Scripted HTML version of Foils prepared 27 August 1996

Foil 144 BBH: Computational Challenge

From CPS615-Introduction-Course,Driving Technology and HPCC Current Status and Futures CPS615 Basic Simulation Track for Computational Science -- Fall Semester 96. by Geoffrey C. Fox *
Secs 48
Problem size: Analysis with Uniform Grid
  • Requested spatial resolution: 50 mesh points per black hole (radius of event horizon, R)
  • To extract gravitational waves a space region of ~100 R is necessary
  • Number of mesh points: (50 x100)3 => ~ 1011
  • Time evolution: 50,000 steps (corresponds to distance ~1000R with dt=dx)
  • Total number of events: ~1016
  • Floating point operations per event: ~104
  • Total FLOP count: 1020 => 30 years of a Teraflop machine!
Solution: Adaptive Mesh Refinement
  • one week of a Teraflop machine

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