### 17.3.8. Model Override Parameters

`solve emag`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the solver solves the electromagnetic equations.
`solve energy`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the controller solves the energy equation.
`solve fluids`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the controller solves the hydrodynamics equations. Use if you have obtained convergence and you need to continue solving other equation groups.
`solve fsd`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the solver solves the flame surface density equation.
`solve masfrc`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the controller solves for mass fraction.
`solve mixture fraction`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the controller solves for mixture fraction mean and variance equations.
`solve postproc masfrc`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the controller solves the mass fraction equations in chemistry postprocessing. This flag affects only postprocessed components. The equations for regular components of the mixture are solved in the main iteration and may be controlled using the solve `masfrc parameter`.
`solve postproc tvariance`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the controller solves the temperature variance equation in chemistry postprocessing. This flag applies only if the temperature variance equation is solved as part of chemistry postprocessing. When solved as part of the main iteration, the corresponding solve temperature variance flag applies.
`solve radiation`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the controller solves the radiation equations
`solve reaction progress`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the controller solves for reaction progress equations. For details, see Other Parameters.
`solve scalar`
Type | Logical
Default Value | t (if running with Additional Variables)
Description | Flag for controlling whether or not the controller solves equations for Additional Variables.
`solve soot`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the controller solves equations for soot equations.
`solve temperature variance`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the controller solves for the temperature variance equation.
`solve turbulence`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the controller solves the turbulence model equations
`solve volfrc`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the controller solves the volume fraction equations
`solve wallscale`
Type | Logical
Default Value | t
Description | Flag for controlling whether or not the controller solves the wall scale and boundary scale equations. Note that these equations must be solved to access the Wall Distance and Boundary Distance variables. Detailed information on the wall scale equation is available at Wall and Boundary Distance Formulation in the CFX-Solver Theory Guide.

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