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boundary condition between porous and fluid zones

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Old   September 4, 2010, 04:00
Post boundary condition between porous and fluid zones
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hi every body
I'm trying to model a porous media inside a cylinder, this cylinder is in contact with an annulus which is a fluid zone. what should be the proper boundary condition between this two zones.

thanks for any help
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Old   September 4, 2010, 09:48
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Hi, Mansureh,
Using boundary condition type interior or interface for the interface between the two zones is OK.
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Old   September 5, 2010, 02:27
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hi xrs333
thanks very much for your help. and could you tell me what the difference between interior and interfaceboundary conditions is? and can I use porous jump BC instead?

kind regards
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Old   September 13, 2010, 08:42
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Not really familiar with your case, but:

1. Interior is composed of only one surface. hence, its mesh is that of the surface itself.

2. Interface is composed of two surfaces - one IN and one OUT. The nice thing is that therefore the same physical surface contains two "model" surfaces and they can have different meshes. Interpolation between IN & OUT is used for the solution at that surface.

The interface is extremely useful to make your meshing problem easier. For instance, while coopering in a certain direction you might stumble upon another coopered mesh coming in the opossite direction of your model: and then you have the problem of making them compatible.

regards
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Old   September 14, 2010, 07:16
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Hi cactilio86

thanks for your help.
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Old   June 5, 2011, 09:31
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Quote:
Originally Posted by cactilio86 View Post
Not really familiar with your case, but:

1. Interior is composed of only one surface. hence, its mesh is that of the surface itself.

2. Interface is composed of two surfaces - one IN and one OUT. The nice thing is that therefore the same physical surface contains two "model" surfaces and they can have different meshes. Interpolation between IN & OUT is used for the solution at that surface.

The interface is extremely useful to make your meshing problem easier. For instance, while coopering in a certain direction you might stumble upon another coopered mesh coming in the opossite direction of your model: and then you have the problem of making them compatible.

regards
how can we get more information on this type of boundary conditions?
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