Fifth AIAA High-Lift Prediction Workshop: High-Order Discretization Technology Focus Group Summary

This paper summarizes the High-Order Technical Focus Group (HO-TFG) submissions for the 5th AIAA High-Lift Prediction Workshop (HLPW-5). The goal of the workshop was to assess the state-of-the-art in mesh generation and computational fluid dynamics software for predicting the peak lift of transport aircraft with flaps and slats deployed. Numerous geometric buildups of the Common Research Model High-Lift (CRM-HL) variant and Reynolds number considerations served as the primary focus of the workshop, and a simple wing–body variant of the CRM-HL was used as a verification test case. The HO-TFG was tasked with generating high-order curved meshes for these complex geometries and computing high-order solutions using both Reynolds-averaged Navier–Stokes (RANS) and scale-resolving large-eddy simulation (LES) formulations. While participation in the HO-TFG was limited, the effort produced curved meshes on highly complex geometric configurations and computational results from two participants. The LES results demonstrate the potential for producing results comparable to those from second-order accurate methods, but with fewer degrees of freedom. The RANS submission for this workshop does not demonstrate a benefit over second-order schemes. However, the authors will argue that a lack of understanding of optimal mesh distributions for high-order methods is the cause of the limited benefits observed for the RANS results.