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Explain GMSH element sizing methods

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Old   September 2, 2012, 15:39
Default Explain GMSH element sizing methods
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Viggy Palaniappan
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I have an aerofoil in a circular farfield and want to create meshes of varying element size in GMSH.

I've been using the a) geometry file to change the element size @ certain points and b) the mesh element size factor tool in the GUI and c) the refine by splitting option in the toolbox.

Can someone explain why there are three options/what do they do and how to systematically create a series of meshes? I'd love some help please =)
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Old   March 21, 2013, 13:56
Felipe Portela
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a) you simply prescribe the target characteristic size of the elements at that point, Gmsh interpolates between these values to generate the mesh.
b) scales all the target sizes by the size factor
c) split elements to create a finer mesh (though I believe the manual mentions the quality of the mesh will be quite poor when using this)

By series of meshes, you mean different mesh sizes for a same geometry? If so, maybe you can just play around with option b).

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