[firedrake] Problem with nonlinear solver on extruded mesh

[Anna Kalogirou]

I haven't updated after the new year, so that might be it. Thanks!

Anna.


On 04/03/15 18:14, Andrew McRae wrote:
> Is your Firedrake completely up-to-date?
>
> It sounds not-unrelated to 
> https://github.com/firedrakeproject/firedrake/issues/472, which was 
> fixed recently.
>
> On 4 March 2015 at 18:09, Anna Kalogirou <a.kalogirou at leeds.ac.uk 
> <mailto:a.kalogirou at leeds.ac.uk>> wrote:
>
>     Dear all,
>
>     I am experiencing a problem with extruded meshes. When I try to solve
>     the nonlinear VP:
>
>     m = IntervalMesh(N,L)
>     mesh = ExtrudedMesh(m, layers=10)
>
>     F = ( v*(p1-p0)/dt + v*(h0-1) + sigma*inner(grad(v),grad(h0)) +
>     0.5*inner(grad(p0_5),grad(p0_5))*v )*dx + E_t*v*ds_v(1)
>
>     I get the error
>
>     File
>     "/opt/firedrake/2.0/lib/python2.7/site-packages/firedrake/variational_solver.py",
>     line 97, in __init__
>      form_compiler_parameters=self._problem.form_compiler_parameters)
>        File
>     "/opt/firedrake/2.0/lib/python2.7/site-packages/firedrake/assemble.py",
>     line 58, in assemble
>          form_compiler_parameters=form_compiler_parameters)
>        File
>     "/opt/firedrake/2.0/lib/python2.7/site-packages/firedrake/assemble.py",
>     line 79, in _assemble
>          kernels = ffc_interface.compile_form(f, "form",
>     parameters=form_compiler_parameters)
>        File
>     "/opt/firedrake/2.0/lib/python2.7/site-packages/firedrake/ffc_interface.py",
>     line 273, in compile_form
>          ((kernel, needs_orientations), ) = ffc_kernel.kernels
>     ValueError: need more than 0 values to unpack
>
>     However, this problem does not arise when I switch to a
>     RectangleMesh (
>     and change the ds_v(1) to ds(1) ), OR when I solve the corresponding
>     linear VP.
>     Anyone has any ideas why this is happening?
>
>     Thank you.
>
>     Best, Anna.
>
>     _______________________________________________
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>     firedrake at imperial.ac.uk <mailto:firedrake at imperial.ac.uk>
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>
>

-- 
  
  Dr Anna Kalogirou
  Research Fellow
  School of Mathematics
  University of Leeds

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