitting both parts together.

Hope, this helps

Ralf
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