Dear Simone
On Tue, 25 Jun 2019 at 00:34, Simone Puel <spuel@utexas.edu> wrote:
>
> Hi all,
>
> My name is Simone Puel, a graduate student at the University of Texas at Austin. I think I have installed Firedrake correctly since I can run the example in the online tutorial. Thank you so much.
> I am trying to convert a script I made in FEniCS in Firedrake. I modified some syntax, but I have the following error:
>
[...]
> assert len(gsh) == 1
> AssertionError
>
>
> I made a very simple mesh in Gmsh (attached) and the script is the linear elasticity using a mixed formulation (Arnold et al., 2007). The problem is a 2D rectangle with a vertical fault where I prescribe 1 m of slip.
> I attached the mesh (.msh file) and the script.
> If anyone is able to help, I would appreciate it. Thank you so much in advance.
> Have a wonderful day!
This is, I think, I missing feature in the way UFL applies pullback to
certain elements. (I'm slightly surprised the fenics version works!).
This is my chance to ask a notational question. I recently put this in PETSc so I could see how everything worked,
and it looks like the operation here is to put tabulated reference values of the basis or test functions into real space
for a cell integral say. Isn't that operation the pushforward (adjoint of pullback). I use the pullback when I am mapping
back user function evals to evaluate the action of dual basis vectors. Am I misunderstanding the terminology?
Thanks,
Matt
In any case, I think I have a fix. Can you try with these changes in
UFL:
https://github.com/firedrakeproject/ufl/pull/18
And in Firedrake:
https://github.com/firedrakeproject/firedrake/pull/1466
Thanks,
Lawrence
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