5 Conclusions
The prediction of unsteady vortex dominated flows show is a challenging task, applying classical RANS simulations often fails and leads to poor results. Here a VLES approach is shown. For this approach an adaptive turbulence model based on the k-ɛ model of Kim and Chen is developed. Applying this approach to vortex dominated flows - vortex rope in a straight diffuser and tip vortex at a ship propeller - leads to an increase on computational accuracy. Therefore this approach seems to be suitable for this types of flows.
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References
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Ruprecht, A. (2006). Numerical prediction of vortex instabilities in turbomachinery. In: Shokin, Y., Resch, M., Shokina, N., Danaev, N., Orunkhanov, M. (eds) Advances in High Performance Computing and Computational Sciences. Notes on Numerical Fluid Mechanics and Multidisciplinary Design (NNFM), vol 93. Springer, Berlin, Heidelberg . https://doi.org/10.1007/978-3-540-33844-4_17
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DOI: https://doi.org/10.1007/978-3-540-33844-4_17
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