Surface Mesh CleaningSurface Mesh Cleaning
KVRC 2014KVRC 2014
ObjectivesObjectives
Outline mesh cleaning related issues Outline mesh cleaning related issues that have been highlighted in Race 2;that have been highlighted in Race 2;
Give a few tips and tools available.Give a few tips and tools available.
VarianteVariante
Pre-mesh cleaning step
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Post-mesh cleaning step
Additional faces created
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What happened?What happened?
Original setup (mm)
Netfabb
CFD ready setup
Why using mesh cleaning?Why using mesh cleaning?
Holes in geometry are where edges are Holes in geometry are where edges are attached to only one surface.attached to only one surface.
Where holes are, the CFD meshing may Where holes are, the CFD meshing may not recognise a continuous surface and not recognise a continuous surface and may mesh inside the car/wheels/wings.may mesh inside the car/wheels/wings.
If the CFD meshing occurs inside, the If the CFD meshing occurs inside, the mesh may be of bad quality and affect the mesh may be of bad quality and affect the results…results…
VarianteVarianteOverlapping surfacesThe issue:
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FixFixGeometry moved by about a couple of millimeters to make sure that both sides
are aligned.
LessonsLessons
Free edges = holes = mesh cleaningFree edges = holes = mesh cleaning
Mesh cleaning can affect geometry at Mesh cleaning can affect geometry at holes, soholes, so
Avoid free edges!!!Avoid free edges!!!
SketchUp is not a very good tool to design SketchUp is not a very good tool to design water-tight geometry.water-tight geometry.
ToolsTools
Netfabb Netfabb http://www.netfabb.com/http://www.netfabb.com/ MeshLab MeshLab
http://meshlab.sourceforge.nethttp://meshlab.sourceforge.net
SketchUp STL Exporter: SketchUp STL Exporter: http://www.khamsinvirtualracecarchahttp://www.khamsinvirtualracecarchallenge.com/do/STLExporterPlugin.rbzllenge.com/do/STLExporterPlugin.rbz
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