Effect of mesh characteristics on the flow solutions around a multi–element airfoil using SU2

Moss, Benjamin R., Bagheri, Amir K. and Da Ronch, Andrea (2020) Effect of mesh characteristics on the flow solutions around a multi–element airfoil using SU2. In AIAA AVIATION 2020 FORUM. Aerospace Research Central.. (doi:10.2514/6.2020-3218).

Abstract

The AIAA Meshing, Visualization, and Computational Environments Technical Committee invited submissions for a special session on Mesh Effects for CFD Solutions. The goal of this special session is to quantify how changes in the mesh around a 2D multi--element aerofoil affect solution accuracy and convergence for a CFD flow solver. We used open source code SU2, with the Spalart-Allmaras turbulence model verified using the NASA turbulence modeling resource, to demonstrate the effect of varying various mesh parameters including cell type, surface spacing, and growth rate normal to the wall. Our systematic investigation allows us to contribute to the session's efforts on constituting a best practice mesh for a 2D multi-element aerofoil. In this paper we show that leading and trailing edge length for the main element is a key parameter, along with surface spacing and growth rate normal to the wall. We put bounds on their values that allow the most computational efficient approach to producing robust and accurate flow solutions using automated meshing techniques.

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Contributors

Author: Andrea Da Ronch

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