SkewedGrid2D is a defined thing in FiPy. GmshGrid2D and GmshGrid3D have a _meshSpacing property defined, but making a generic periodic mesh with Gmsh will not induce this.
> On Feb 7, 2018, at 12:07 PM, Sachin Kurian <sach...@vt.edu> wrote: > > Thank you. > I've tried using quad meshes from gmsh (I suppose this is what you meant by > skew grids), but the same error shows up. So, the problem is that > '_meshSpacing' is not an attribute for 'Gmsh2D' mesh if I define a > ModularVariable on that mesh. > > On Wed, Feb 7, 2018 at 11:49 AM, Guyer, Jonathan E. Dr. (Fed) > <jonathan.gu...@nist.gov> wrote: > _meshSpacing is only implemented for (square (including skew)) grids and only > used by the _ModCellGradVariable. It's apparently been like that since before > FiPy was FiPy, 14 years ago. > > I'll need to think about this more deeply to understand why normalizing by > grid spacing even makes sense, much less what the answer should be for a > general mesh. > > > > On Feb 6, 2018, at 7:17 PM, Sachin Kurian <sach...@vt.edu> wrote: > > > > Hi everyone, > > > > I've just started using FiPy. I'm particularely interested in the phase > > field problems. I tried the examples of solidification and grain > > impingement given in the documentation. What I intend to do is to use a > > non-rectangular domain with triangular mesh for the problem. After > > importing the unstructured mesh generated by gmsh, I assigned a > > ModularVariable (theta) to the cells (Similar to the grain impingement > > examples). Unfortunately, assigning a ModularVariable to the Gmsh2D() mesh > > throws an attribute error:'Gmsh2D' object has no attribute '_meshSpacing' > > when I use theta.grad.mag command or try solving the equation. > > What am I doing wrong here? Is it possible to model the grain impingement > > problem in a user defined geometry and mesh created using gmsh? Or is there > > any other approach in FiPy to achieve the same goal? > > I use windows platform, > > Python 2.7 > > FiPy 3.1.3. > > > > Thanks, > > > > -- > > Sachin Kurian > > > > _______________________________________________ > > fipy mailing list > > fipy@nist.gov > > http://www.ctcms.nist.gov/fipy > > [ NIST internal ONLY: https://email.nist.gov/mailman/listinfo/fipy ] > > > _______________________________________________ > fipy mailing list > fipy@nist.gov > http://www.ctcms.nist.gov/fipy > [ NIST internal ONLY: https://email.nist.gov/mailman/listinfo/fipy ] > > > > -- > Sachin Kurian > Graduate Student > Department of Mechanical Engineering > Virginia Tech > _______________________________________________ > fipy mailing list > fipy@nist.gov > http://www.ctcms.nist.gov/fipy > [ NIST internal ONLY: https://email.nist.gov/mailman/listinfo/fipy ] _______________________________________________ fipy mailing list fipy@nist.gov http://www.ctcms.nist.gov/fipy [ NIST internal ONLY: https://email.nist.gov/mailman/listinfo/fipy ]
