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Johann Turnow

Flow structures and heat transfer on dimpled surfaces

Universität Rostock, 2011

Abstract: The investigations of unsteady effects and its direct impact on heat transfer enhancement is the main subject of the work. Vortex structures and heat transfer mechanism in a turbulent flow over a single dimple and a staggered dimple array in a narrow channel have been investigated using Large Eddy Simulation (LES), Reynolds-averaged Navier-Stokes (RANS) simulation, POD method, Laser Doppler Velocimetry (LDV), time resolved pressure measurements and dye visualizations. Further a multi-objective design optimization has been performed for further improvement of the heat exchanger performance.

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