[Getdp] Pyramids not working ?

Thomas Jung Thomas.Jung at iisb.fraunhofer.de
Fri Jul 28 14:01:24 CEST 2006


On Friday 28 July 2006 11:46, Kubicek Bernhard wrote:
> Sorry, I just found out that I only replied to single persons, instead of
> the whole mailling-list:
>
> ---mail1---
> for scalar, node attached Dofs pyramid cells seem to work, with my #define
> line .. I prepared some nice "proof" images:
>
> http://wiki.kariert.org/index.php/GetDP
>
> nice greetings,
> Bernhard
>
> ---mail2---
> I am using Pyramidal cells, however i had to enable them in the source
> code: file include/GetDP.h add a line containing #define NEW_PYRAMIDS
>
> However I did not verify 100% wether the calculations then are really
> correct. Still, i found the same line as you: { GeoElement Pyramid  ;
> NumberOfPoints  8 ; } But I am still wondering how a pyramid can have 8
> points...
>
> nice greetings, hope it works.
> Bernhard Kubicek
>
> -----Ursprüngliche Nachricht-----
> Von: getdp-bounces at geuz.org [mailto:getdp-bounces at geuz.org] Im Auftrag von
> Ruth V. Sabariego Gesendet: Freitag, 28. Juli 2006 10:15
> An: Thomas Jung
> Cc: getdp at geuz.org
> Betreff: Re: [Getdp] Pyramids not working ?
>
>
> Indeed, it is not yet implemented. You are using BF_Edge for {a}, what
> makes BF_CurlEdge for {d a}.
> For the time being, your mesh should contained either only hexahedrons
> or only tetrahedrons.
>
> Ruth
>
> Thomas Jung wrote:
> >Hi,
> >
> >I am using a 3D a-v-formulation, up to now I used only tetrahedrons,
> >and
> >everything was fine.
> >I have a different grid now, containing also hexahedrons and pyramids, and
> > get the message:
> >
> >===========================================================
> >P r e - P r o c e s s i n g . . .
> >Operation : Treatment Formulation 'MagnetoDynamics_a_3D'
> >Info      :   Generate ExtendedGroup '_CO_Entity_14' (EdgesOf)
> >Info      :   Generate ExtendedGroup '_CO_Entity_15' (EdgesOfTreeIn)
> >Info      :   Generate ExtendedGroup '_CO_Entity_11' (NodesOf)
> >Info      :   Generate ExtendedGroup '_CO_Entity_12' (NodesOf)
> >Resources : cpu 2.02813 s
> >E n d   P r e - P r o c e s s i n g
> >P r o c e s s i n g . . .
> >Operation : Generate[A2]
> >Solver    : Loading parameter file 'solver.par'
> >Info      : Setting System {A,b} to zero
> >Error     : Unkown type of Element in BF_CurlEdge
> >
> >============================================================
> >
> >Here are the Integration, Functionspace, and formulation:
> >
> >Integration {
> >    { Name CurlCurl ;
> >    Case { {Type Gauss ;
> >    Case { { GeoElement Triangle    ; NumberOfPoints  4 ; }
> >    { GeoElement Quadrangle  ; NumberOfPoints  4 ; }
> >    { GeoElement Tetrahedron ; NumberOfPoints  4 ; }
> >    { GeoElement Hexahedron  ; NumberOfPoints  6 ; }
> >    { GeoElement Prism       ; NumberOfPoints  9 ; }
> >    { GeoElement Pyramid     ; NumberOfPoints  8 ; } }
> >    }
> >    }
> >}
> >}
> >
> >FunctionSpace {
> >  { Name v_Ele; Type Form0;
> >    BasisFunction {
> >      { Name sn; NameOfCoef vn; Function BF_Node;
> >        Support DomainC_Mag; Entity NodesOf[ All ]; }
> >    }
> >    Constraint {
> >      { NameOfCoef vn; EntityType NodesOf;
> >        NameOfConstraint ElectricScalarPotential; }
> >    }
> >  }
> >
> >  // Magnetic vector potential a (b = curl a)
> >  { Name Hcurl_a_Mag_3D; Type Form1;
> >    BasisFunction {
> >	{ Name se; NameOfCoef ae; Function BF_Edge;
> >        Support Domain_Mag; Entity EdgesOf[ All ]; }
> >    }
> >    Constraint {
> >	{ NameOfCoef ae; EntityType EdgesOf;NameOfConstraint a; }
> >	{ NameOfCoef ae; EntityType EdgesOfTreeIn; EntitySubType StartingOn;
> >NameOfConstraint Gauge; }
> >    }
> >  }
> >
> >}
> >
> >Formulation {
> >
> >  { Name MagnetoDynamics_a_3D; Type FemEquation;
> >    Quantity {
> >      { Name a ; Type Local; NameOfSpace Hcurl_a_Mag_3D; }
> >      { Name v; Type Local; NameOfSpace v_Ele; }
> >    }
> >    Equation {
> >	Galerkin { [ nu[] * Dof{d a} , {d a} ]; In Domain_Mag; Jacobian Vol;
> >Integration CurlCurl; }
> >
> >	Galerkin { DtDof [ sigma[] * Dof{a} , {a} ]; In DomainC_Mag; Jacobian
> >Vol;
> >Integration CurlCurl; }
> >
> >	Galerkin { [ sigma[] * Dof{d v} , {a} ]; In DomainC_Mag; Jacobian Vol;
> >Integration CurlCurl; }
> >
> >	Galerkin { DtDof [ sigma[] * Dof{a} , {d v} ]; In DomainC_Mag;	Jacobian
> > Vol; Integration CurlCurl; }
> >
> >	Galerkin { [ sigma[] * Dof{d v} , {d v} ]; In DomainC_Mag; Jacobian
> >Vol;
> >Integration CurlCurl; }
> >
> >
> >    }
> >  }
> >
> >}
> >
> >
> >
> >Thank you very much for any hint !
> >
> >
> >
> > Thomas Jung
> >_______________________________________________
> >getdp mailing list
> >getdp at geuz.org
> >http://www.geuz.org/mailman/listinfo/getdp


Thank you, Bernhard !

adding this #define NEW_PYRAMIDS works also for vector potential, apparently.
Have not yet verified completely, but get very reasonably looking results




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