- weight_fraction_KWeight fraction of potassium in NaK. Only eutectic is implemented (X_K = 0.778)
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Weight fraction of potassium in NaK. Only eutectic is implemented (X_K = 0.778)
NaKFluidProperties
Fluid properties for NaK
These properties are based on experiments reported in the Handbook on NaK (Bomelburg et al., 1972). Most properties only depend on temperature; the fluid is considered incompressible. The fluid properties are summarized in Table 1, which reports the formulas used and their origin.
Table 1: Table of properties and references to the equations in (Bomelburg et al., 1972).
| Properties | Equation | Equation # |
|---|---|---|
| Density liquid Na, (kg/m^3) | ( in C) | Equation 1.5 |
| Density liquid K, (kg/m^3) | ( in C) | Equation 1.8 |
| Density liquid NaK, (kg/m^3) | Equation 1.9 | |
| Viscosity, (Pa-s) | See handbook | Equation 1.18 - 1.19 |
| Thermal Conductivity, (W/m-K) | ( in C) | Equation 1.53 |
| Isobaric Specific Heat, (J/kg-K) | ( in C) | Equation 1.59 |
Range of validity
The reported range of validity is specified for each property:
Density liquid Na 210 C T 1100 C
Density liquid K 63.2 C T 1250 C
Viscosity NaK 100 C T
Thermal conductivity 150 C T 680 C
Isobaric Specific Heat: unspecified. Measured from 0 to 800 C
Uncertainties of NaK Fluid Properties
The reported uncertainties in (Bomelburg et al., 1972) for NaK fluid properties are in Table 2.
commentnote
Many NaK properties are computed from a mix of Na and K properties and the uncertainty is only reported for these individual properties. We report it here, and the user will have to perform uncertainty propagation to obtain the uncertainties for the eutectic.
Table 2: Uncertainties reported in (Bomelburg et al., 1972).
| Properties | Uncertainties |
|---|---|
| Density liquid Na | 0.14-0.18% |
| Density liquid K | 0.25% |
| Viscosity liquid Na | 3.5e-6 - 6.5e-6 Pa.s |
| Viscosity liquid K | 7e-6 - 1.7e-5 Pa.s |
| Thermal Conductivity | 0.8% |
| Isobaric Specific Heat Na | 0.4% |
| Isobaric Specific Heat K | 2-5% |
Input Parameters
- T_initial_guess400Temperature initial guess for Newton Method variable set conversion
Default:400
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Temperature initial guess for Newton Method variable set conversion
- max_newton_its100Maximum number of Newton iterations for variable set conversions
Default:100
C++ Type:unsigned int
Controllable:No
Description:Maximum number of Newton iterations for variable set conversions
- p_initial_guess200000Pressure initial guess for Newton Method variable set conversion
Default:200000
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Pressure initial guess for Newton Method variable set conversion
- tolerance1e-08Tolerance for 2D Newton variable set conversion
Default:1e-08
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Tolerance for 2D Newton variable set conversion
Variable Set Conversions Newton Solve Parameters
- allow_imperfect_jacobiansFalsetrue to allow unimplemented property derivative terms to be set to zero for the AD API
Default:False
C++ Type:bool
Controllable:No
Description:true to allow unimplemented property derivative terms to be set to zero for the AD API
- control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector<std::string>
Controllable:No
Description:Adds user-defined labels for accessing object parameters via control logic.
- enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Controllable:Yes
Description:Set the enabled status of the MooseObject.
- fp_typesingle-phase-fpType of the fluid property object
Default:single-phase-fp
C++ Type:FPType
Controllable:No
Description:Type of the fluid property object
Advanced Parameters
- prop_getter_suffixAn optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.
C++ Type:MaterialPropertyName
Unit:(no unit assumed)
Controllable:No
Description:An optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.
- use_interpolated_stateFalseFor the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.
Default:False
C++ Type:bool
Controllable:No
Description:For the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.
Material Property Retrieval Parameters
References
- H.J. Bomelburg, C.R.F. Smith, H.N. Royden, V.A. Swanson, A.W. Thiele, and R.J. Tuttle.
Sodium-nak engineering handbook volume i sodium chemistry and physical properties, chapter 1: physical properties.
Technical Report ISBN 0 677 03020 4, Under the auspices of the United States Atomic Energy Commission, 1972.[BibTeX]