Different versions - different meshing?

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3 years 3 months ago - 3 years 3 months ago #3884 by nepomuk
Different versions - different meshing? was created by nepomuk
Hello,

Is it possible, that the meshing changed throughout the versions of NGSolve? With the code below, I got a mesh with 12543 nodes in NGSolve-6.2.2101 and with 12457 nodes in the in NGSolve-6.2.2103. That's a problem, because I saved some GridFunctions with the old version, that I want to process with the latest version. Is there a fix? Can I somehow create both meshes in one version?

BR, Nepomuk
Code:
Lbeam = SplineGeometry() rad=0.25 offset=0.1 mh=0.025 pnts = [(0, 0), (2.5, 0), (2.5, 1), (1+rad+offset,1),(1+rad+offset,1-rad+offset),(1+offset,1-rad+offset),(1-rad+offset,1-rad+offset),(1-rad+offset,1+offset),(1-rad+offset,1+rad+offset),(1,1+rad+offset),(1,2.5),(0,2.5),(1,1)] pind = [ Lbeam.AppendPoint(*pnt) for pnt in pnts ] Lbeam.Append(['line',pind[0],pind[1]],leftdomain=1,rightdomain=0,bc="bottom") Lbeam.Append(['line',pind[1],pind[2]],leftdomain=1,rightdomain=0,bc="force") Lbeam.Append(['line',pind[2],pind[3]],leftdomain=1,rightdomain=0,bc="nix") Lbeam.Append(['spline3',pind[3],pind[4],pind[5]],leftdomain=1,rightdomain=2,bc="nix") Lbeam.Append(['spline3',pind[5],pind[6],pind[7]],leftdomain=1,rightdomain=2,bc="nix") Lbeam.Append(['spline3',pind[7],pind[8],pind[9]],leftdomain=1,rightdomain=2,bc="nix") Lbeam.Append(['line',pind[9],pind[10]],leftdomain=1,rightdomain=0,bc="nix") Lbeam.Append(['line',pind[10],pind[11]],leftdomain=1,rightdomain=0,bc="diri") Lbeam.Append(['line',pind[11],pind[0]],leftdomain=1,rightdomain=0,bc="left") Lbeam.Append(['line',pind[3],pind[12]],leftdomain=2,rightdomain=0,bc="nix") Lbeam.Append(['line',pind[12],pind[9]],leftdomain=2,rightdomain=0,bc="nix") Lbeam.SetDomainMaxH(2, mh*0.2)
Last edit: 3 years 3 months ago by nepomuk.
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3 years 3 months ago #3886 by christopher
Replied by christopher on topic Different versions - different meshing?
Hi, yes we improved quite a bit of stuff in the mesher. You need to save the mesh with the old version along with the gridfunction. The mesh can then be loaded with the new version.
Best Christopher
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3 years 3 months ago #3887 by nepomuk
Replied by nepomuk on topic Different versions - different meshing?
Ok, thank you.
BR, Nepomuk
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