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how to connect faces(only one adjacent cell thread

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Old   July 12, 2005, 16:48
Default how to connect faces(only one adjacent cell thread
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BC
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Hello, all Thanks for reading my question! For some reason, I need to define the interface between two volumes as "Porous Jump", but it gave me a wrong message indicating "Only one adjacent cell thread.." I guess this is becasue I have different faces for the interface between these two volumes. (Face A for volume 1 and Face B,C,D for volume 2). I tried to connect the faces but it couldn't be connected, anyone can help me?

PS. Face A is equivalent to Face B + Face C + Face D
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Old   July 13, 2005, 07:22
Default Re: how to connect faces(only one adjacent cell th
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Jason
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You have to have coincident edges/vertices to be able to connect faces. So what you have to do is split Face A so that it's not made up of 3 faces that match up with B, C, and D. If you don't mind going virtual (or are already virtual), you can split Face A with the edges of Faces B, C, and D.

Good luck, Jaosn
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Old   July 13, 2005, 11:27
Default Re: how to connect faces(only one adjacent cell th
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BC
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Thanks so much, Jason Looks like I have a new problem in meshing the volume if I split the face of the volume into three.Here is the graph.

https://webspace.utexas.edu/chens50/fluent/Example.jpg

The porous jump is between green and yellow volumes. The yellow volume has a red serpentine channel in it (attached to the interface). After I split the interface, I had hard time meshing the green volume. Any idea to solve it?! Please.
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Old   July 13, 2005, 14:44
Default Re: how to connect faces(only one adjacent cell th
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Jason
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What exactly is the problem you are having meshing the green volume?

By the way, that's a great candidate for a structured mesh! Mesh your faces first, all of them with quad mesh (using the map scheme) and then mesh the volumes.

Jason
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Old   July 13, 2005, 15:10
Default Re: how to connect faces(only one adjacent cell th
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BC
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Sorry, let me make the question more clear. I need to mesh the green volume which has a face that is required to be split (the interface). Everytime I try to mesh the green volume, it just didn't work. any trick to do it? Thanks!
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Old   July 13, 2005, 15:45
Default Re: how to connect faces(only one adjacent cell th
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BC
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By the way, the error message says: "A fatal error has occurred. It is not possible for Gambit to continue from this point. Please report this error immediately..." Is this happening becasue I didn't use the right way to mesh the green volume?
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Old   July 13, 2005, 15:47
Default Re: how to connect faces(only one adjacent cell th
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Jason
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That's still not much of a description of the problem... how were you trying to mesh it (tet or quad elements, did you mesh the faces first, are you using sizing functions?), and what exactly went wrong that it "didn't work"? Was there an error message, and if so what was the message?

Jason
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Old   July 13, 2005, 15:51
Default Re: how to connect faces(only one adjacent cell th
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Jason
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Lol... sorry, I was typing the other message as you posted this.

Fatal Error can mean just about anything. Usually it means there's a problem with the geometry though. You might want to go back over how you created the geometry. Look for edges that are really close together, but aren't colinear, that type of thing. It doesn't look like there's any complicated surfaces, all the geometry seems to be orthogonal planes, so it should be a simple problem. Are you working with imported geometry, or did you create all of the geometry within Gambit?

Jason
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Old   July 13, 2005, 16:07
Default Re: how to connect faces(only one adjacent cell th
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BC
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Thanks so much, Jason I just figured out that I need to mesh all the faces first before I mesh the volume. Now, the problem was solved. Thanks for your help!
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