My understanding is that STL format is for triangulated meshes, whereas IGES is a higher-level format that allows more complex shapes, like circles, cubes, prisms etc to be represented. So if you convert an STL file to an IGES file, there will need to be some processing to re-create the solids that you are interested in modelling, especially if you are hoping to make use of those higher-order shapes when defining your CFD model. For example, do you want to use the STL triangles as the surface mesh for your object, or do you need to re-mesh to an even finer (or coarser) mesh eg at the boundary layers?
You could try with certain open source tools like FreeCAD (which claim to allow import of STL and export of IGES) but you might find difficulties.
I suspect that you might need to re-evaluate why you are using STL format and whether going via IGES is really the best move. Perhaps there are other routes.
Thank you for your valuable suggestions.My structure is big complicated shaped which requires finer re mesh at the boundary layer.Can you suggest some other options available for my model.Your kind cooperation will be appreciated.
Thanks and Regard
sumit kumar
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