Features gadget
1. Hierarchical multipolar (on the basis of a geometric October-tree) for gravitational forces.
2. Optional TreePM method, where the tree is used for short-range gravitational forces while only long-term forces are calculated with an FFT-based particle-mesh (h) regime. A second layer PM may be placed on a high resolution region "zoom'-simulations.
3. Periodic boundary conditions, either through the summation Ewald technical or based on the FFT algorithm used in the system TreePM. The simulations only follow the dynamics of gas without self-gravity can be carried out periodically, boxes with arbitrary aspect ratios, and also in 2D, if you wish.
4. Lissées particle hydrodynamics fully with smoothing lengths adaptation and a new formulation of the conservation of the entropy of SPH.
Signal speed setting artificial viscosity, as suggested by Monaghan.
5. Individual timesteps for all particles. Under the TreePM, long distance and short-range forces are integrated at various timesteps.
6. Workload balanced domain decomposition and updates dynamic tree.
7. Effective the cell opening criteria of gravity tree walk.
8. Support for parallel I / O and a number of different output formats, including HDF5 format.
9. Flexible control of all options code by a free-format parameterfile.
10. Portable, well documented and easily extensible code, relying only on ANSI C language features and MPI-1, 0 is the communication.
11. High-speed computing crude and relatively low consumption of memory. In particular, significant improvements in resource consumption compared with HO-1 were achieved.
12. The code May be executed on an arbitrary number of processors, with a restriction of powers of two. It May also be implemented on a single processor in serial fashion.
13. Rapid method for producing a gravity "of glass."
SPH simulations can be exploited in packs periodic arbitrary aspect ratio, or 2D, if you wish.
There were also older versions of the code that supported the special-purpose equipment grapes, in the form of grape-3 and Grape-6. However, this feature is not included in the current version for the moment.
1. Hierarchical multipolar (on the basis of a geometric October-tree) for gravitational forces.
2. Optional TreePM method, where the tree is used for short-range gravitational forces while only long-term forces are calculated with an FFT-based particle-mesh (h) regime. A second layer PM may be placed on a high resolution region "zoom'-simulations.
3. Periodic boundary conditions, either through the summation Ewald technical or based on the FFT algorithm used in the system TreePM. The simulations only follow the dynamics of gas without self-gravity can be carried out periodically, boxes with arbitrary aspect ratios, and also in 2D, if you wish.
4. Lissées particle hydrodynamics fully with smoothing lengths adaptation and a new formulation of the conservation of the entropy of SPH.
Signal speed setting artificial viscosity, as suggested by Monaghan.
5. Individual timesteps for all particles. Under the TreePM, long distance and short-range forces are integrated at various timesteps.
6. Workload balanced domain decomposition and updates dynamic tree.
7. Effective the cell opening criteria of gravity tree walk.
8. Support for parallel I / O and a number of different output formats, including HDF5 format.
9. Flexible control of all options code by a free-format parameterfile.
10. Portable, well documented and easily extensible code, relying only on ANSI C language features and MPI-1, 0 is the communication.
11. High-speed computing crude and relatively low consumption of memory. In particular, significant improvements in resource consumption compared with HO-1 were achieved.
12. The code May be executed on an arbitrary number of processors, with a restriction of powers of two. It May also be implemented on a single processor in serial fashion.
13. Rapid method for producing a gravity "of glass."
SPH simulations can be exploited in packs periodic arbitrary aspect ratio, or 2D, if you wish.
There were also older versions of the code that supported the special-purpose equipment grapes, in the form of grape-3 and Grape-6. However, this feature is not included in the current version for the moment.
