New syntax for boundary layers

General
1

Hi,
Could you provide some help with the new syntax for boundary layers in ngsolve 6.2.2501

In ngsolve 6.2.2401 I was using
…
nmesh = OCCGeometry(joined_object).GenerateMesh(meshsize.coarse, maxh=100)

to generate a mesh and

…
nmesh.BoundaryLayer(boundary=“.*”, thickness=layer_thicknesses, material=boundary_layer_material,
domains=boundary_layer_material, outside=False)

to add the layers. But this no longer appears to be supported in the new version. The help is suggesting to look at help(BoundaryLayerParameters) but it says this undefined.

Thanks Paul

2

Thanks to James Elgy, I think what is needed is

from netgen.meshing import BoundaryLayerParameters

and then e.g.

box = Box(Pnt(0,0,0), Pnt(1,1,1))
cyl = Cylinder(Pnt(1,0.5,0.5), X, r=0.3, h=0.5)

fused = box+cyl
geo = OCCGeometry(fused)
B = BoundaryLayerParameters(boundary=‘.‘, thickness=0.1, domain=’.’)
nmesh = (geo.GenerateMesh(boundary_layers=[B], maxh=0.2))

help(BoundaryLayerParameters) will then display the new options.