[kandelabr]

If I write, for instance, a 0/p file like this:

outlet { type fixedValue; ... }
".*" { type zeroGradient; ... }

I am never sure which boundary condition will be assigned to outlet because .* is also a match.

Does OpenFOAM assign the first matching patch name or the last?

Thanks!

[alexeym]

Hi,

Since boundaryField is a dictionary, first entry lookup is performed by keyword and then, if it was not found, lookup is repeated with regEx (https://github.com/OpenFOAM/OpenFOAM...tionary.C#L469). So outlet in general should become fixedValue, and everything else zeroGradient.

[kandelabr]

Thanks for the reply. I thought this was so but wasn't really sure. Also the code explains everything but is hard to find the right line.