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Determination of Flow Regions for Hybrid Grid Adaptation

Kallinderis, Yannis, Vasileios Sassanis

23rd International Meshing Roundtable, Elsevier Ltd., pp.Research Note, October 12-15 2014

IMR
PROCEEDINGS

23rd International Meshing Roundtable
London, UK
October 12-15,2014

Laboratory of Aerodynamic Design of Air Vehicles, Department of Mechanical and Aeronautical Engineering, University of Patras, 26504 Rio, Greece
Email: kallind@otenet.gr, sassanisv@gmail.com

Abstract
Adaptive grid refinement/coarsening is an important method for achieving increased accuracy of flow simulations with reduced computing resources. A primary issue of adaptive simulations is the reliable detection of the grid elements to be refined/coarsened. Various sensors for adaptation are employed via a spectrum of flow cases which include boundary layers (attached and separated), wakes, vortices, as well as shock waves. Two developments are presented regarding automation and effectiveness of the adaptation process. The first is automatic determination of a suitable threshold of local refinement/coarsening. The second involves a special adaptive octree technique that yields compact local adaptation regions.

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