Why Is the Current State-of-the-art Not Adequate?
1. Time advance scheme is too
inefficient
- Every cell
is updated regardless of whether a change
has occurred
- Time step is not based on local conditions
2. Existing time advance schemes do
not allow
code-code coupling
3. The “curse” of Courant
condition
- physically the
system should be stable if there is no
change regardless of how fast information is propagating but numerically it is not
2
Months
3x1011
Ion Scales
Hybrid**
1.2x107 Years
1017
Electron Scales
Full Particle
(mi/me=200)
Run Time / 1 hour of Magnetosphere Time*
Memory Requirement (Bytes)
Resolution
Simulation
Model