Thanks hugo. That works nice and finally can get the mesh.
But, how do I proceed to get the volume of the sphere with no mesh? It's possible? 2014-09-23 8:00 GMT-05:00 Hugo Fernando Maia Milan < [email protected]>: > Hi, > > It looks that the size of the point that you defined are very small > compared to the size of the object. I had created a new file, check it in > the attached. > > In this file, you can specify the radius of the sphere and the lengths of > the rectangle. Pay attention in the size of the points because they are > critical in regard of the size of your elements (and the mesh, > consequently). > > If it is too slow or you can't create the mesh, just increase the values > of lc and lesfera in the file. > > Hugo. > > ------------------------------ > Date: Mon, 22 Sep 2014 10:28:20 -0500 > From: [email protected] > To: [email protected]; [email protected] > Subject: [Gmsh] Problem meshing a sphere. gmsh crash meshing or not > recognize the volume. > > > Hi. > > I'm a new user of gmsh, I have developed some tutorials in it, but now i > have several problemas. > > I'm trying to simulate the flow around a sphere, the main goal is > calculate the drag force and drag coefficient in OpenFOAM. However, I'm > having a lot of problems creating the mesh, I've made two process to > generate the mesh with no success at all. > > First way. > 1. I generate a CAD model in solidEDGE, in that model I draw a solid > volume with the hole of the sphere (boolean operation). The volume > represent the all fluid. > 2. I export the CAD Model into step, stl and igs files. > 3. In gmsh, merge the step model. > 4. gmsh show the surfaces, points and volumes rigth (gmsh show the walls > in gray solid color). > 5. Define the physical groups, surfaces with no problem. > 6. When I try to select the volume in physical group is just impossible. > > Second Way > As the geometry is a bit simple, I decided to draw the sphere and the box > in which its embeded in gmsh. > > 1. I draw some points to define the sphere. > 2. Create circle arc to define the sphere. > 3. With those circle arcs created I defined ruled surface in the sphere. > 4. Then Create the box around the sphere. > 5. The surfaces in physical groups are defined normally, but I created a > surface call sphere, in which I select the all ruled surfaces created on > the sphere. > 6. Select the volume in the physical groups (WHEN I DEFINED THE PHYSICAL > GROUPS I'VE ALREADY DEFINED THE VOLUME AND SURFACES IN ELEMENTARY ENTITIES) > 7. Then, with everything O.K. I try to create the mesh, but the program > just crash, and close. > > I have a problem to open gmsh to, everytime I try to open it I have to > write in the console (Ubuntu) this: gmsh primary.geo -tol 1e-9 > > I attach the geo file. > > Thanks! I really appreciate any comment about it. > > spheredesarrollada.geo is the second way file generated. > sphereNueva.geo is the first way file > -- > Esteban Vargas Bolívar > Metálicas Léguz S.A. > Tel.: (4)5203600 Ext. 103 > > _______________________________________________ gmsh mailing list > [email protected] http://www.geuz.org/mailman/listinfo/gmsh > -- Esteban Vargas Bolívar Metálicas Léguz S.A. Tel.: (4)5203600 Ext. 103
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