### 11.2.1. General Solution

The flow chart shown below illustrates the general field solution process used in the CFX-Solver.

The solution of each set of field equations shown in the flow chart consists of two numerically intensive operations. For each time step:

1. Coefficient Generation: The nonlinear equations are linearized and assembled into the solution matrix.

2. Equation Solution: The linear equations are solved using an Algebraic Multigrid method.

When solving fields in the CFX-Solver, the outer (or time step) iteration is controlled by the physical time scale or time step for steady and transient analyses, respectively. Only one inner (linearization) iteration is performed per outer iteration in steady-state analyses, whereas multiple inner iterations are performed per time step in transient analyses.

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