A photogrammetric scan would capture any imperfection in realizing the model you already have
duckduckgo.com/?q=sketchup+file+to+blender&ia=web
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https://all3dp.com › 2 › sketchup-to-blender-how-to-import-sketchup-files-in-blender
SketchUp to Blender: How to Import SKP Files in Blender
19 Oct 2021Sketching Out Solutions SketchUp to Blender: How to Import SKP Files in Blender by Lucas Carolo Updated Oct 19, 2021 Advertisement SketchUp is a popular and user-friendly tool, but it lacks good renders. Read on to get your files from SketchUp to Blender!
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Then:
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https://docs.blender.org › manual › en › latest › addons › mesh › 3d_print_toolbox.html
3D Print Toolbox — Blender Manual
Open Blender and go to Preferences, then the Add-ons tab. Click Mesh then 3D Print Toolbox to enable the script. Description Blender can be used to created meshes for 3D printing. Meshes exported from Blender are usually imported into a piece of software takes the mesh and "slices" it into paths that the 3D printer can execute.
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You could export to OpenFOAM, but I'm still waiting for a CFD solution inside Blender.