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High-fidelity, dynamic CAD model for propagating surfaces and moving meshes

Andrieu, Bastien, Denis Gueyffier

Proceedings, 26th International Meshing Roundtable, Elsevier, Science Direct, September 18-21 2017

INTERNATIONAL
MESHING
ROUNTABLE

26th International Meshing Roundtable
Barcelona, Spain
September 18-21, 2017

Bastien Andrieu, ONERA, FR, bastien.andrieu@onera.fr
Denis Gueyffier, ONERA, FR, denis.gueyffier@onera.fr

Abstract
We present a set of methods designed for tracking with high-order accuracy the propagation of surfaces in three dimensions with arbitrary geometric and topological complexity. Targeted applications are engineering and scientific problems for which a CAD model of the geometry is available, i.e. surface patches with high-order parameterizations as well as topological connectivity. Our method uses and maintains such a representation throughout the propagation. Validity of the dynamic boundary-representation model is ensured by handling geometric singularities. Examples are presented to demonstrate the accuracy of the pseudo-spectral method used for tracking each surface patch. A strategy for deriving a dynamic surface mesh is finally proposed for applications such as Finite Element/Volume computations with body-fitted volume grids in domains with deforming boundaries.

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