[Gmsh] Size fields question

[Grégory LEGRAIN]

So I missed something :-(
Sorry for disturbing, I remember now that I already saw this option in 
the past.

Thanks a lot,
Gregory

Le 22/11/2014 00:01, Jean-François Remacle a écrit :
> Hello,
>
> Just put
> Mesh.CharacteristicLengthExtendFromBoundary = 0;
>
> in the geo file.
>
> JF
>
>
> Le 21 nov. 2014 à 03:34, Grégory LEGRAIN <gregory.legrain at ec-nantes.fr 
> <mailto:gregory.legrain at ec-nantes.fr>> a écrit :
>
>> Dear gmsh developers/users,
>> I am playing with size fields, and I experienced some strange results...
>>
>> Consider the folllwing geo file :
>> lc = 1.e-2;
>>
>> Point(1) = {0.0,0.0,0.0,lc};
>> Point(2) = {1,0.0,0.0,lc};
>> Point(3) = {1,1,0.0,lc};
>> Point(4) = {0,1,0.0,lc};
>> Line(1) = {4,3};
>> Line(2) = {3,2};
>> Line(3) = {2,1};
>> Line(4) = {1,4};
>> Line Loop(5) = {2,3,4,1};
>> Plane Surface(6) = {5};
>>
>>
>> Field[1] = MathEval;
>> Field[1].F = "0.1";
>> Background Field = 1;
>>
>> As you can see, I should get a mesh with elements of size 0.1.
>>
>> Unfortunately, I obtain a mesh with size 1.e-2 which was my initial 
>> characteristic length (see isoKO.png). Now, if I set lc=1. I get a 
>> correct mesh (see isoOK.png).
>>
>> So my question is : did I miss something ? Is it normal that the size 
>> field is only taken into account when it is smaller than the initial 
>> characteristic length ? (i.e. no coarsening possible)
>>
>> Best regards,
>> Gregory
>>
>> PS : I played also with anisotropic meshing, and in this case the 
>> metric is taken into account everywhere except on the boundaries.
>>
>> -- 
>> -------------------------------
>> Grégory LEGRAIN
>> Maître de Conférences - Assistant Professor
>> Responsable de l'option Modélisation et Simulation Mécanique (MSM)
>> GeM Institut de Recherche en Génie Civil et Mécanique - UMR CNRS 6183
>> Equipe structure et simulation
>>
>> Ecole Centrale de Nantes
>> 1 Rue de la Noe, 44321 Nantes, France
>> Email : gregory.legrain at ec-nantes.fr 
>> <mailto:gregory.legrain at ec-nantes.fr>
>> Tel : 02.40.37.16.41.
>> Fax : 02.40.37.25.73.
>>
>> <isoOK.png><isoKO.png>_______________________________________________
>> gmsh mailing list
>> gmsh at geuz.org <mailto:gmsh at geuz.org>
>> http://www.geuz.org/mailman/listinfo/gmsh
>
> /*
>
> Professor Jean-François Remacle
> Department of Computational and Applied Mathematics
> Rice University
>
> +1 713 348 6160
> http://www.geuz.org/gmsh
>
> */
>


-- 
-------------------------------
Grégory LEGRAIN
Maître de Conférences - Assistant Professor
Responsable de l'option Modélisation et Simulation Mécanique (MSM)
GeM Institut de Recherche en Génie Civil et Mécanique - UMR CNRS 6183
Equipe structure et simulation

Ecole Centrale de Nantes
1 Rue de la Noe, 44321 Nantes, France
Email : gregory.legrain at ec-nantes.fr
Tel : 02.40.37.16.41.
Fax : 02.40.37.25.73.

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