Direct Numerical Simulation of Non-Linear Transitional Stages in an Experimentally Investigated Laminar Separation Bubble

Olaf Marxen () and Ulrich Rist
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Olaf Marxen: Universität Stuttgart, Institut für Aerodynamik und Gasdynamik
Ulrich Rist: Universität Stuttgart, Institut für Aerodynamik und Gasdynamik

A chapter in High Performance Computing in Science and Engineering’ 05, 2006, pp 103-117 from Springer

Abstract: Summary This paper details a joint numerical and experimental effort to investigate a transition process in a laminar separation bubble, with the emphasis being put on the numerical contribution. A laminar separation bubble is formed if a laminar boundary layer separates in a region of adverse pressure gradient on a flat plate and undergoes transition, leading to a reattached turbulent boundary layer. Development of disturbances during the transition process in such a separation bubble is studied by means of direct numerical simulation with controlled disturbance input. Focus is put on the stage of non-linear development of these perturbations, for which a detailed comparison between numerical and experimental results is given. Beside physical phenomena like shear-layer roll-up and vortex shedding, computational aspects such as the performance of the numerical code on supercomputers are treated.

Keywords: Particle Image Velocimetry; Direct Numerical Simulation; Separation Bubble; Adverse Pressure Gradient; Direct Numerical Simulation Result (search for similar items in EconPapers)
Date: 2006
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-540-29064-3_8

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DOI: 10.1007/3-540-29064-8_8

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