FCSys.Species.H2O.Ionomer

H₂O in ionomer

Information

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

Package Content

Name	Description
Fixed	Fixed properties

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FCSys.Species.H2O.Ionomer.Fixed

Fixed properties

Information

Assumptions:

1. The generalized resistivities (η, θ) are fixed (e.g., independent of thermodynamic state).

For more information, please see the Species model.

Extends from Fluid (Base model for a fluid species).

Parameters

Type	Name	Default	Description
Integer	n_inter	0	Number of exchange connections with other phases
Material properties
replaceable package Data		Characteristics.H2O.Ionomer	Characteristic data
DiffusivityMassSpecific	zeta	Data.zeta(T, v)	** [L2.M/(N.T)]
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]
Current	I.start[n_trans]	0	Current [N/T]
Velocity	phi_boundaries.start[n_trans, Side]	0	Normal velocities at the boundaries [L/T]
Force	f.start[n_trans]	0	Total normal translational force on pairs of boundaries [L.M/T2]
Force	minusDeltaf.start[n_trans]	0	Dynamic and nonequilibrium compression forces [L.M/T2]
Geometry
Length	kL[:]	L[cartTrans]	Effective transport length [L]
Initialization
Init	initMaterial	Init.none	Method of initializing the material state
Init	initEnergy	Init.temperature	Method of initializing the thermal state
NumberAbsolute	lambda_IC	14*environment.RH	Initial ratio of H2O molecules to SO3- end-groups [1]
Assumptions
Integer	n_trans	1	Number of transport axes
Integer	n_chem	1	Number of reaction and phase change processes
Formulation of the conservation equations
Boolean	consRot	false	Conserve rotational momentum
ConsTrans	consTransX	ConsTrans.dynamic	X-axis translational momentum
ConsTrans	consTransY	ConsTrans.dynamic	Y-axis translational momentum
ConsTrans	consTransZ	ConsTrans.dynamic	Z-axis translational momentum
ConsThermo	consEnergy	ConsThermo.dynamic	Energy
Axes with upstream discretization
Boolean	upstreamX	true	X
Boolean	upstreamY	true	Y
Boolean	upstreamZ	true	Z
Flow conditions
Boolean	approxVelocity	true	Calculate normal boundary velocities assuming uniform density
NumberAbsolute	Nu_Phi[Axis]	{4,4,4}	Translational Nusselt numbers [1]
NumberAbsolute	Nu_Q	1	Thermal Nusselt number [1]
Advanced
Amount	N0	0	Nominal amount of material to prevent depletion [N]

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
Boundary	boundaries[n_trans, Side]	Connectors for transport
Chemical	chemical[n_chem]	Connector for reactions and phase change
Material properties
replaceable package Data		Characteristic data

Modelica definition

model Fixed "Fixed properties"

  extends Fluid(
    redeclare replaceable package Data = Characteristics.H2O.Ionomer,
    redeclare parameter Q.Mobility mu=Data.mu(),
    redeclare parameter Q.TimeAbsolute nu=Data.nu(),
    redeclare parameter Q.Fluidity eta=Data.eta(),
    redeclare parameter Q.ResistivityThermal theta=Data.theta(),
    final N_IC,
    final h_IC,
    final g_IC,
    final rho_IC,
    final p_IC,
    final V_IC,
    final T_IC,
    final consMaterial,
    final tauprime,
    n_chem=1,
    final initMaterial=Init.none);

  parameter Q.NumberAbsolute lambda_IC=14*environment.RH 
    "Initial ratio of H2O molecules to SO3- end-groups";

  Q.NumberAbsolute lambda(start=lambda_IC, fixed=true) 
    "Ratio of H2O molecules to SO3- end-groups";

equation 
  lambda*v = Characteristics.'SO3-'.Ionomer.b_v[1, 1];

end Fixed;