CFD code comparison for 2D airfoil flows
Niels N. Sørensen (Technical University of Denmark (DTU))
B. Méndez (CENER)
A. Muñoz (CENER)
G. Sieros (CRES)
E. Jost (University of Stuttgart)
T. Lutz (University of Stuttgart)
G. Papadakis (National Technical University of Athens)
S. Voutsinas (National Technical University of Athens)
G. N. Barakos (University of Glasgow)
S. Colonia (University of Glasgow)
D. Baldacchino (TU Delft - Wind Energy)
C. Baptista (TU Delft - Wind Energy)
C. Ferreira (TU Delft - Wind Energy)
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Abstract
The current paper presents the effort, in the EU AVATAR project, to establish the necessary requirements to obtain consistent lift over drag ratios among seven CFD codes. The flow around a 2D airfoil case is studied, for both transitional and fully turbulent conditions at Reynolds numbers of 3 × 106 and 15 × 106. The necessary grid resolution, domain size, and iterative convergence criteria to have consistent results are discussed, and suggestions are given for best practice. For the fully turbulent results four out of seven codes provide consistent results. For the laminar-turbulent transitional results only three out of seven provided results, and the agreement is generally lower than for the fully turbulent case.
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