Simulation Logs: Record__DivB

This file records the numerical errors of the divergence-free constraint on the magnetic field. The relative error is defined as Δξ_l|∇⋅B|/<|B|>, where B is the face-centered magnetic field of a cell and Δξ_l 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.

Links

• Simulation Logs