Print Email Facebook Twitter Large-eddy simulation of the high-Reynolds-number flow through a high-aspect-ratio cooling duct Title Large-eddy simulation of the high-Reynolds-number flow through a high-aspect-ratio cooling duct Author Kaller, Thomas (Technische Universität München) Pasquariello, Vito (Technische Universität München) Hickel, S. (TU Delft Aerodynamics) Adams, Nikolaus A. (Technische Universität München) Date 2017 Abstract We present well-resolved large-eddy-simulations (LES) of a straight, high-aspect-ratio cooling duct (HARCD) at a bulk Reynolds number of Re = 110 • 103 and an average Nusselt number of Nu = 371. The geometry and boundary conditions have been defined together with Rochlitz et al. (2015), who conducted the experimental measurements for this case. Water was chosen as coolant. The current investigation focuses on the influence of asymmetrical wall heating on the flow field and specifically on the influence of the turbulence-induced secondary flow on turbulent heat transfer, the spatial development of the temperature boundary layer and the accompanying viscosity modulation. Due to the viscosity drop in the vicinity of the heated wall we observe a decrease in turbulent length scales and in turbulence anisotropy, resulting in a decrease of turbulent mixing and the secondary flow strength along the duct. To reference this document use: http://resolver.tudelft.nl/uuid:f1564002-3d09-4f79-876b-bf6f2bf5d81d Publisher TSFP ISBN 9780000000002 Source 10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017, 2 Event 10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017, 2017-07-06 → 2017-07-09, Chicago, United States Part of collection Institutional Repository Document type conference paper Rights © 2017 Thomas Kaller, Vito Pasquariello, S. Hickel, Nikolaus A. Adams Files PDF 258.pdf 15.3 MB Close viewer /islandora/object/uuid:f1564002-3d09-4f79-876b-bf6f2bf5d81d/datastream/OBJ/view