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DTSTAMP:20190719T085745Z
LOCATION:HG D 3.2
DTSTART;TZID=Europe/Stockholm:20190614T140000
DTEND;TZID=Europe/Stockholm:20190614T143000
UID:submissions.pasc-conference.org_PASC19_sess157_msa281@linklings.com
SUMMARY:Prediction of Turbulent Flows and Acoustic Fields on HPC Systems
DESCRIPTION:Minisymposium\nComputer Science and Applied Mathematics, Emerg
 ing Application Domains, Physics, Engineering\n\nPrediction of Turbulent F
 lows and Acoustic Fields on HPC Systems\n\nMeinke, Schneiders, Niemoeller,
  Schlottke-Lakemper, Schröder\n\nThis paper presents an advanced methodolo
 gy for the simulation of turbulent flows and aero-acoustic noise. The comp
 utational method is based on Cartesian meshes with an immersed boundary fo
 rmulation, which allows to capture sharp interfaces of arbitrarily moving 
 objects. Adaptive meshes combined with dynamic load balancing allows an ef
 ficient use of HPC hardware. The prediction of aero-acoustic noise is obta
 ined by a fully coupled CFD/CAA method, where the two solvers for the flow
  and the acoustic fields share a common hierarchical mesh, which can be re
 fined independently. The domain decompositioning is based on a space filli
 ng curve, which partitions the joint mesh such that the exchange of inform
 ation between the solvers avoids parallel communication and requires only 
 local memory transfer. Details of the implementation on HPC hardware and t
 he performance will be presented with engineering application examples. Th
 e examples include the simulation of turbulent flows and the prediction of
  acoustic fields from axial fans and high speed jets with meshes containin
 g O(10^9) cells. <br />References: Schlottke-Lakemper et al., “A ful
 ly coupled hybrid computational aeroacoustics method on hierarchical Carte
 sian meshes”, Comp.&Fluids, 144:137-153, 2017. <br />Schneiders 
 et al., “Direct particle-fluid simulation of Kolmogorov-length- scal
 e size particles in decaying isotropic turbulence”, J.Fluid Mech., 8
 19:188-227, 2017.
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