Fifth High Lift Prediction Workshop: Mesh Adaptation Technology Focus Group Summary

The AIAA workshop series supports the computational fluid dynamics (CFD) community through impartial evaluation of publicly available test case submissions to establish and improve the state-of-the-art in applied CFD. The Fifth AIAA CFD High Lift Prediction Workshop (HLPW-5) is organized to assess the numerical prediction and physical modeling capabilities of CFD technology for swept wings in landing and takeoff high-lift configurations. Multiple Common Research Model High-Lift variants are assessed, and the Mesh Adaptation Technical Focus Group submissions are summarized. Test Case 1 focuses on turbulence model verification. Variation between methods is low for a fuselage with a single-element wing, which allowed for convincing verification of two Spalart–Allmaras turbulence model variants. Test Case 2 provides an incremental high-lift component buildup to isolate the influence of geometry. Variation between methods increases slightly with a deployed leading-edge slat and increases dramatically with the addition of trailing-edge flaps. Comparisons to experiment and between submissions are favorable for the configuration without trailing-edge flaps at low and moderate angles of attack, which roughly defines the validation and validity threshold of existing methods using steady Reynolds-averaged Navier–Stokes (RANS) turbulence models. Documenting this validity threshold sets the stage for developing RANS modeling improvements.