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BEGIN:VEVENT
DTSTAMP:20260202T201257Z
LOCATION:Art of HPC - Plaza Lobby
DTSTART;TZID=America/Chicago:20251121T080000
DTEND;TZID=America/Chicago:20251121T120000
UID:submissions.supercomputing.org_SC25_sess608_art110@linklings.com
SUMMARY:Turbulent Strata
DESCRIPTION:Miles Couchman (York University), Murali Gopalakrishnan Meena 
 (Oak Ridge National Laboratory (ORNL)), and Stephen de Bruyn Kops (Univers
 ity of Massachusetts Amherst)\n\nWe here visualize a snapshot in time from
  one of the largest numerical simulations of stratified turbulence perform
 ed to date, generated by directly simulating the Navier–Stokes equations o
 n the Frontier supercomputer (Oak Ridge National Laboratory) through an IN
 CITE award. Stratified turbulence refers to chaotic motion arising in a fl
 uid of variable density, where buoyancy forces strongly influence the flow
  dynamics. This type of turbulence plays a central role in a variety of na
 tural and industrial processes, such as influencing the dispersion of heat
  and pollutants in the ocean and atmosphere, but remains poorly understood
  due to the vast range of interacting length scales that must be resolved.
 \n\nA zoomed-in vertical slice of the 6 trillion grid point simulation is 
 shown here, yielding unprecedented resolution into the rich variety of flo
 w structures underpinning the turbulence. Energy is injected at large scal
 es to drive the turbulence, which cascades down through progressively smal
 ler structures until eventually being dissipated by viscosity. The colors 
 in the visualization show perturbations to the fluid’s density relative to
  the stable background gradient: red and blue indicate lighter and denser 
 fluid, respectively.\n\nThis simulation is one of the first to fully resol
 ve stratified turbulence at high Prandtl number, meaning that momentum dif
 fuses significantly faster than density, as is characteristic of ocean flo
 ws. A challenge in simulating high Prandtl flows is that the density field
  develops extremely fine structures that require immense resolution to cap
 ture, necessitating the use of Frontier.\n\nTag: Art of HPC\n\nRecording: 
 Not Livestreamed, Not Recorded\n\nRegistration Category: Technical Program
  Reg Pass, Workshop Reg Pass, Tutorial Reg Pass, Exhibits Reg Pass\n\n
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