[spwater]

Hello:
Recently I am working on chtMultiRegionFoam and start with the planeWall2D case.

https://openfoamwiki.net/index.php/G..._-_planeWall2D

Though it won't work directly with the latest OF, it is still a good beginning to understand the structure of the case.
Here is my question, when I am looking at the system/bottomAir/changeDictionaryDict:
1, why is there a
boundary
{
bottomAir_bottom
{
type symmetryPlane;
}
}
at beginning? I see the defination repeated in all the following variable's defination, like U.

2, what does ".*" means, does that mean all solid boundary, or somethign else? As I see "bottomAir_to_.*" means baffles between bottomAir and solid region wall.

3, why there is no ".*" boundary in U but in p, and no "bottomAir_to_.*" boundary in p but in U?

yours

Pei