Another way is explained here https://lists.mcs.anl.gov/pipermail/petsc-users/2019-May/038519.html <https://lists.mcs.anl.gov/pipermail/petsc-users/2019-May/038519.html>
Best praveen > On 03-Dec-2020, at 6:21 PM, Praveen C <[email protected]> wrote: > > We have used this in our code, though I did not implement it, so I dont know > the details. > > Here is sample code > > > // get gmsh boundary tag > PetscInt bdry_tag; > ierr = DMGetLabelValue(dm, "Face Sets", face_no, &bdry_tag); > CHKERRQ(ierr); > > Best > praveen
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