Abstract
A method to estimate the ambient flow encountered by ellipsoidal particles is assessed for 60,000 fully resolved Kolmogorov-length-scale size ellipsoidal particles. A sensitivity analysis is presented to provide confidence intervals of the estimation method and averaged near-particle flow patterns yield further information on the disturbances of the particles. The estimation method is based on filtering and can accurately determine the ambient fluid velocity encountered by the particles. However, the ambient fluid rotation rate and the shear rate are partially filtered, which is related to the finite size of the particles.
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Acknowledgements
This work has been financed by the German Research Foundation (DFG) within the framework of the SFB/Transregio 129 Oxyflame (subproject B2). The support is gratefully acknowledged. 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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Fröhlich, K., Schneiders, L., Meinke, M., Schröder, W. (2020). Ambient Flow Properties of Kolmogorov-Length-Scale Size Non-Spherical Particles in Isotropic Turbulence. In: GarcÃa-Villalba, M., Kuerten, H., Salvetti, M. (eds) Direct and Large Eddy Simulation XII. DLES 2019. ERCOFTAC Series, vol 27. Springer, Cham. https://doi.org/10.1007/978-3-030-42822-8_23
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DOI: https://doi.org/10.1007/978-3-030-42822-8_23
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