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Drag prediction, decomposition and visualization in unstructured mesh CFD solver of TAS‐code
Author(s) -
Yamazaki Wataru,
Matsushima Kisa,
Nakahashi Kazuhiro
Publication year - 2007
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.1643
Subject(s) - drag , aerodynamic drag , solver , drag divergence mach number , computational fluid dynamics , drag coefficient , parasitic drag , wave drag , zero lift drag coefficient , aerodynamics , drag equation , computer science , mechanics , computational science , lift induced drag , physics , programming language
Abstract The accuracy of drag prediction in unstructured mesh CFD solver of TAS (Tohoku University Aerodynamic Simulation) code is discussed using a drag decomposition method. The drag decomposition method decomposes total drag into wave, profile, induced and spurious drag components, the latter resulting from numerical diffusion and errors. The mesh resolution analysis is conducted by the drag decomposition method. The effect of an advanced unstructured mesh scheme of U‐MUSCL reconstruction is also investigated by the drag decomposition method. The computational results show that the drag decomposition method reliably predicts drag and is capable of meaningful drag decomposition. The accuracy of drag prediction is increased by eliminating the spurious drag component from the total drag. It is also confirmed that the physical drag components are almost independent of the mesh resolution and scheme modification. Copyright © 2007 John Wiley & Sons, Ltd.