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LES and DNS of melt flow and heat transfer in Czochralski crystal growth. (English) Zbl 1391.76241
Nagel, Wolfgang E. (ed.) et al., High performance computing in science and engineering ’06. Transactions of the High Performance Computing Center, Stuttgart (HLRS) 2006. Berlin: Springer (ISBN 3-540-36165-0/hbk). 279-291 (2007).
Summary: 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 LESOCC, 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 \(8\times 10^6\) 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.
For the entire collection see [Zbl 1104.76029].

76F65 Direct numerical and large eddy simulation of turbulence
76T99 Multiphase and multicomponent flows
76M12 Finite volume methods applied to problems in fluid mechanics
80A20 Heat and mass transfer, heat flow (MSC2010)
Full Text: DOI
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