NonlinearSolvers Introduction
This module contains both the time-stepping methods and the methods for solving steady problems. When solving a CFD problem, these are the functions that drive the code. The purpose of the physics modules is to evaluate the spatial residual. The purpose of the NonlinearSolvers is to solve the problem. The steady methods and implicit time-marching methods generally use some kind of Newton iteration to solve a nonlinear problem.
The first two pages describe the steady and unsteady methods, respectively, and the final pages describe the Newton implementation used by them.