Hello Vidyadhar,
If you have already had a CAD model, you should simply use ParaView just to make an iso-surface and export it to a STL file. That is, an iso-surface would be extracted using the Contour filter as shown in the attached state file and afterwards you need to go to File > Save Data… for saving this iso-surface geometry as a STL file.
iso_surface.7z (1.7 MB)
Then in ICME CFD, you can merge your CAD model and the above STL file and also easily generate a mesh with the intersections between them. See the attached movie.
This is the quickest way I’ve found so far.
- The problem that you mentioned is caused by rounding error. Therefore, the x, y, z coordinates should be written to Nastran file in exponent form within programmable filter. See the above attached state file.