Mach 6 Hydrodynamic Turbulence at 2048^3
Alexei Kritsuk, Rick Wagner, Paolo Padoan & Mike Norman

Machines DataStar (SDSC) IBM Power 4
Data Analysis/Storage
BigBen (PSC) Cray XT3
25% Main Simulation/Data Analysis
Pople (PSC) SGI Altix
Data Analysis
Ranger (TACC) SUN Constellation Cluster
75% Main Simulation
Application ENZO
Method PPM
Grid Resolution 2048^3
Number of CPUs 4,096
Number of Time Steps 44,000
Number of Stored Flow Snapshots 100
Wall Clock Time
Based on Ranger performance
2 Weeks
CPU Hours
Based on Ranger performance

Images Plots Animations
Projected Gas Density
Each MPEG movie covers five dynamical times of evolution
S - reduced resolution 1024^2
L - full resolution 2048^2
The dynamic range for the density is about 5 dex
X-projection 015
X-projection 015
Y-projection 015
X-projection 025
Y-projection 025
X-projectS, 27M
Y-projectS, 29M
Z-projectS, 29M
X-projectL, 78M
Y-projectL, 84M
Z-projectL, 83M
Gas Density in a Thin Slice
Each MPEG movie covers five dynamical times of evolution
S - reduced resolution 1024^2
L - full resolution 2048^2
G - grey scale
C - color
The dynamic range for the projected density is 2 dex
X-slice 1000/015
X-slice 1000/015
X-slice 0100/025
X-slice 0100/025
X-slice 0100/025
X-sliceSC, 43M
X-sliceSG, 30M
Y-sliceSC, 42M
Y-sliceSG, 28M
Z-sliceSC, 35M
Z-sliceSG, 24M
X-sliceLG, 81M
Y-sliceLG, 77M
Z-sliceLC, 97M
Z-sliceLG, 69M
Time Evolution of Global Variables
EPS plots for the rms Mach number and max density
Red circles indicate a sample of 23 snapshots used to get time-average spectra
Mach Number
Max Density
Power Spectra
EPS plots for instantaneous and time-average power spectra of the velocity, energy transfer rate, and gas density
020 130 Mean
Energy Transfer:
020 130 Mean
020 130 Mean
Log Density:
020 130 Mean
Projected Density
Gas Density PDFs
EPS plot shows the density PDFs for a dozen of early snapshots and a lognormal approximation
Density PDF

This material is based upon work supported by the National Science Foundation under Grant No. 0607675.
Disclaimer: Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

Alexei Kritsuk
Last modified: Fri Aug 7 18:31:46 PDT 2009 Number of external visits since Apr 16 2008