6533b7d7fe1ef96bd1267956
RESEARCH PRODUCT
Three-dimensional simulation of polytropic accretion discs
Diego MolteniGaetano BelvedereG. Lanzafamesubject
PhysicsAccretion (meteorology)Plane (geometry)Boundary (topology)Astronomy and AstrophysicsPolytropic processIdeal gasSmoothed-particle hydrodynamicsComputational astrophysicsClassical mechanicsSpace and Planetary ScienceBinary starAstrophysics::Earth and Planetary AstrophysicsAstrophysics::Galaxy Astrophysicsdescription
Three-dimensional simulations of the formation and evolution of accretion discs in close binary systems,realised with the Smoothed Particle Hydrodynamics method to solve the fluid dynamic equations, are presented. Although the runs presented here refer to an ideal gas with different polytropic indexes, and constitute the first stage of more physically complex forthcoming simulations, they nervertheless give some interesting results: the disc structure and dynamics are in agreement with standard models only for small γ-values; as a consequence of the z-resolution it is found that disc formation is inhibited for γ ≥ 1.2, which means that some 2 D simulations of polytropic discs are meaningless; the disc is slightly asymmetric in the x-y plane and its profile is irregular and pulsating at the outer boundary
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1991-04-15 | Monthly Notices of the Royal Astronomical Society |