ChaNGa

'''ChaNGa (Charm N-body GrAvity solver)''' is a computer program to perform collisionless ''N''-body simulations. It can perform cosmological simulations with periodic boundary conditions in comoving coordinates or simulations of isolated stellar systems. It is based on the Barnes–Hut algorithm and uses Ewald summation for periodic forces.

ChaNGa makes use of the Charm++ parallel programming system, including its dynamic load balancing schemes, in order to scale to large processor configurations. Simulation results have been reported on up to 20,000 IBM Bluegene/L processors [https://web.archive.org/web/20080512011208/http://charm.cs.uiuc.edu/papers/ChaNGaIPDPS08.shtml].

== More information ==

For more information on obtaining, building and running ChaNGa, please see the Wiki documentation at [https://web.archive.org/web/20070205093323/http://librarian.phys.washington.edu/astro/index.php/Research%3AChaNGa].

==See also== {{Portal|Physics}} * PKDGRAV [http://www-hpcc.astro.washington.edu/faculty/trq/brandon/pkdgrav.html] * GADGET * GRAPE

==External links== * [http://www-hpcc.astro.washington.edu/tools/changa.html University of Washington ChaNGa website] * [http://charm.cs.uiuc.edu Charm++ web page at the Parallel Programming Lab, UIUC] * [https://web.archive.org/web/20070205093323/http://librarian.phys.washington.edu/astro/index.php/Research%3AChaNGa ChaNGa Wiki documentation]

Category:Physical cosmology Category:Cosmological simulation