"nlsolver" block

The nonlinear solver is configured in the JSON block "nlsolver".

json { "nlsolver": { "type": "newton", "maxiters": 50, "abs-tolerance": 5.0e-7, "rel-tolerance": 5.0e-10, "s-tolerance": 0.0 } }

Options

• "type": optional string. If omitted, AsFem falls back to its default nonlinear solver.
• "maxiters": optional integer. Default is 25.
• "abs-tolerance": optional floating-point value. Default is 7.0e-7.
• "rel-tolerance": optional floating-point value. Default is 1.0e-9.
• "s-tolerance": optional floating-point value. Default is 0.0.

The old solver= option is no longer part of "nlsolver". Linear solver settings now belong to the separate "linearsolver" block.

Supported nonlinear solver types

text asfem newton newton-ls newton-al newton-tr newton-secant newton-cg newton-gmres richardson ncg bfgs

In the current parser, any type string containing bfgs is treated as the BFGS solver.