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A Fast and Fully Automated Cartesian Meshing Solution for Dirty CAD Geometries
Technical Paper
2008-01-2998
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The most time-consuming step in an external aerodynamics or underhood CFD process is that of generating a usable mesh from CAD data. Conventional mesh generators require a water-tight surface mesh before they can generate the volume mesh. Typical CAD surface data available for mesh generation is far from satisfactory for volume mesh creation: no node-to-node matching between mating parts, minute gaps, overlapping surfaces, overlapping parts, etc. To clean up this kind of data to a level that can be used for volume mesh creation requires a lot of manual work that could take a couple of weeks or more to accomplish. This paper presents a fast and fully automated, Cartesian cell dominated projected mesh generation algorithm used in CFD-VisCART that eliminates the need for CAD data cleaning, thus shaving off weeks worth of time off the design cycle. This process of mesh generation involves the volume mesh cells being generated first and then projected onto the surfaces of the CAD model to create the surface mesh automatically. Additionally, this projection method has intrinsic advantages when dealing with minute gaps and overlapping parts. Shrink-wrapping (to cover up larger holes or simplify an assembly of parts), automatic hole detection (to detect any mesh leaks), gap handling (to ensure proper mesh resolution between neighboring parts) and such other tools together with the novel features of the projection algorithm mentioned above can reduce turnaround time for mesh generation from 3–4 weeks to less than one day.
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Citation
Kini, S., Thoms, R., and Zhu, F., "A Fast and Fully Automated Cartesian Meshing Solution for Dirty CAD Geometries," SAE Technical Paper 2008-01-2998, 2008, https://doi.org/10.4271/2008-01-2998.Also In
References
- Srinivasan Kumar Wang Z.J. Yuan Wei Sun Richard “Vehicle Thermal Management simulation using a Rapid omni-tree based Adaptive Cartesian mesh generation methodology” 2004 ASME Heat Transfer/Fluids Engineering Summer Conference July 11–15 2004 Charlotte, North Carolina USA
- Wang Z.J. Srinivasan Kumar “An adaptive Cartesian grid generation method for ‘Dirty’ geometry” International Journal for Numerical Methods in Fluids 2002 39 703 717
- Zhu F. Mindt H.-W, Ottow W. Megahed M. “Simulation Based Design Reliable CAD – Multi-physics Interaction”, NAFEMS Seminar “Integration of Numerical Simulation into the Product Development Process (FEA and CFD)” Nov. 2006 Gothenburg, Sweden