Learning Computer Learning Computer Simulation with an Simulation with an MDGRAPE AcceleratorMDGRAPE Accelerator

Tetsu Narumi1, Fumikazu Konishi2, Ryo Umetsu2, Makoto Taiji2,Toshikazu Ebisuzaki3, Kenji Yasuoka1

1Department of Mechanical Engineering, Keio University2Genomic Sciences Center, RIKEN3Computational Astrophysics Lab., RIKEN

BackgroundBackground

Computer Simulation becomes important◦Fluid dynamics (Car, Airplane)◦Structural analysis (Building, Mobile

phone)◦N-body simulation (Droplet of inkjet

printer)Little experience on simulation at school

Hands-on Simulation

NN-body Simulation-body Simulation

Astrophysical simulation◦ Galaxy collision◦ Cosmology

Molecular dynamics simulation◦ Bio sciences (protein folding)◦ Nano sciences (carbon nano tube)

Requires Huge Computational Power

Tool for Simulation : Tool for Simulation : MDGRAPEMDGRAPEAccelerator for N-body simulation

◦ Gravitational or molecular dynamics simulation◦ Fast and good performance/cost◦ Developed by University of Tokyo, RIKEN, NAOJ

Host Computer(PC)

Accelerator(MDGRAPE)

Forcecalculation

Newton’sEquations ofMotion, etc.

Positions

Forces

MDGRAPE at HandMDGRAPE at HandExpensive hardware

Freely distributed by RIKEN

Difficult to useAll-in-one CDROM (Bootable, Device driver, Demos, Sources)

MDGRAPE-2Board

DemonstrationDemonstrationAstrophysical simulation

◦ Galaxy collision◦ Developed by Toshiyuki Takahei

Molecular dynamics simulation◦ NaCl◦ Developed by Takahiro Koishi, Fukui Univ.

OS : Customized KNOPPIX◦ CD bootable linux (http://www.knopper.net/)◦ Customized by Ryo Umetsu, RIKEN GSC

SummarySummaryPropose ‘Hands-on Simulation’

◦Learning simulation at school is importantTools for N-body simulation are ready

◦Free MDGRAPE-2 board◦All-in-one CDROM

Need Help for Making Contents, Lecturing at School etc.