Simulation Logs: Record__DivB - hyschive/gamer-fork GitHub Wiki
This file records the numerical errors of the divergence-free constraint on the magnetic field. The relative error is defined as Δξl|∇⋅B|/<|B|>, where B is the face-centered magnetic field of a cell and Δξl is the cell width along ξ on level l.
Example:
# Tolerated Error: 9.9999997e-06
#-------------------------------------------------------------------------
# Time Step AveError MaxError FailedCells
0.0000000e+00 0 0.0000000e+00 0.0000000e+00 0
1.7641872e-03 1 1.6332946e-08 5.8106949e-08 0
3.5260132e-03 2 2.1671077e-08 1.0531079e-07 0
5.2856565e-03 3 2.6458105e-08 1.1240161e-07 0
7.0427784e-03 4 3.0183041e-08 1.5688254e-07 0
8.7978840e-03 5 3.3473810e-08 1.6967800e-07 0
1.0550219e-02 6 3.6699682e-08 1.6826570e-07 0
1.2300350e-02 7 3.9571327e-08 2.0603242e-07 0
1.4047826e-02 8 4.2254163e-08 2.0667694e-07 0
1.5793136e-02 9 4.4946636e-08 2.2079354e-07 0
1.7535893e-02 10 4.7368575e-08 2.2033124e-07 0
Table format:
-
Time: physical time -
Step: number of root-level updates -
AveError: average (L2-norm) error of all leaf cells -
MaxError: maximum error among all leaf cells -
FailedCells: number of cells exceeding the Tolerated Error specified on the top of this file
Caution
Errors should be on the order of machine precision but may accumulate with time.