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SUMMARY:Evolution of an gravitotional bound n-body system with DLA (Diffus
 ion Limited Aggregation) initial mass distribution using  GPU parralel com
 puting
DTSTART;VALUE=DATE-TIME:20121018T134500Z
DTEND;VALUE=DATE-TIME:20121018T150000Z
DTSTAMP;VALUE=DATE-TIME:20261010T233700Z
UID:indico-contribution-200@indico.ipb.ac.rs
DESCRIPTION:Speakers: Bogdan Alexandru Dumitru (Institute of Space Science
 )\, Ciprian Mitu (Institute of Space Science)\nIn this paper we present a 
 collection of algorithms to generate power law  mass distribution as initi
 al conditions for gravitational N-body simulations. This type of algorithm
 s are highly parallizable and can analyze large data customary on clusters
 . The input data will be high resolution images in the most used format in
  astrophysics\, FITS and diffusion limited aggregation generated clusters.
  The application will algorithm running on GPU (with CUDA and OpenCL)\, fo
 r the generation of initial mass distribution and fort the evolution of th
 e n-body sysytem. Data analysis and plotting is done in ROOT Framework. \n
        General scientific image on the formation and evolution of the gala
 xies is that they formed by gravitational collapse of matter. The study of
  the mass distribution of spiral galaxies will shade new light on the form
 ation and evolution of galaxies. The application will provide new data of 
 spiral arms and their morphology.  \n        The method is name all-pairs 
 that is a brute-force technique that evaluates all pair-wire interactions 
 among the n bodies. The all-pairs method is combined with a faster method 
 based on a far-field approximation of longer-range forces\, which is valid
  only between parts of the system that are well separated. Fast N-body alg
 orithms of this form include the Barnes-Hut method (BH) (Barnes and Hut 19
 86)\, the fast multipole method (FMM) (Greengard 1987)\, and the particle-
 mesh methods (Hockney and Eastwood 1981\, Darden et al. 1993). \n    The b
 enchmarks was done on an server with 4 GPU (Nvidia Tesla) with 480 cores e
 ach.\n    The tests was been maid on 480\, 960\, 1440\, 1920 cores on CUDA
  and OpenCL and the difference was 5-10% in CUDA favor.\n\nhttps://events.
 saifa.rs/event/291/contributions/200/
LOCATION:National Library of Serbia
URL:https://events.saifa.rs/event/291/contributions/200/
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