STEP file, where the geometry isn't translating correctly (e.g., round duct being broken up into independent faces instead of a continuous, smooth shape). While CADmep doesn't directly export to .STEP format with the same level of detail as Navisworks, there are a few workarounds that might help:
Use a CAD Conversion Tool: Try exporting the file from CADmep to an intermediate format like DWG or DXF first, then import that into a CAD program like AutoCAD or SolidWorks. From there, you should be able to re-export the model to .STEP format without losing the solid geometry. This way, the round duct should remain intact as a smooth entity.
Check Export Settings: When exporting to .STEP, make sure you're selecting the appropriate export options (for example, "solid" or "precise" geometry options) to prevent the shapes from being broken into multiple independent faces. Depending on your version of CADmep, there may be settings that influence how the geometry is converted.
Use Navisworks for Export: Since Navisworks handles the geometry better in your case, you could export the CADmep file to Navisworks and then use the Navisworks tools to export to .FBX or another format that retains solid geometry. From there, you could import it into your CFD software.
Third-Party Software: If the above methods aren't effective, third-party software like Rhino or Inventor may offer better capabilities for translating geometry into .STEP files without exploding the shapes. You could try importing the file into one of those programs and then exporting it as a
