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Cylinder placed in atmosphere

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Old   February 17, 2016, 21:37
Default Cylinder placed in atmosphere
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Hello,

I am a new user and I had a problem solving one of the multiphase dispersion problems in Workbench.
I have a cylinder with a hole (leak) on one end which is placed in an atmospheric enclosure. The cylinder is carrying supercritical CO2. I want to study the dispersion of supercritical CO2 from that leak into the atmosphere. I created a solid pipe first and then extruded (cut) a smaller cylinder on one end through this pipe (which represents the leak) and placed it in a rectangular box which was created by extruding and selecting frozen retaining both the geometries. Then I created a Boolean and subtracted those two entities.
After creating named selections and meshing the surface, I am trying to set up the model in Fluent. I want to give 2 inlets here- one for the inlet atmosphere and one for inlet through the pipe. But Fluent sets the default BC of the pipe inlet to 'interface'.
I wanted some help on how the geometry for this kind of a problem should be created so that I can give two fluid BCs-one for air and the other for pipe.

Thank you in advance.
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boundaries condition, geometry, pipe

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