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DTSTART;TZID=Europe/Stockholm:20240603T113000
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UID:submissions.pasc-conference.org_PASC24_sess161_msa180@linklings.com
SUMMARY:A New Lagrangian-Based Approach to Studying Highly-Turbulent Fluid
  Flows
DESCRIPTION:Minisymposium\n\nMatthias Frey and David Dritschel (University
  of St Andrews) and Steven Böing (University of Leeds)\n\nDespite their in
 herent diffusivity and the additional effort required for modelling turbul
 ent eddies on the subgrid scale, Eulerian-based approaches are nowadays wi
 dely accepted tools for the simulation of turbulent fluid flows. Lagrangia
 n methods, on the other hand, represent a viable alternative as they expli
 citly model the small-scale turbulence at the cost of higher computational
  complexity. In this talk I present a new Lagrangian-based approach that i
 s based on deformable elliptical parcels which has proven to be highly eff
 ective in resolving turbulence. The Elliptical Parcel-In-Cell (EPIC) metho
 d represents a fluid flow with a set of space-filling ellipsoids that defo
 rm due to the local strain (velocity gradient). While extremely elongated 
 parcels are split, very small parcels are merged with their nearest other 
 parcel, resulting in a natural process of turbulent mixing. Performance be
 nchmarkswill demonstrate its scalability up to 16,384 cores.\n\nDomain: En
 gineering, Physics, Computational Methods and Applied Mathematics\n\nSessi
 on Chair: Andreas Adelmann (Paul Scherrer Institute, ETH Zurich)
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