7.38. Pressurization Model

This section is referenced in the following other sections

Simulation Setup: Pressurization Zones

7.38.1. Pressurization Model

Scope: Aria Region
Summary: Parameters for the pressurization model

begin Pressurization Model ModelName

   Coupling Algorithm {=} {coupled | segregated}

   Equation Of State {=} equationOfState...

   Excess Volume {=} excessVolume

   Excess Volume Temperature {=} excessVolumeTemperature

   Excess Volume Weight {=} excessVolumeWeight

   Initial Mixture Molecular Weight {=} initMMW

   Initial Pressure {=} initPressure

   Pressure Unit {=} pressureUnit

   Pressurization Source Blocks {=} sourceBlocks...

   Pressurized Blocks {=} pressurizedBlocks...

   Pressurized Bulk Nodes {=} pressurizedBulkNodes...

   Solver Name {=} solverName

   Temperature Averaging {=} ventingModel

   Venting Model {=} ventingModel

   Venting Model Property propertyName {=} propertyModelAndParams...

end Pressurization Model ModelName

7.38.1.1. Line Commands

Coupling Algorithm

Syntax: Coupling Algorithm {=} {coupled | segregated}
Summary: This command specifies the coupling algorithm (COUPLED or SEGREGATED).

Parameter	Value	Default
{=}	{= \| are \| is}	–
couplingAlg	{coupled \| segregated}	COUPLED

Equation Of State

Syntax: Equation Of State {=} equationOfState…
Summary: Specifies the equation of state to use (Ideal_Gas, VanDerWaal, or BKWS). The gas constant is an optional argument (R = value), and defaults to 8314 J/kmol-K if omitted.

Parameter	Value	Default
{=}	{= \| are \| is}	–
equationOfState	string…	–

Excess Volume

Syntax: Excess Volume {=} excessVolume
Summary: Specifies the volume of the excess volume. This volume is assumed to be at the average zone temperature unless you also specify an excess volume temperature.

Parameter	Value	Default
{=}	{= \| are \| is}	–
excessVolume	“string”	–

Excess Volume Temperature

Syntax: Excess Volume Temperature {=} excessVolumeTemperature
Summary: Specifies the temperature of the excess volume. If omitted, the excess volume is treated as the same temperature as the main averaged temperature. If provided, you must also provide a weighting factor to use for RHO and RHO_CP temperature averaging schemes.

Parameter	Value	Default
{=}	{= \| are \| is}	–
excessVolumeTemperature	real	Copied

Excess Volume Weight

Syntax: Excess Volume Weight {=} excessVolumeWeight
Summary: Specifies the weighting factor to use for the excess volume. For RHO averaging, this will be the density. For rhoCp averaging, this will be rho times Cp. For volume and ideal gas averaging this should not be provided.

Parameter	Value	Default
{=}	{= \| are \| is}	–
excessVolumeWeight	real	1

Initial Mixture Molecular Weight

Syntax: Initial Mixture Molecular Weight {=} initMMW
Summary: Specifies the mixture molecular weight of the initial gas present in the pressurization zone
Description: Default is 28.97 g/mol for dry air. This should be specified in the appropriate units for the simulation. If no boundary conditions (e.g. venting or coupling to a gas transport region of the model) are applied to the pressurization zone then the value does not affect the results of the simulation.

Parameter	Value	Default
{=}	{= \| are \| is}	–
initMMW	real	28.97

Initial Pressure

Syntax: Initial Pressure {=} initPressure
Summary: Specifies the initial pressure in the specified pressure units.

Parameter	Value	Default
{=}	{= \| are \| is}	–
initPressure	real	-1.0

Pressure Unit

Syntax: Pressure Unit {=} pressureUnit
Summary: This command specifies the units of pressure that is returned. Options are PA, ATM, and PSI (Default is Pa)

Parameter	Value	Default
{=}	{= \| are \| is}	–
pressureUnit	string	Pa

Pressurization Source Blocks

Syntax: Pressurization Source Blocks {=} sourceBlocks…
Summary: A list of ChemEq blocks that provide the gas source(s) for this pressurization model.

Parameter	Value	Default
{=}	{= \| are \| is}	–
sourceBlocks	string…	–

Pressurized Blocks

Syntax: Pressurized Blocks {=} pressurizedBlocks…
Summary: A list of blocks that the pressurization occurs in.

Parameter	Value	Default
{=}	{= \| are \| is}	–
pressurizedBlocks	string…	–

Pressurized Bulk Nodes

Syntax: Pressurized Bulk Nodes {=} pressurizedBulkNodes…
Summary: A list of bulk nodes that the pressurization occurs in.

Parameter	Value	Default
{=}	{= \| are \| is}	–
pressurizedBulkNodes	string…	–

Solver Name

Syntax: Solver Name {=} solverName
Summary: This command specifies the name of the ODE solver block to use for pressurization.

Parameter	Value	Default
{=}	{= \| are \| is}	–
solverName	string	NONE

Temperature Averaging

Syntax: Temperature Averaging {=} ventingModel
Summary: This command specifies the temperature averaging model to use (VOLUME, IDEAL_GAS, RHO, or RHOCP)

Parameter	Value	Default
{=}	{= \| are \| is}	–
ventingModel	string	IDEAL_GAS

Venting Model

Syntax: Venting Model {=} ventingModel
Summary: This command specifies the venting model to use (OPEN, CLOSED, or VENTED)

Parameter	Value	Default
{=}	{= \| are \| is}	–
ventingModel	string	–

Venting Model Property

Syntax: Venting Model Property propertyName {=} propertyModelAndParams…
Summary: Define a material property associated with the venting model. Required if the venting model is VENTED. At a minimum a model for the VENTING_VOLUMETRIC_FLOW_RATE must be provided, and depending on the choice of that model additional properties may be required.

Parameter	Value	Default
propertyName	string	–
{=}	{= \| are \| is}	–
propertyModelAndParams	string…	–