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;