Abstract
In the present work, computations of flow and heat transfer in an idealized cylindrical Czochralski configuration are conducted using Large Eddy Simulation (LES) with the flow solver FASTEST-3D developed at LSTM Erlangen. The results match well with DNS data from the literature. However, detailed data for analysis of turbulent quantities are not available. Therefore, DNS computations are conducted using the code LɛSOCC, employing explicit time marching. Preliminary simulations show the high efficiency of the solver on the NEC SX-8. Furthermore, from a study of the velocity profiles at the wall, the resolution requirements had to be corrected such that the computational grid will now consist of approximately 8 × 106 control volumes. The present run of the DNS took more than 540 hours of walltime on 8 processors. With the results, the LES computations will be thoroughly validated so that appropriate models and parameters can be chosen for efficient and accurate simulations of practically relevant cases.
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Raufeisen, A., Breuer, M., Kumar, V., Botsch, T., Durst, F. (2007). LES and DNS of Melt Flow and Heat Transfer in Czochralski Crystal Growth. In: Nagel, W.E., Jäger, W., Resch, M. (eds) High Performance Computing in Science and Engineering ’06. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-36183-1_20
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DOI: https://doi.org/10.1007/978-3-540-36183-1_20
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