Issue Creating Circular Mesh with Gmsh2D

[JDS19]

Hello,

I am trying to make some 2D simulations, and I need to create a circular mesh, so I'm following the instructions from https://www.ctcms.nist.gov/fipy/examples/diffusion/generated/examples.diffusion.circle.html .

However, when I try to make the mesh as shown in the example, I get "KeyError: 'cellSize'". My code is:

from fipy import Variable, FaceVariable, CellVariable, Grid1D, TransientTerm, DiffusionTerm, Viewer, Gmsh2D
radius = 0.1 
diam = 2*radius

# Create mesh 
nx = 100
cellSize = diam/nx

mesh = Gmsh2D('''
              cellSize = %(cellSize)g;
              radius = %(radius)g;
              Point(1) = {0, 0, 0, cellSize};
              Point(2) = {-radius, 0, 0, cellSize};
              Point(3) = {0, radius, 0, cellSize};
              Point(4) = {radius, 0, 0, cellSize};
              Point(5) = {0, -radius, 0, cellSize};
              Circle(6) = {2, 1, 3};
              Circle(7) = {3, 1, 4};
              Circle(8) = {4, 1, 5};
              Circle(9) = {5, 1, 2};
              Line Loop(10) = {6, 7, 8, 9};
              Plane Surface(11) = {10};
              ''' % locals()) 

I am using Python version 3.8.3 and Fipy version 3.4.3.

Thank you for any help!

[JDS19]

I think there was an issue with how I had Gmsh imported. I messed around with where Gmsh is stored, and it seems to work now. I apologize for the confusion.

[guyer]

Glad you got it to work