<html dir="ltr"><head></head><body style="text-align:left; direction:ltr;"><div><a href="http://gmsh.info/doc/texinfo/gmsh.html#Specifying-mesh-element-sizes">http://gmsh.info/doc/texinfo/gmsh.html#Specifying-mesh-element-sizes</a></div><div><br></div><div>On Sat, 2020-05-30 at 00:21 -0700, Tian Xia wrote:</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><div dir="ltr">Hi Gmsh developers,<div><br></div><div>Thank you for developing this extremely useful tool. Recently I have encountered a couple of problems about generating 3D non-uniform mesh:</div><div><br></div><div>1. If I define a background (for example threshold) field and define the lc for an object using "Characteristic Length{ PointsOf{Volume{1};} } = lc;", the mesh size in the volume 1 will have two mesh size definitions. How will Gmsh treat this this? Will it just use the smaller lc or overwrite one of these? </div><div><br></div><div>2. If I'd like to mesh a box in this way: the surface closed to the eight corners (for example, distance=1) need to be densely meshed (lc0), other part of the surface needs to be meshed with lc1. Inside the volume, it can be meshed as coarse as possible. Is there a way to do that in Gmsh?</div><div><br></div><div>Thank you for your help!</div><div><br></div><div>Bet regards.</div><div>Tian</div></div>
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