Direct Numerical Simulation of Boundary Layer Transition in Streamwise Corner-Flow

Oliver Schmidt (), Björn Selent and Ulrich Rist
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Oliver Schmidt: University of Stuttgart, Institute of Aerodynamics and Gas Dynamics
Björn Selent: University of Stuttgart, Institute of Aerodynamics and Gas Dynamics
Ulrich Rist: University of Stuttgart, Institute of Aerodynamics and Gas Dynamics

A chapter in High Performance Computing in Science and Engineering ‘13, 2013, pp 337-348 from Springer

Abstract: Abstract The process of laminar-turbulent transition in streamwise corner-flow is considered my means of direct numerical simulation (DNS). It is shown that transition triggered by harmonic forcing originates from the near-corner region in the shape of a turbulent wedge. The resulting mean flow deformation takes the shape of an outward bulge, and can be linked to experimental observations. A spectral analysis of the transient flow data is undertaken to elaborate on non-linear interactions, modal structures and spectral energy distribution. Additionally, the massive parallel performance of the DNS code on the Cray XE6 supercomputer is discussed and compared with the performance on previous vector architectures.

Keywords: Direct Numerical Simulation; Transitional Flow; Hairpin Vortex; Dynamic Mode Decomposition; Flow Deformation (search for similar items in EconPapers)
Date: 2013
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-319-02165-2_23

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DOI: 10.1007/978-3-319-02165-2_23

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