2006/02/06 by Serge Viau, S. Viau, Pierre Bastien +2 · 2 citations
Engineering · Environmental Science · Physics and Astronomy · #Astrophysics and Star Formation Studies #Atmospheric aerosols and clouds #Fluid Dynamics Simulations and Interactions #astro-ph
paper · pdf · doi:10.1086/499328
published as Astrophys.J. 639 (2006) 559-570 · 25 pages, 9 figures
arxiv created 2006/02/06 · openalex publication_date 2006/02/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
An implicit method for radiative transfer in SPH is described. The diffusion approximation is used, and the hydrodynamic calculations are performed by a fully three-dimensional SPH code. Instead of the energy equation of state for an ideal gas, various energy states and the dissociation of hydrogen molecules are considered in the energy calculation for a more realistic temperature and pressure determination. In order to test the implicit code, we have performed nonisothermal collapse simulations of a centrally condensed cloud and have compared our results with those of finite difference calculations performed by Myhill & Boss. The results produced by the two completely different numerical methods agree well with each other.