ZhouBin wrote: > Dear Christophe, > > Sorry to disturb you again. This is maybe my ability to use Gmsh. > > As you could see from the attached file, I have a line tangential to the > circle. Since circle is actually a regular polygon with many sides. There > will be a gap between this line and the "Gmsh circle". >
The geometrical object "circle" in Gmsh is really a circle, not a polygon. (It just looks like a polygon if you zoom in because it's drawn that way.) Now, Gmsh does not compute intersections, so if a line is supposed to be tangent to a circle arc, you have to split the line and the circle arc in two (i.e., introduce the tangency point explicitly) before you can mesh. > Question 1: On what basis does the grid generator decide when a line and a > polygon meet, and when there is a small gap through which fluid can flow? > > Question2: What is done when a circle is so small that the polygonal > representation is only one pixel per polygon side? Or worse, less than one > pixel? > > Thank you very much if you could spend some time for my problem. > > Best regards, > > Bin > > > > _________________________________________________________________ > 多个邮箱同步管理，live mail客户端万人抢用中 > http://get.live.cn/product/mail.html > > > ------------------------------------------------------------------------ > > > ------------------------------------------------------------------------ > > _______________________________________________ > gmsh mailing list > [email protected] > http://www.geuz.org/mailman/listinfo/gmsh -- Prof. Christophe Geuzaine University of Liege, Electrical Engineering and Computer Science http://www.montefiore.ulg.ac.be/~geuzaine _______________________________________________ gmsh mailing list [email protected] http://www.geuz.org/mailman/listinfo/gmsh
