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Numerical simulation of turbulent flow and heat transfer over rotating disks using a hybrid LES-RANS method

DOI: 10.1615/THMT-18.650
pages 625-634

L. Kappis
Chair of Modelling and Simulation, Department of Mechanical Engineering and Marine Technology, University of Rostock, Albert-Einstein-Str. 2, 18059 Rostock, Germany

Johann Turnow
Chair of Modeling and Simulation, Department of Mechanical Engineering and Marine Technology, University of Rostock, Albert-Einstein-Str. 2, 18055 Rostock, Germany

Nikolai Kornev
Chair of Modeling and Simulation, Department of Mechanical Engineering and Marine Technology, University of Rostock, Albert-Einstein-Str. 2, 18055 Rostock, Germany

Abstrakt

In this research, a fluid-cooled rotating disk of finite thickness is investigated considering varying angular and crossflow velocities. Turbulent flow and heat transfer are modeled by use of URANS, LES and a hybrid method (IDDES). Results revealed that by increasing the Reynolds number substantially, LES-modelling predicts strong divergency from the obtained experimental data even for refined grid resolutions. However, the use of the hybrid k-ω-SST-IDDES model allows a fairly accurate prediction of turbulent heat transfer as well for the stationary system as for the rotating disk even for high Reynolds numbers.

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