### 2.2.5. Solver Tab

Select the Solver tab to configure solver settings. If this tab is not visible, ensure that in the Run Definition tab, Show Advanced Controls is selected.

- Under Run Priority, you can select `Idle`, `Low`, `Standard` or `High`. For a discussion of these priorities as well as how you can change them after the execution of the solver has started, see The cfx5control Application in the CFX-Solver Manager User's Guide.

- You can override the precision set on the Run Definition tab by selecting Override Default Precision and then setting the precision. For details on the precision of executables, see Double-Precision Executables.

- You can override the problem size capability (“large problem” or not) set on the Run Definition tab by selecting Override Default Large Problem Setting and then setting the problem size capability (via the Large Problem check box). For details on the problem size capability of the executables, see Large Problem Executables.

- If required, you can adjust the memory configuration under Solver Memory. For details, see Configuring Memory for the CFX-Solver in the CFX-Solver Manager User's Guide.

- You can optionally choose a custom solver executable. Under Custom Solver Options, click Browse to select a Custom Executable.

- Command line arguments that must be supplied to the program can be entered under Solver Arguments.

Note: Note that the CFX-Solver’s `-ccl` command line argument can be used to alter the physics CCL but cannot be used to modify the way that the mesh is defined or the way that the physics CCL relates to the topology of the mesh that is stored in the solver input file. The changes that cannot be made using the `-ccl` command line argument include:

- Changing the underlying geometry

- Recreating the mesh with different parameters, mesh controls, or inflated boundaries

- Adding a new physics location or removing an existing physics location such as a domain (DOMAIN), subdomain (SUBDOMAIN), boundary condition (BOUNDARY), or domain interface (DOMAIN INTERFACE)

- Changing the name of any subdomain or boundary condition, including the default boundary condition

- Changing the locations of the physics, for example, by modifying the locations of domains, subdomains, boundaries, or domain interfaces

In order to make such changes, you must rewrite the solver input file using CFX-Pre.

Note that changing the type of boundary condition is possible with the `-ccl` command line argument.

Note: The Custom Executable and Solver Arguments settings are only available in the CFX-Solver Manager in stand-alone mode.

Release 18.2 - © ANSYS, Inc. All rights reserved.