Normalized Residual Tolerance#

Normalized Residual Tolerance = <float>

Description / Usage#

This is the per matrix version of this card. This overrides Normalized Residual Tolerance for each matrix

This required card indicates the value of the L₂ norm of the global nonlinear residual vector that indicates termination of Newton’s method (i.e., convergence). The input parameter is defined as

<float>: tol, a non-negative floating point number ( tol ≥ 0.0 ) specifying the L₂ convergence tolerance for the global nonlinear residual vector.

The Normalized Residual Tolerance card is required; there is no default.

Examples#

Following is a sample card:

MATRIX = 1
    Normalized Residual Tolerance = 1.0e-8
    Number of EQ = 3

Technical Discussion#

Newton’s method is terminated when the global nonlinear residual falls below tol, or the maximum number of iterations specified in the Number of Newton Iterations is reached.