[Dune] how to specify a periodic grid in DGF in 3D ?

[Martin Nolte]

yes.

On 05/20/2011 11:56 AM, Benedikt Oswald wrote:
> Dear Dune,  I have generated a mesh of a hexahedron
> 
> with dimensions: lx = 200; ly = 300; lz = 400
> 
> with periodic boundaries in x,y and z direction, i.e. the boundary
> surfaces in x, y and z directions consist of congruent triangles.
> 
> 
> I am now confronted with the problem of telling ALUGrid<tetrahedral simplex>
> that the mesh in the DGF file is indeed periodic so that ALUGrid can wrap around
> the mesh.
> 
> In the documentation I have found instructions as:
> 
> *PeriodicFaceTransformation* 
> Each line describes an affine transformation that shall be used to glue grid
> boundaries together. The transformation is denoted as /matrix/ + /shift/. The
> following 2d example describes a shift by the first unit vector:
> 
>   1 0, 0 1 + 1 0
> 
> 
> 
> Thus, I would write something like:
> 
> 
> *PeriodicFaceTransformation*
> *1 0 0, 0 1 0, 0 0 1 + 200  0     0*
> **1 0 0, 0 1 0, 0 0 1 + 0     300**
> ***1 0 0, 0 1 0, 0 0 1 + 0     0     400***
> ***
> ***
> ***to tell ALUGrid that I have periodicities:***
> ***
> ***
> ***200 in x direction***
> ***300 in y direction***
> ***400 in z direction ***
> ***
> ***
> ***?***
> ***
> ***
> ***Thanks and have a great day! Benedikt***
> ***
> ***
> 
> 
> 
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------
> Benedikt Oswald, Dr. sc. techn., dipl. El. Ing. ETH, www.psi.ch
> <http://www.psi.ch>, Computational Accelerator Scientist, http://amas.web.psi.ch
> Paul Scherrer  Institute (PSI), CH-5232 Villigen, Suisse,
> benedikt.oswald at psi.ch <mailto:benedikt.oswald at psi.ch>, +41(0)56 310 32 12
> 
> "Passion is required for any great work, and for the revolution passion and
> audacity are required in big doses.",
>  Ernesto 'Che' Guevara, Letter to his parents.
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------
> 
> 
> 
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-- 
Martin Nolte <nolte at mathematik.uni-freiburg.de>

Universität Freiburg                                   phone: +49-761-203-5630
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