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Uniting Dissimilar Hex Meshes to Achieve a Many-to-Many Swept Topology

Clark, Brett and Ivan Yorgason

Research Notes, 22nd International Meshing Roundtable, Springer-Verlag, pp.Research Note, October 13-16 2013

IMR
PROCEEDINGS

22nd International Meshing Roundtable
Orlando, FL
October 13-16, 2013

Sandia National Labs, Albuquerque, NM, 87185, U.S.A.
Brigham Young University (Sandia Intern), Provo, UT, 84602, U.S.A.
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Summary
The pave and sweep approach in CUBIT for generating all-hex meshes continues to be the work-horse method for complex assembly models at Sandia. Model builders generally have to do significant amounts of often complex geometry decomposition to prepare the CAD model for sweeping. Being able to do many-to-many (many source to many target) sweeping would significantly reduce the amount of decomposition required. Various attempts at a robust many-to-many sweeping algorithm have been made but a production-level capabilty still does not exist within CUBIT. One of the difficulties of the algorithm is generating clean imprints of projected source and target surfaces that result in high quality hexes and no slivers. This research attempts to gain further insights into the 2D imprinting of sources and targets by considering the scenario of uniting two meshed volumes that do not have a common mesh at their interface but which would result in a many-to-many swept mesh topology after a successful unite.

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