2011/11/04 by Daniel J. Price, Price, Daniel J.
Physics and Astronomy · #Astrophysics of Galaxies (astro-ph.GA) #Computational Physics (physics.comp-ph) #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #astro-ph.CO #astro-ph.GA #astro-ph.IM #physics.comp-ph
paper · pdf · doi:10.48550/arxiv.1111.1259
10 pages, 6 figures, proceedings of "Advances in Computational Astrophysics: methods, tools and outcomes", June 13-17, 2011, Cefalu, Sicily, Italy, eds. Capuzzo Dolcetta, Limongi, Tornambe & Giobbi
arxiv created 2011/11/04 · arxiv updated 2011/11/08
I discuss the key features of Smoothed Particle Hydrodynamics (SPH) as a numerical method - in particular the key differences between SPH and more standard grid based approaches - that are important to the practitioner. These include the exact treatment of advection, the absence of intrinsic dissipation, exact conservation and more subtle properties that arise from its Hamiltonian formulation such as the existence of a minimum energy state for the particles. The implications of each of these are discussed, showing how they can be both advantages and disadvantages.