### 4.4.1. ANSYS Field Solver Plots

These plots are only produced when the solid physics is set to use large displacements or when other nonlinear analyses are performed. It shows convergence information from CFX-Solver. Full details of the quantities plotted are described in Newton-Raphson Procedure in the Mechanical APDL Theory Reference.

In general, the CRIT quantities are the convergence criteria for each relevant variable. The L2/L1/INF quantities represent the L2 Norm/L1 Norm/Infinite Norm (respectively) of the relevant variable. The `CNVTOL` command is used to specify a tolerance value applied when calculating the CRIT quantities and the desired norm. Note that the default is the L2 Norm if the ANSYS input file was produced by ANSYS Mechanical. Convergence is realized when the desired norm is below the CRIT quantity.

The X axis of the plot is the cumulative iteration number for ANSYS, which does not correspond to timesteps, coupling steps, or stagger iterations. Several ANSYS iterations will be performed for each timestep or coupling step, depending on how quickly ANSYS converges. You will usually see a somewhat spiky plot, as each quantity will be unconverged at the start of each time or coupling step, and then convergence will improve.

Several ANSYS Field Solver plots may be present, depending on the physics being solved within ANSYS.

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