[Gmsh] structured mesh in a wedge

[Deepak Garg]

Hi Ali

In place of     Plane Surface(6) = {5};

you should write   Ruled Surface(6) = {5};

Best
Deepak

On 16 May 2016 at 20:17, CHARCHI AGHDAM, ALI <alic at email.sc.edu> wrote:

> Hi Felix,
>
> Thanks for your reply. I made the changes you suggested but I am still
> getting some errors:
>
>
>
> Info    : Meshing surface 14 (transfinite)
>
> .Error   : Surface 14 cannot be meshed using the transfinite algo 1 != 19
>
> Info    : Meshing surface 14 (extruded)
>
> Info    : Meshing surface 18 (transfinite)
>
> Info    : Meshing surface 21 (transfinite)
>
> .Error   : Surface 21 cannot be meshed using the transfinite algo 19 != 1
>
>
>
> My new geo file is:
>
>
>
> n1=10;
>
> n2=20;
>
>
>
> Point(1) =  {0.000000000000e+00 , 0.000000000000e+00 , 0.000000000000e+00
> , 1e-5 };
>
> Point(2) =  {1.998096443164e-05 , 0.000000000000e+00 , -8.723877473067e-07
> , 1e-5 };
>
> Point(3) =  {1.198857865898e-04 , 0.000000000000e+00 , -5.234326483840e-06
> , 1e-5 };
>
> Point(4) =  {0.000000000000e+00 , 1.400000000000e-04 , 0.000000000000e+00
> , 1e-5 };
>
> Point(5) =  {0.000000000000e+00 , 8.000000000000e-05 , 0.000000000000e+00
> , 1e-5 };
>
> Rotate {{0, 1, 0}, {0, 0, 0}, -0.04363323129985824} {
>
>   Point{5, 4, 2, 3};
>
> }
>
>
>
> Line(1) = {5, 4};
>
> Line(2) = {2, 3};
>
> Ellipse(3) = {5, 1, 4, 2};
>
> Ellipse(4) = {4, 1, 4, 3};
>
>
>
> Line Loop(5) = {3, 2, -4, -1};
>
> Plane Surface(6) = {5};
>
>
>
> Extrude {{0, 1, 0},{0,0,0},0.08726646259971647}{
>
>    Surface{6};
>
>    Layers{1};
>
>    Recombine;
>
> }
>
>
>
> Surface Loop(24) = {6, 14, 18, 21, 23};
>
> Volume(25) = {24};
>
>
>
> Transfinite Line {1,2} = n1;
>
> Transfinite Line {3,4} = n2;
>
>
>
> Transfinite Surface {6} = {};
>
> Transfinite Surface {21} = {3,4,13};
>
> Transfinite Surface {14} = {2,9,5};
>
> Transfinite Surface {18} = {};
>
> Transfinite Surface {23} = {};
>
>
>
> Recombine Surface {6,21,14,18,23};
>
>
>
> Transfinite Volume{25} = {2,3,4,5,9,13,4,5};
>
>
>
> Physical Surface("front") = {6};
>
> Physical Surface("back") = {23};
>
> Physical Surface("right") = {21};
>
> Physical Surface("down") = {18};
>
> Physical Surface("electrode") = {14};
>
>
>
> Note that 14 and 21 surfaces are bounded by 3 lines so, I have specified
> the corners.
>
>
>
> Ali
>
>
>
> *From:* Felix Salazar [mailto:felix.a.salazar at gmail.com]
> *Sent:* Monday, May 16, 2016 12:09 PM
> *To:* CHARCHI AGHDAM, ALI <alic at email.sc.edu>
> *Cc:* gmsh at onelab.info
> *Subject:* Re: [Gmsh] structured mesh in a wedge
>
>
>
> Hello,
>
>
>
> All your surfaces should be Transfinite. And if they are bounded by 4
> lines, you don't need to specify the corners. You might try:
>
>
>
> Transfinite Surface {6} = {};
>
> Transfinite Surface {21} = {};
>
> Transfinite Surface {14} = {};
>
> Transfinite Surface {18} = {};
>
> Transfinite Surface {23} = {};
>
>
>
> Recombine Surface {6,21,14,18,23};
>
>
>
> Although, you might just need to increase the number of layers in your
> extrusion. This PC does not have GMSH installed so I can't check your GEO
> file
>
>
> -------------------------
> *Félix Salazar*
> felix.a.salazar at gmail.com
>
> -------------------------
>
>
>
> On Thu, May 12, 2016 at 4:50 PM, CHARCHI AGHDAM, ALI <alic at email.sc.edu>
> wrote:
>
> Hi everyone,
>
> I would like to mesh a wedge using gmsh. I have already been able to mesh
> all the surfaces but the 3D mesh module fails to extrude the 2D mesh and
> generate 3D mesh. I am getting the following error:
>
>
>
> Incompatible surface 14 in transfinite volume 25.
>
>
>
> And here is my geo file:
>
>
>
> n1=20;
>
> n2=40;
>
>
>
> Point(1) =  {0.000000000000e+00 , 0.000000000000e+00 , 0.000000000000e+00
> , 1e-5 };
>
> Point(2) =  {1.998096443164e-05 , 0.000000000000e+00 , -8.723877473067e-07
> , 1e-5 };
>
> Point(3) =  {1.198857865898e-04 , 0.000000000000e+00 , -5.234326483840e-06
> , 1e-5 };
>
> Point(4) =  {0.000000000000e+00 , 1.400000000000e-04 , 0.000000000000e+00
> , 1e-5 };
>
> Point(5) =  {0.000000000000e+00 , 8.000000000000e-05 , 0.000000000000e+00
> , 1e-5 };
>
> Rotate {{0, 1, 0}, {0, 0, 0}, -0.04363323129985824} {
>
>   Point{5, 4, 2, 3};
>
> }
>
>
>
> Line(1) = {5, 4};
>
> Line(2) = {2, 3};
>
> Ellipse(3) = {5, 1, 4, 2};
>
> Ellipse(4) = {4, 1, 4, 3};
>
>
>
> Line Loop(5) = {3, 2, -4, -1};
>
> Plane Surface(6) = {5};
>
>
>
> Extrude {{0, 1, 0},{0,0,0},0.08726646259971647}{
>
>    Surface{6};
>
>    Layers{1};
>
>    Recombine;
>
> }
>
>
>
> Surface Loop(24) = {6, 14, 18, 21, 23};
>
> Volume(25) = {24};
>
>
>
> Transfinite Line {1,2} = n1 Using Progression 1;
>
> Transfinite Line {3,4} = n2 Using Progression 1;
>
>
>
> Transfinite Surface {6} = {2,3,4,5};
>
>
>
> Recombine Surface {6,21,14,18,23};
>
>
>
> Transfinite Volume{25} = {2,3,4,5,9,13,4,5};
>
>
>
> Would you please help?
>
>
>
> Best regards,
>
>
>
> *Ali Charchi*
>
>
>
> *PhD Student of Mechanical Engineering*
>
> *University of South Carolina*
>
> *Columbia, SC*
>
>
>
>
>
>
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