Investigation of conservative source term interpolation applied to aeroacoustics

In low Mach number aeroacoustics, the well known disparity of length scalesmakes it possible to apply well suited hybrid simulation models using differentmeshes for flow and acoustics, which leads to a powerful computational procedure.In general, hybrid aeroacoustic methods seek for robust and conservative meshto mesh transformation of the aeroacoustic sources while high computationalefficiency is ensured.We investigate the accuracy of a standard conservativeinterpolation scheme compared to the more accurate cut-volume-cell approachand their application to the computation of rotating systems, namely an axial fan.The capability and the robustness of the cut-volume-cell interpolation in a hybridworkflow on different meshes are investigated by a grid convergence study.