Large-eddy Simulation of Incompressible Flow Around a Sphere with Trip Wire at Re = 50 000

M. Torlak, G. Jensen and I. Hadžić
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M. Torlak: TU Hamburg Harburg, AB Fluiddynamik und Schiffstheorie
G. Jensen: TU Hamburg Harburg, AB Fluiddynamik und Schiffstheorie
I. Hadžić: TU Hamburg Harburg, AB Fluiddynamik und Schiffstheorie

A chapter in High Performance Computing in Science and Engineering’ 04, 2005, pp 189-200 from Springer

Abstract: Abstract In this work the large-eddy simulation (LES) is used to investigate incompressible flow around a sphere with trip wire. The sphere is located in a channel with square cross-section, and the bulk Reynolds number is Re = 50 000. The computational effort implied by demands for sufficient spatial and temporal resolution of the flow structures requires parallel runs on a high-performance computer. The numerical results are compared to the experimental ones in order to provide reliable data for testing, calibrating and improvement of statistical turbulence models. The time-averaged LES-results and the measured data obtained by the laser-Doppler-anemometry (LDA) for the velocity and the Reynolds-stress components are in reasonable agreement. Accuracy of the predicted mean-flow velocity component is particularly good. Comparison of the Reynolds stresses shows certain deviations in the far wake, agreement is however acceptable from the qualitative point of view.

Keywords: Reynolds Stress; Local Refinement; Smooth Sphere; Single Program Multiple Data; Frontal Stagnation Point (search for similar items in EconPapers)
Date: 2005
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-540-26589-4_20

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DOI: 10.1007/3-540-26589-9_20

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