# BrineFluidProperties

Fluid properties for brine

A high-precision and consistent formulation for fluid properties for binary salt (NaCl) and water mixtures at pressures and temperatures of interest.

Density, enthalpy, internal energy and specific heat capacity are calculated using the formulations provided in Driesner and Heinrich (2007) and Driesner (2007).

Viscosity and thermal conductivity of brine are calculated using the formulation of Phillips et al. (1981).

Brine vapor pressure is calculated using the formulation presented in Haas Jr (1976).

Solubility of solid salt (halite) in water is given by Potter et al. (1977).

By default, the BrineFluidProperties UserObject uses the Water97FluidProperties and NaClFluidProperties which are constructed internally, so do not have to be supplied by the user.

The BrineFluidProperties UserObject takes an optional parameter water_fp which can be used to pass a specific water formulation. This allows the user to use a tabulated version of the water properties (using TabulatedFluidProperties), which can significantly speed up the calculation of brine properties.

## Range of validity

The BrineFluidProperties UserObject is valid for:

• 273.15 K T 1273.15 K,

• 0.1 MPa p 500 MPa,

• 0 x 1

## Input Parameters

• allow_imperfect_jacobiansFalsetrue to allow unimplemented property derivative terms to be set to zero for the AD API

Default:False

C++ Type:bool

Options:

Description:true to allow unimplemented property derivative terms to be set to zero for the AD API

• water_fpThe name of the FluidProperties UserObject for water

C++ Type:UserObjectName

Options:

Description:The name of the FluidProperties UserObject for water

• execute_onTIMESTEP_ENDThe list of flag(s) indicating when this object should be executed, the available options include NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM.

Default:TIMESTEP_END

C++ Type:ExecFlagEnum

Options:NONE INITIAL LINEAR NONLINEAR TIMESTEP_END TIMESTEP_BEGIN FINAL CUSTOM

Description:The list of flag(s) indicating when this object should be executed, the available options include NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM.

### Optional Parameters

• control_tagsAdds user-defined labels for accessing object parameters via control logic.

C++ Type:std::vector

Options:

Description:Adds user-defined labels for accessing object parameters via control logic.

• enableTrueSet the enabled status of the MooseObject.

Default:True

C++ Type:bool

Options:

Description:Set the enabled status of the MooseObject.

• allow_duplicate_execution_on_initialFalseIn the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).

Default:False

C++ Type:bool

Options:

Description:In the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).

• force_preauxFalseForces the GeneralUserObject to be executed in PREAUX

Default:False

C++ Type:bool

Options:

Description:Forces the GeneralUserObject to be executed in PREAUX

• use_displaced_meshFalseWhether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.

Default:False

C++ Type:bool

Options:

Description:Whether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.

1. T. Driesner. The system H$_2$O-NaCl. Part II: Correlations for molar volume, enthalpy, and isobaric heat capacity from 0 to 1000 C, 1 to 5000 bar, and 0 to 1 X$_NaCl$. Geochimica et Cosmochimica Acta, 71:4902–4919, 2007.[BibTeX]
2. T. Driesner and C. A. Heinrich. The system H$_2$O-NaCl. Part I: Correlation formulae for phase relations in temperature-pressure-composition space from 0 to 1000 C, 0 to 5000 bar, and 0 to 1 X$_NaCl$. Geochimica et Cosmochimica Acta, 71:4880–4901, 2007.[BibTeX]
3. J. L. Haas Jr. Physical properties of the coexisting phases and thermochemical properties of the H$_2$O component in boiling NaCl solutions. Technical Report USGS Bulletin 1421-A, United States Geological Survey, 1976.[BibTeX]