## FCSys.Species.'SO3-'.Ionomer

C19HF37O5S- ionomer

### Information

Extends from Modelica.Icons.Package (Icon for standard packages).

### Package Content

Name | Description
--- | ---
Fixed | Fixed properties

## FCSys.Species.'SO3-'.Ionomer.Fixed

Fixed properties

### Information

Assumptions:

1. The thermal independity and thermal resistivity are fixed (e.g., independent of thermodynamic state).

The default thermal resistivity (θ = `U.m*U.K/(0.16*U.W)`) is of dry Nafion 115 [Kandlikar2009, p. 1277].

For more information, please see the Species model.

Extends from Solid (Base model for an inert, stationary solid).

### Parameters

Type | Name | Default | Description
--- | --- | --- | ---
Integer | n_inter | 0 | Number of exchange connections with other phases
Geometry
NumberAbsolute | epsilon | 0.25 | Volumetric fill fraction [1]
Length | kL[:] | L[cartTrans] | Effective transport length [L]
Material properties
replaceable package Data | Characteristics.'SO3-'.Ionomer | Characteristic data
Independence factors
NumberAbsolute | k_intra_Phi[n_intra, n_trans] | ones(n_intra, n_trans) | For translational exchange among species within the phase [1]
NumberAbsolute | k_intra_Q[n_intra] | ones(n_intra) | For thermal exchange among species within the phase [1]
Initialization
Velocity | phi.start[n_trans] | 0 | Velocity [L/T]
Assumptions
Integer | n_trans | 1 | Number of transport axes
Formulation of the conservation equations
ConsThermo | consEnergy | ConsThermo.dynamic | Energy
Initialization
TemperatureAbsolute | T_IC |  | Initial temperature [L2.M/(N.T2)]

### Connectors

Type | Name | Description
--- | --- | ---
Intra | intra[n_intra] | Connectors to exchange translational momentum and energy within the phase
Inter | inter[n_inter] | Connectors to exchange translational momentum and energy with all other species
Dalton | dalton | Connector for additivity of pressure
ThermalDiffusive | boundaries[n_trans, Side] | Connectors for transport
Material properties
replaceable package Data | Characteristic data

### Modelica definition

    model Fixed "Fixed properties"
      extends Solid(
        redeclare replaceable package Data = Characteristics.'SO3-'.Ionomer,
        redeclare parameter Q.Mobility mu=Modelica.Constants.small*U.C*U.s/U.g,
        redeclare parameter Q.TimeAbsolute nu=Data.nu(),
        redeclare parameter Q.ResistivityThermal theta=U.m*U.K/(0.16*U.W));

      // Note:  Mobility is small but not zero to prevent a singularity when SO3-
      // and C+ are both present (e.g., in the catalyst layers).

    end Fixed;