Abstract
An efficient Cartesian cut-cell/level-set method based on a multiple grid approach to simulate turbulent turbomachinery flows is presented. The finite-volume approach in an unstructured hierarchical Cartesian setup with a sharp representation of the complex moving boundaries embedded into the computational domain, which are described by multiple level-sets, ensures a strict conservation of mass, momentum, and energy. Furthermore, an efficient kinematic motion level-set interface method for the rotation of embedded boundaries described by multiple level-set fields on a computational domain distributed over several processors is introduced. This method allows the simulation of multiple boundaries rotating relatively to each other in a fixed frame of reference. To demonstrate the efficiency of the numerical method and the quality of the computed findings the generic test problem of a rotating cylinder surrounded by a stationary hull and the flow over a ducted rotating axial fan with a stationary turbulence generating grid at the inflow are simulated. The computational results of the axial fan show a good agreement with the experimental data.
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Acknowledgements
This study was funded under Grant No. 17747N (L238) by the German Federal Ministry of Economics and Technology via the ”Arbeitsgemeinschaft industrieller Forschungsvereinigungen Otto von Guericke e.V. ” (AiF) and the ”Forschungsvereinigung Luft- und Trocknungstechnik e.V.” (FLT). Computing resources were provided by the High Performance Computing Center Stuttgart (HLRS) and by the Jülich Supercomputing Center (JSC) within a Large-Scale Project of the Gauss Center for Supercomputing (GCS).
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Pogorelov, A., Schneiders, L., Meinke, M. et al. An Adaptive Cartesian Mesh Based Method to Simulate Turbulent Flows of Multiple Rotating Surfaces. Flow Turbulence Combust 100, 19–38 (2018). https://doi.org/10.1007/s10494-017-9827-9
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DOI: https://doi.org/10.1007/s10494-017-9827-9