Energy dissipation in violent three-dimensional sloshing flows induced by high-frequency vertical accelerations

The European H2020 project SLOWD is aimed to investigate the fuel sloshing damping effect reduce design loads on aircraft wings. Wings house tanks and are highly flexible structures that can significantly deform under gust loads. In recent experiment by Martinez-Carrascal González-Gutiérrez [“Experimental study of liquid effects a SDOF vertical tank,” J. Fluids Struct. 100, 103172 (2021)], complex problem inside wing structure was simplified considering partially filled vertically heaving tank attached system springs. present research, smoothed particle hydrodynamic model adopted evaluate energy dissipated in three-dimensional flow obtained using same motions. From numerical point view, simulation such violent rather challenging, involved accelerations being as large 10 g. resulting extremely because severe turbulence developed, impacts, considerable fragmentation air–liquid interface. role viscosity investigated taking into account two different liquids. Finally, some comparisons between results previous two-dimensional studies also discussed.