boundary condition between porous and fluid zones

Mansureh · September 4, 2010, 05:00

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

xrs333 · September 4, 2010, 10:48

Hi, Mansureh,
Using boundary condition type interior or interface for the interface between the two zones is OK.

Mansureh · September 5, 2010, 03:27

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

cactilio86 · September 13, 2010, 09:42

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

Mansureh · September 14, 2010, 08:16

Hi cactilio86

thanks for your help.

javadshahbazi · June 5, 2011, 10:31

Quote:

Originally Posted by cactilio86

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?

September 4, 2010, 05:00	boundary condition between porous and fluid zones	#1
Mansureh New Member Join Date: Jul 2010 Posts: 22 Rep Power: 16	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

September 13, 2010, 09:42		#4
cactilio86 New Member Join Date: Mar 2009 Posts: 11 Rep Power: 17	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 javadshahbazi likes this.

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September 4, 2010, 10:48		#2
xrs333 Senior Member xrs333 Join Date: Aug 2010 Posts: 125 Rep Power: 17	Hi, Mansureh, Using boundary condition type interior or interface for the interface between the two zones is OK.

September 5, 2010, 03:27		#3
Mansureh New Member Join Date: Jul 2010 Posts: 22 Rep Power: 16	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

September 14, 2010, 08:16		#5
Mansureh New Member Join Date: Jul 2010 Posts: 22 Rep Power: 16	Hi cactilio86 thanks for your help.