Hi,<br>
<br>
I would like to use the NETGEN algorithm to mesh a layered sphere (.geo
file attached). It is stated that all surface normals need to be
outwardly directed in order for the NETGEN algorithm to work. The
layered spheres are built by extruding semicircles in such a way that
both the sphere and the outer layer consist of three volumes. I can
ensure that the normals of the sphere outer surfaces are outward
pointing by extruding in the direction of -theta. How should I treat
the surfaces bounding the sides of the three segments making up the
sphere? The concept of an outwardly directed normal seems to lose
meaning here and thusfar all attempts to mesh the domain with NETGEN
has resulted in gmsh crashing.<br>
<br>
Any ideas?<br>
<br>
Julian<br>