On Feb 27, 2013, at 5:24 PM, Carlos Acosta <bdm...@my.utsa.edu> wrote:
> Thank you very much. That was actually very helpful. I had to save the mesh
> as quad4 before importing it to libmesh.
>
> One thing that I found though is that libmesh is not reading the number of
> local nodes "n_local_nodes()=0". there for the number of degrees of freedom
> is zero.
> I am printing mesh info reading the .e file vs using
> MeshTools::Generation::build_square (...) and this is what I get.
>
> *****EXODUS OUTPUT*******
> Mesh Information:
> mesh_dimension()=2
> spatial_dimension()=3
> n_nodes()=121
> n_local_nodes()=0
> n_elem()=100
> n_local_elem()=0
> n_active_elem()=100
> n_subdomains()=1
> n_partitions()=1
> n_processors()=1
> n_threads()=1
> processor_id()=0
>
> EquationSystems
> n_systems()=1
> System #0, "Poisson"
> Type "LinearImplicit"
> Variables="u"
> Finite Element Types="LAGRANGE"
> Approximation Orders="FIRST"
> n_dofs()=0
> n_local_dofs()=0
> n_constrained_dofs()=0
> n_local_constrained_dofs()=0
> n_vectors()=1
> n_matrices()=1
> DofMap Sparsity
> Average On-Processor Bandwidth <= 0
> Average Off-Processor Bandwidth <= 0
> Maximum On-Processor Bandwidth <= 0
> Maximum Off-Processor Bandwidth <= 0
> DofMap Constraints
> Number of DoF Constraints = 0
> *******************
>
> vs.
>
> ****************mesh generation output******
> Mesh Information:
> mesh_dimension()=2
> spatial_dimension()=3
> n_nodes()=256
> n_local_nodes()=256
> n_elem()=225
> n_local_elem()=225
> n_active_elem()=225
> n_subdomains()=1
> n_partitions()=1
> n_processors()=1
> n_threads()=1
> processor_id()=0
>
> EquationSystems
> n_systems()=1
> System #0, "Poisson"
> Type "LinearImplicit"
> Variables="u"
> Finite Element Types="LAGRANGE"
> Approximation Orders="FIRST"
> n_dofs()=256
> n_local_dofs()=256
> n_constrained_dofs()=0
> n_local_constrained_dofs()=0
> n_vectors()=1
> n_matrices()=1
> DofMap Sparsity
> Average On-Processor Bandwidth <= 8.26562
> Average Off-Processor Bandwidth <= 0
> Maximum On-Processor Bandwidth <= 9
> Maximum Off-Processor Bandwidth <= 0
> DofMap Constraints
> Number of DoF Constraints = 0
> ************************************************
>
> Is there an extra step I need to do to read the exodus mesh???
Call mesh.prepare_for_use() maybe?
>
> Thank you in advance.
>
>
>
>
> On Wed, Feb 27, 2013 at 1:06 PM, John Peterson <jwpeter...@gmail.com> wrote:
>>
>>
>>
>>
>> On Feb 27, 2013, at 12:23 PM, "Paul T. Bauman" <ptbau...@gmail.com> wrote:
>>
>> > On Wed, Feb 27, 2013 at 11:51 AM, Carlos Acosta <bdm...@my.utsa.edu> wrote:
>> >
>> >> but when I import an exodus mesh I get errors
>> >> recognizing the exodus format.
>> >> It says:
>> >>
>> >>
>> >> ERROR! Unrecognized element type_str: SHELL4
>> >
>> > Hmm, this is strange because Exodus reader should understand SHELL4.
>>
>> But it doesn't quote work right: shell4's actually have six "sides" and so
>> some of our side id mapping stuff doesn't work. Definitely stick to
>> Quad4's. I think I will patch this to go back to making shell4 throw an
>> error, maybe something like "please export quad4 from cubit instead"...
>>
>>
>>
>> > Could
>> > you rerun with METHOD=dbg and see if an assert is tripped? How big is your
>> > mesh?
>>
>> It's possible he's using an old version, maybe a sourceforge SVN version?
>>
>>
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>
>
>
> --
>
> Carlos Acosta Berlinghieri
> Graduate Research Assistant
> Department of Biomedical Engineering Computational Center
> University of Texas at San Antonio
> (210)458-4680 (lab phone)
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