1.2 KiB
1.2 KiB
N-Body project - Checklist
Task 1
- Compute characteristic quantities/scales
- Compare analytical model and particle density distribution
- Compute forces through nbody simulation
- vary softening length and compare results
- compare with the analytical expectation from Newtons 2nd law
- compute the relaxation time
Task 2 (particle mesh)
- Choose reasonable units
- Implement force computation on mesh
- Find optimal mesh size
- Compare with direct nbody simulation
- Time integration for direct method AND mesh method
Task 2 (tree code)
- Implement force computation with multipole expansion
- Find optimal grouping criterion
- Compare with direct nbody simulation
- Time integration for direct method AND tree method
Questions
- Procedure for each time step of a mesh simulation? Potential on mesh -> forces on particles -> update particle positions -> new mesh potential? or skip the creation of particles in each time step?
- How to represent the time evolution of the system?
- plot total energy vs time
- plot particle positions?
- What is the parameter a of the Hernquist model?