On Sat, Aug 24, 2013 at 10:07 AM, John Assael <[email protected]> wrote:
> Hi, I have a very small mesh of 2cm x 1cm (2D) and I have a problem > optimising the cell sizes in Gmsh. At this point I do it by hand with trial > and error and also I saw that the triangulation algorithm affects my > results. For example if I select Frontal I get quite different results. > Could you please kindly suggest me any settings that could balance > precision and performance for such a small size? > Hi John, I've also had issues with small meshes in Gmsh. This is obviously a completely dumb problem. The absolute length scale of the mesh should have no bearing on Gmsh's outcome. Anyway, in the past I've just scaled the problem up so that the grid spacing is ~1. You can then rescale the mesh in FiPy or rescale the equations. > Moreover, is there any auto optimisation tool that could help selecting > the optimum cell sizes? > Don't know the answer to this and I'm not sure what you're asking for. Does Dave's answer help? -- Daniel Wheeler
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