[chandra shekhar pant]

Hello All,

I have created a stl file (of an hydrofoil) in gmsh so that it could be imported into the snappyHexMesh. When I am checking the surfaceCheck of the stl file it is giving me the following output:

Surface has no illegal triangles.
Triangle quality (equilateral=1, collapsed=0)
Checking for points less than 1e-6 of bounding box ((0.0992546 0.0160004 0.02) metre) apart.
Found 0 nearby points.
Surface is closed. All edges connected to two faces.
Number of unconnected parts : 1
Number of zones (connected area with consistent normal) : 2
More than one normal orientation.
Wrote zoning to "./csp.vtp"
writing part 0 size 8914 to "./csp_0.obj"
 writing part 1 size 17074 to "./csp_1.obj"

I checked the issue of

More than one normal orientation.

online and found that

surfaceOrient

utility could help, but I am unable to use this utility. Could anyone kindly help in this regard. However I am surprised to see that the overall stl file is fine, but when I looked up the output files from the

surfaceCheck

utility i.e. csp_0.obj and csp_1.obj then it seems that it had created 2 planes/surfaces. Any comment/suggestion will be a great help, thanks in advance.