A 2nd Generation Parallel Advancing Front Grid Generator
21st International Meshing Roundtable, Springer-Verlag, pp.457-474, October 7-10 2012
21st International Meshing Roundtable
San Jose, CA
CFD Center, Dept. of Computational and Data Science M.S. 6A2, College of Science, George Mason University Fairfax, VA 22030-4444, USA
A scalable, parallel advancing grid generation technique has been developed for complex geometries and meshes with large size variations. The key innovation
compared to previous techniques is the use of a domain-defining grid that has the same fine surface triangulation as the final mesh desired, but a much coarser
interior mesh. In this way, the domain to be gridded is uniquely defined, overcoming a shortcoming of previous approaches. This domain-defining grid is then partitioned
according to the estimated number of elements to be generated, allowing for a balanced distribution of work among the processors. The domain defining grid is also
used to redistribute the elements and points after grid generation, and during the subsequent mesh improvement.
Timings show that the proposed approach is scalable and able to produce large grids of high quality in a modest amount of clocktime.
With the proposed parallel grid generator, a major impediment to a completely scalable simulation pipeline (grid generation, solvers, post-processing) has been removed,
opening the way for truly large-scale computations using unstructured, bodyfitted rids.
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