[Trilinos-Users] [EXTERNAL] Re: Mesh and DOF management with trilinos

[Cyr, Eric C]

Yes, that is how that was structured. Please feel free to communicate more questions as they arise.

Eric

From: Dharmendar Reddy <dharmareddy84 at gmail.com<mailto:dharmareddy84 at gmail.com>>
Date: Tuesday, February 16, 2016 at 4:18 PM
To: "Cyr, Eric C" <eccyr at sandia.gov<mailto:eccyr at sandia.gov>>
Cc: "Salinger, Andrew" <agsalin at sandia.gov<mailto:agsalin at sandia.gov>>, "trilinos-users at trilinos.org<mailto:trilinos-users at trilinos.org>" <trilinos-users at trilinos.org<mailto:trilinos-users at trilinos.org>>, Roger Pawlowski <rppawlo at sandia.gov<mailto:rppawlo at sandia.gov>>
Subject: Re: [EXTERNAL] Re: [Trilinos-Users] Mesh and DOF management with trilinos

Hello Eric,

Sure, i will need loads of help. Will be an upheal task for me given that i am new to C++ and new to trilinos. My test setup will be very similar to this paper but a one-D pn junction diode simulation to begin with.
"A new Control Volume Finite Element Method for the stable and accurate solution of the drift-diffusion equations on general unstructured grids"

Looks like they have used panzer and you may be familiar with the setup.

Thanks

Reddy




On Tue, Feb 16, 2016 at 4:39 PM, Cyr, Eric C <eccyr at sandia.gov<mailto:eccyr at sandia.gov>> wrote:
Reddy

I think probably the best place to start with panzer is in panzer/adapters-stk/example directory. This is certainly a non-trivial effort. I can get you set up with configure files but unfortunately the mesh database most readily accessible from panzer in STKClassic (an older version of STK). Though we have done a lot of work with it and so far hasn't really been our restriction (time is our restriction). There are different parts of panzer, so you can always use it in a more piecemeal way. Please feel free to communicate as needed so you can understand if these are the pieces you'd like to use.

Eric

From: Dharmendar Reddy <dharmareddy84 at gmail.com<mailto:dharmareddy84 at gmail.com>>
Date: Tuesday, February 16, 2016 at 3:15 PM
To: "Salinger, Andrew" <agsalin at sandia.gov<mailto:agsalin at sandia.gov>>, "trilinos-users at trilinos.org<mailto:trilinos-users at trilinos.org>" <trilinos-users at trilinos.org<mailto:trilinos-users at trilinos.org>>

Subject: [EXTERNAL] Re: [Trilinos-Users] Mesh and DOF management with trilinos

Hello Andrew,
                       Just went through the slides at https://trilinos.org/oldsite/events/trilinos_user_group_2011/presentations/PawlowskiCyr_TUG_Panzer_2011_10_v3.pdf
Looks cool to me. I would like to give it a shot. Is there an example code ?

I am trying to setup a code for quantum transport simulation in semiconductor device.


Thanks
Reddy











On Tue, Feb 16, 2016 at 3:25 PM, Salinger, Andrew <agsalin at sandia.gov<mailto:agsalin at sandia.gov>> wrote:

Reddy,

There are a few finite element codes built on Trilinos that do the steps
you are talking about. Several use the library panzer, which is part of
Trilinos. Others are in the separate application code Albany (gahansen/Albany
on github). These may be difficult to pick up without some help, but could
at least provide blocks of working code to examine as you move beyond the
example problems.

Andy

From: Trilinos-Users <trilinos-users-bounces at trilinos.org<mailto:trilinos-users-bounces at trilinos.org>> on behalf of Dharmendar Reddy <dharmareddy84 at gmail.com<mailto:dharmareddy84 at gmail.com>>
Date: Tuesday, February 16, 2016 at 1:18 PM
To: juan <juan at tf.uni-kiel.de<mailto:juan at tf.uni-kiel.de>>, "trilinos-users at trilinos.org<mailto:trilinos-users at trilinos.org>" <trilinos-users at trilinos.org<mailto:trilinos-users at trilinos.org>>
Subject: [EXTERNAL] Re: [Trilinos-Users] Mesh and DOF management with trilinos

Thanks for the example. Looks like what i need. Is there a  documentation for STK  and seacas ? The doxygen links on trilinos website do not work for stk.



Reddy

On Tue, Feb 16, 2016 at 1:40 PM, juan <juan at tf.uni-kiel.de<mailto:juan at tf.uni-kiel.de>> wrote:
You can use STK for reading the mesh (it is very convenient with the new STK Ioss interface from SEACAS) and then use Epetra/Tpetra maps. This is presented in the following example

https://github.com/trilinos/Trilinos/blob/master/packages/trilinoscouplings/examples/scaling/example_Poisson_stk.cpp

There is also a FE assembly with Intrepid (which is compatible to Intrepid2) in the example if you plan to use that.


On 2016-02-16 19:41, Dharmendar Reddy wrote:
Hello All,
               I am planing to switch my code from Fortran+petsc to
C++ and trilinos. I have an FEM code which uses petsc DMPlex
(http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/DM/DMPLEX.html)


Is there anything similar to DMPlex object in any of the trilinos
packages which can help me manage the mesh, DOF, setup and assembly of
the operators.

I would like to readin a mesh in exodus format into the mesh handler
and then use to help setup the operators, DOF variables etc.

Reddy

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