Instead of keeping as mesh file, you import the file in your meshing software and then convert into .iges format.

With this format you can import the file into any modeling software as in form of geometry.

Sir

You can open the .msh file in Hyper mesh and convert to IGES format and then you can import in ANSYS. I can  advice that regardless of the complexity,there may be few geometrical tolerances and please take care of it.

Good Luck...

Karthik, i have already tried the way u have suggested. But there is geometry distortion happening may be due to tolerances. Thanx for ur reply.

Sir

You can also convert the file to parasolid format as it has minimum tolerance and then export to ANSYS. May be that will work sir