Aerodynamic analysis of the 2nd High Lift Prediction Workshop by a Lattice-Boltzmann Method solver

This paper presents the results of the CFD code, XFlow , for the test case proposed in the 2 High Lift Prediction Workshop. It demonstrates the potential of its particlebased kinetic solver, based on the Lattice-Boltzmann Method (LBM), to deal with complex geometries. This case deals with a full aircraft in high lift configuration with unstowed flap and slat, including slat tracks, flap track fairings, and slat pressure tube bundles. Traditional CFD software requires a time-consuming meshing process that is prone to errors which significantly affects the mesh quality and thus the outcome of a simulation. Furthermore, the complex geometries such as elements in small gaps adds an extra complication to generate the mesh. In contrast, XFlow, with its flexible particle-based approach, avoids the traditional meshing process and the discretization stage is strongly accelerated, thus reducing engineering costs and complex geometry computations are affordable in a straightforward way.