On Fri, Oct 5, 2018 at 6:49 PM Manuel Valera <mvaler...@sdsu.edu> wrote:
> Hello, > > I'm trying to do a simple variable interpolation, from a cell center to a > face in a staggered grid, my model data management is done with DMDAs, with > two different DMs one for each cell position, > > I already did this task on a fortran only version of the model using the 4 > closest neighbors of the scalars (cell center) to be interpolated at the > velocity site (cell face), i did it using a loop over the domain, somehow > this easy task is not translating into the DMDA framework, > Its not clear to me what problem you are having. We have done this before. For example, https://www.mcs.anl.gov/petsc/petsc-current/src/snes/examples/tutorials/ex30.c.html I would note that the development version of PETSc now has DMStag which supports staggered grid discretizations directly. Thanks, Matt > I'm not sure what I'm doing wrong or not aware of a easier way Petsc may > have for this task, if you could point out an easier strategy or an example > I would be grateful, > > Thanks, > > > > > -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
