remove small features from mesh based geometry

Coreform Cubit Meshing
#1

I want to remove the tiny surfaces which are created when I import the following facet file:

How can I remove the two tiny surfaces 1 and 3? I want a solid surface of surface 2 for which I was going to mesh surf 2 using map and then create a net surface.

Thanks

#2

Because each of the two small surface share only one curve with the main surface, you can export the mesh of just the main surface and re-import the mesh as a single surface. Try this:

reset
import facets “MM_transverse_fault1_extended_fw_Lake.facet” feature_angle 135.00 merge make_elements stitch
export stl “surf2.stl” surf 2 mesh overwrite
reset
import stl “surf2.stl”

This surface will tetmesh nicely:

vol 1 scheme tetmesh
vol 1 size 300
mesh surf 1
quality surface all shape global draw mesh

Change the sizing to get the desired tet mesh.

#3

Is it possible to get a map mesh instead of trimesh on this surface? I want an acis geometry of the surface so I need a net surface.

#4

Yes, don’t set the scheme to tetmesh (vol 1 scheme tetmesh). Then, create acis geometry from the meshed surface.

reset
import facets “MM_transverse_fault1_extended_fw_Lake.facet” feature_angle 135.00 merge make_elements stitch
export stl “surf2.stl” surf 2 mesh overwrite
reset
import stl “surf2.stl”
mesh surf 1
create acis surf 1
del vol 1