Hi Julius, I guess you have to define theses points as Physical Points, isn’t it ?
All the best, VH 2016-03-31 17:54 GMT+02:00 Julius Bier Kirkegaard <[email protected]>: > Dear all, > > I have (I think) a fairly simple question, but it's also quite atypical, > so I have had no luck Googling. I hope that you one of you might have time > to point me in the right direction... > > I have a box: > > box_size = 50; > lb = 10.; > Point(1) = {-box_size/2, -box_size/2, -box_size/2, lb}; > Point(2) = {box_size/2, -box_size/2, -box_size/2, lb}; > Point(3) = {box_size/2, box_size/2, -box_size/2, lb}; > Point(4) = {-box_size/2, box_size/2, -box_size/2, lb}; > Line(1) = {1, 2}; > Line(2) = {2, 3}; > Line(3) = {3, 4}; > Line(4) = {4, 1}; > Line Loop(5) = {1, 2, 3, 4}; > Plane Surface(6) = {5}; > Extrude {0, 0, box_size} { > Surface{6}; > } > > This works quite well and gmsh is happy to (3D) mesh it. > > The problem is that I would to ensure that certain points inside the box > are node points. So my question is, how do I ensure that points, like these > > lc = 10; > Point(5) = {7.150548, 1.000000, -6.990684, lc}; > Point(6) = {-4.438894, 1.000000, -8.960816, lc}; > Point(7) = {-9.893936, 1.000000, 1.452595, lc}; > Point(8) = {-1.675894, 1.000000, 9.858569, lc}; > Point(9) = {8.858176, 1.000000, 4.640336, lc}; > Point(10) = {1.675894, 4.750000, -9.858569, lc}; > Point(11) = {-8.858176, 4.750000, -4.640336, lc}; > Point(12) = {-7.150548, 4.750000, 6.990684, lc}; > Point(13) = {4.438894, 4.750000, 8.960816, lc}; > Point(14) = {9.893936, 4.750000, -1.452595, lc}; > Point(15) = {7.150548, 8.500000, -6.990684, lc}; > > are part of the mesh nodes? > > The reason I need this is that I need to impose boundary conditions at > these specific points. > > Thank you all in advance. > > Best wishes, > Julius > > > > > > > > _______________________________________________ > gmsh mailing list > [email protected] > http://onelab.info/mailman/listinfo/gmsh > > -- Docteur Ingénieur de recherche CeMoSiS <http://www.cemosis.fr> - [email protected] Tel: +33 (0)3 68 8*5 02 06* IRMA - 7, rue René Descartes 67 000 Strasbourg
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