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Improvement of a Bidimensional Overset Structured Mesh Generation and Adaptation Method, Based on a Near-Body/Off-Body Partitioning

Kultajev, E., C. Benoit, S. Peron, and A. Lerat

Research Notes, 20th International Meshing Roundtable, Springer-Verlag, pp.Research Note, October 23-26 2011

IMR
PROCEEDINGS

20th International Meshing Roundtable
Paris, France
October 23-26, 2011

Onera - The French Aerospace Lab, F-92322 Chatillon, France
DynFluid Lab., Arts et MĀ„etiers ParisTech, Paris, France
Email: ekaterina.kultajev@onera.fr, christophe.benoit@onera.fr, stephanie.peron@onera.fr, alain.lerat@ensam.eu

Summary
An automatic overset structured mesh generation and adaptation method for Computational Fluid Dynamics (CFD) is being developed at Onera. This method is based on computational domain partitioning into off-body Cartesian regions and near-body curvilinear regions [1] and has been introduced to simplify the mesh generation process. Off-body grids are a set of structured Cartesian grids that can be automatically generated and adapted [1, 2]. The Chimera method enables solution transfer between grids [3, 4, 5]. Previously, a method based on geometry decomposition identifying sharp edges has been developed to automatically generate short extension nearbody grids around bidimensional geometries with a regular step along the wall [6]. Here we describe an extension of this method, generating non-uniform, curvature-dependent and flow features-dependent grid step along the wall.

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