Embedding Lagrangian Sink Particles in Eulerian Grids
نویسندگان
چکیده
منابع مشابه
Embedding Lagrangian Sink Particles in Eulerian Grids
We introduce a new computational method for embedding Lagrangian sink particles into an Eulerian calculation. Simulations of gravitational collapse or accretion generally produce regions whose density greatly exceeds the mean density in the simulation. These dense regions require extremely small time steps to maintain numerical stability. Smoothed particle hydrodynamics (SPH) codes approach thi...
متن کاملLagrangian and Eulerian descriptions of inertial particles in random flows
Lagrangian and Eulerian descriptions of inertial particles in random flows S. A. Derevyanko a b , G. Falkovich d , K. Turitsyn c & S. Turitsyn a a Photonics Research Group, Aston University , Birmingham, B4 7ET, UK b Institute for Radiophysics and Electronics , Kharkov, Ukraine (on leave), 61085 c Landau Institute for Theoretical Physics , Moscow, 117940, Russian Federation d Physics of Complex...
متن کاملEmbedding grids in surfaces
We show that if a very large grid is embedded in a surface, then a large subgrid is embedded in a disc in the surface. This readily implies that: (a) a minor-minimal graph that does not embed in a given surface has no very large grid; and (b) a minor-minimal k-representative embedding in the surface has no very large grid. Similar arguments show (c) that if G is minimal with respect to crossing...
متن کاملLagrangian versus Eulerian integration errors
The possibility to use a Lagrangian frame to solve problems with large time-steps was successfully explored previously by the authors for the solution of homogeneous incompressible fluids and also for solving multi-fluid problems [28-30]. The strategy used by the authors was named Particle Finite Element Method second generation (PFEM-2). The objective of this paper is to demonstrate in which c...
متن کاملA subcell remapping method on staggered polygonal grids for arbitrary-Lagrangian–Eulerian methods
We describe a new remapping algorithm for use in arbitrary Lagrangian–Eulerian (ALE) simulations. The new features of this remapper are designed to complement a staggered-mesh Lagrangian phase in which the cells may be general polygons (in two dimensions), and which uses subcell discretizations to control unphysical mesh distortion and hourglassing. Our new remapping algorithm consists of three...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2004
ISSN: 0004-637X,1538-4357
DOI: 10.1086/421935