### 36.5.5. Solver Parameters

#### 36.5.5.1. Advection Scheme

For details, see Advection Scheme Selection in the CFX-Solver Modeling Guide.

#### 36.5.5.2. Convergence Control

This option is only available for steady-state simulations and determines how the timestep size is used to aid convergence. You can select `Automatic` (timestep size controlled by the solver) or `Physical Timescale` (enter a timestep value).

#### 36.5.5.3. Time Scale Option

This option is only available for steady-state simulations. The automatic time scale algorithm can be either conservative or aggressive. For details, see Automatic Time Scale Calculation in the CFX-Solver Theory Guide.

#### 36.5.5.4. Max. Coeff. Loops

This option is only available for transient simulations. With a default value of 10, this option determines the maximum number of iterations per timestep. For details, see Max. Iter. Per Step in the CFX-Solver Modeling Guide.

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