[RugbyGandalf]

Dear Foam-Community,

i'd like to calculate the surface-area of the inlet-patch for a moving domain for every time step and write out the calculated value in a file in each time-folder.

For now i have the following code:

label inletPatchID = mesh.boundaryMesh().findPatchID("inlet"); 
    std::ofstream file("inlet_area.txt");
    file << gSum(mesh.magSf().boundaryField()[inletPatchID]) << std::endl;
    file.close();

But it only gives out a file in the case-directory (and overwrites it???)

Does anyone has any idea how to solve this?

Regards,
Martin