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Separator Vessel

Represents a separator vessel unit operation that splits an inlet multi-phase stream into separate vapour and liquid outlet streams. Supports two-phase and three-phase operation, optional heat duty, and dynamic simulation.

DWSIM.UnitOperations.UnitOperations.Vessel
Assembly DWSIM.UnitOperations.dll · Object ← BaseClass ← UnitOpBaseClass ← Vessel

At a glance

Separator Vessel in the example flowsheet

Port Index Connected in the example
Inlet, material 0 Chilled-gas
Inlet, material 1
Inlet, material 2
Inlet, material 3
Inlet, material 4
Inlet, material 5
Inlet, energy 6
Outlet, material 0 Sales-gas
Outlet, material 1 Condensate
Outlet, material 2
Outlet, material 3
Outlet, energy 4

Example

This code runs on every build of this site, and the output below is what it printed.

fs = (Flowsheet.Create("SeparatorExample")
      .WithCompounds("Methane", "Ethane", "Propane", "N-butane", "N-pentane")
      .WithPropertyPackage(PropertyPackages.PengRobinson))

feed = (fs.AddMaterialStream("Chilled-gas")
        .At(Q.Celsius(-20.0), Q.Bar(40.0))
        .SetCompoundMolarFlow("Methane", 70.0)      # mol/s
        .SetCompoundMolarFlow("Ethane", 12.0)
        .SetCompoundMolarFlow("Propane", 10.0)
        .SetCompoundMolarFlow("N-butane", 5.0)
        .SetCompoundMolarFlow("N-pentane", 3.0))
gas = fs.AddMaterialStream("Sales-gas")
liquid = fs.AddMaterialStream("Condensate")

vessel = (fs.AddSeparator("V-1")
          .ConnectFeed(feed, 0)
          .ConnectProduct(gas, 0)        # vapor outlet
          .ConnectProduct(liquid, 1))    # liquid outlet

fs.AutoLayout()
fs.Solve()

g, l = gas.Object, liquid.Object
print(f"Feed vapor fraction = {feed.Object.Phases[2].Properties.molarfraction:.4f}")
print(f"Gas flow            = {g.Phases[0].Properties.molarflow:.2f} mol/s")
print(f"Condensate flow     = {l.Phases[0].Properties.molarflow:.2f} mol/s")
print(f"Mass balance        = {feed.Object.GetMassFlow():.4f} kg/s in, "
      f"{g.GetMassFlow() + l.GetMassFlow():.4f} kg/s out")
print(f"Methane in gas      = {g.Phases[0].Compounds['Methane'].MoleFraction:.4f} (mole fraction)")
print(f"Propane+ in liquid  = {sum(l.Phases[0].Compounds[c].MoleFraction for c in ('Propane', 'N-butane', 'N-pentane')):.4f} (mole fraction)")

Output

Feed vapor fraction = 0.7269
Gas flow            = 72.69 mol/s
Condensate flow     = 27.31 mol/s
Mass balance        = 2.4318 kg/s in, 2.4318 kg/s out
Methane in gas      = 0.8569 (mole fraction)
Propane+ in liquid  = 0.5323 (mole fraction)

DWSIM 10.2.11.0, generated 2026-10-08.

Properties

IDs accepted by GetPropertyValue, SetPropertyValue, the sensitivity analysis, the optimizer, the Adjust block and dynamic events. Units are SI; pass another unit system to GetPropertyValue to get them converted.

ID Name Unit (SI) Input
PROP_SV_0 Separation Temperature (if overriden) K yes
PROP_SV_1 Separation Pressure (if overriden) Pa yes

Dynamic mode

Extra properties used when the flowsheet runs in dynamic mode.

Name Unit
Vessel Orientation
Operating Pressure Pa
Liquid Level m
Get Volume from Dimensions
Volume m3
Get Height from Dimensions
Height m
Minimum Pressure Pa
Initialize using Inlet Stream
Reset Content
Liquid Outlet Nozzle Elevation m
Gas Outlet Nozzle Elevation m
Gas Outlet Transition Height m
Gas Outlet Homogeneous
Gas Outlet Liquid Fraction
Liquid Outlet Transition Height m
Liquid Outlet Gas Fraction
Rigorous Energy Balance (UV)
Split Wall (Wetted/Dry)
Internal Heat Transfer Factor
Fire Case (API 521)
Fire Environment Factor
Fire Adequate Drainage
Fire Dry Wall Heat Flux
Vessel Bottom Elevation m
Wetted Area m2
Fire Heat Input kW
Wetted Wall Heat Transfer Coefficient W/[m2.K]
Dry Wall Heat Transfer Coefficient W/[m2.K]
Wetted Wall Temperature K
Dry Wall Temperature K
Minimum Fluid Temperature K
Minimum Wetted Wall Temperature K
Minimum Dry Wall Temperature K
Maximum Dry Wall Temperature K

Learn more

API members

Public members declared by this class. Inherited members are documented on the base classes.

Constructors

Vessel(): Initializes a new default instance of the Vessel class.

Initializes a new default instance of the Vessel class.

public Vessel()

Public Sub New()

Vessel(string, string): Initializes a new instance of the Vessel class with a name and description.

Initializes a new instance of the Vessel class with a name and description.

Parameter Type Description
name String The display name of the vessel.
description String A brief description of the vessel. 
public Vessel(string name, string description)

Public Sub New(name As String, description As String)

Properties

CalculateRigorousHeatBalance: Gets or sets whether a rigorous wall heat-balance is performed instead of the legacy adiabatic model.

Gets or sets whether a rigorous wall heat-balance is performed instead of the legacy adiabatic model.

public bool CalculateRigorousHeatBalance { get; set; }

Public Property CalculateRigorousHeatBalance As Boolean

CalculationMode: Gets or sets the active thermal calculation mode for the vessel.

Gets or sets the active thermal calculation mode for the vessel.

public Vessel.CalculationModes CalculationMode { get; set; }

Public Property CalculationMode As Vessel.CalculationModes

DeltaQ: Gets or sets the net heat duty (kW) added to or removed from the vessel content.

Gets or sets the net heat duty (kW) added to or removed from the vessel content. Positive values indicate heating.

public double? DeltaQ { get; set; }

Public Property DeltaQ As Double?

DimensionRatio: Gets or sets the length-to-diameter ratio used to size the vessel geometry.

Gets or sets the length-to-diameter ratio used to size the vessel geometry.

public double DimensionRatio { get; set; }

Public Property DimensionRatio As Double

EquipmentTypes: Gets the list of equipment sub-types available for this vessel (Vertical, Horizontal).

Gets the list of equipment sub-types available for this vessel (Vertical, Horizontal).

public override List<string> EquipmentTypes { get; }

Public Overrides ReadOnly Property EquipmentTypes As List(Of String)

FlashPressure: Gets or sets the fixed vessel pressure (Pa) used when OverrideP is True.

Gets or sets the fixed vessel pressure (Pa) used when OverrideP is True.

public double FlashPressure { get; set; }

Public Property FlashPressure As Double

FlashTemperature: Gets or sets the fixed vessel temperature (K) used when OverrideT is True.

Gets or sets the fixed vessel temperature (K) used when OverrideT is True.

public double FlashTemperature { get; set; }

Public Property FlashTemperature As Double

HasPropertiesForDynamicMode: Gets a value indicating whether this unit operation exposes dedicated properties for dynamic mode configuration.

Gets a value indicating whether this unit operation exposes dedicated properties for dynamic mode configuration.

public override bool HasPropertiesForDynamicMode { get; }

Public Overrides ReadOnly Property HasPropertiesForDynamicMode As Boolean

HeadType: Gets or sets the head geometry type for sizing calculations (e.g.

Gets or sets the head geometry type for sizing calculations (e.g. "Hemispherical", "Flat").

public string HeadType { get; set; }

Public Property HeadType As String

HeadTypes: Gets the list of vessel head geometry types available for sizing calculations.

Gets the list of vessel head geometry types available for sizing calculations.

public static List<string> HeadTypes { get; set; }

Public Shared Property HeadTypes As List(Of String)

HeatingCoolingAmount: Gets or sets the fixed heating or cooling duty (kW) applied to the vessel content when the calculation mode requires it.

Gets or sets the fixed heating or cooling duty (kW) applied to the vessel content when the calculation mode requires it.

public double? HeatingCoolingAmount { get; set; }

Public Property HeatingCoolingAmount As Double?

MaterialTypes: Gets the list of wall material names selectable for rigorous heat-balance calculations.

Gets the list of wall material names selectable for rigorous heat-balance calculations.

public static List<string> MaterialTypes { get; set; }

Public Shared Property MaterialTypes As List(Of String)

MobileCompatible: Gets a value indicating whether this unit operation is compatible with mobile interfaces.

Gets a value indicating whether this unit operation is compatible with mobile interfaces.

public override bool MobileCompatible { get; }

Public Overrides ReadOnly Property MobileCompatible As Boolean

ObjectClass: Gets or sets the simulation object class category for this vessel (Separators).

Gets or sets the simulation object class category for this vessel (Separators).

public override SimulationObjectClass ObjectClass { get; set; }

Public Overrides Property ObjectClass As SimulationObjectClass

OverrideP: Gets or sets whether the vessel pressure is fixed to FlashPressure instead of being determined...

Gets or sets whether the vessel pressure is fixed to FlashPressure instead of being determined from the inlet streams.

public bool OverrideP { get; set; }

Public Property OverrideP As Boolean

OverrideT: Gets or sets whether the vessel temperature is fixed to FlashTemperature instead of being...

Gets or sets whether the vessel temperature is fixed to FlashTemperature instead of being determined by the flash calculation.

public bool OverrideT { get; set; }

Public Property OverrideT As Boolean

PressureCalculation: Gets or sets the rule used to determine the vessel operating pressure from the inlet stream pressures.

Gets or sets the rule used to determine the vessel operating pressure from the inlet stream pressures.

public Vessel.PressureBehavior PressureCalculation { get; set; }

Public Property PressureCalculation As Vessel.PressureBehavior

ResidenceTime: Gets or sets the required liquid residence time (minutes) used in vessel sizing.

Gets or sets the required liquid residence time (minutes) used in vessel sizing.

public double ResidenceTime { get; set; }

Public Property ResidenceTime As Double

SupportsDynamicMode: Gets a value indicating whether this unit operation supports dynamic simulation mode.

Gets a value indicating whether this unit operation supports dynamic simulation mode.

public override bool SupportsDynamicMode { get; }

Public Overrides ReadOnly Property SupportsDynamicMode As Boolean

SurgeFactor: Gets or sets the surge factor applied to the minimum vapour velocity when sizing the vessel.

Gets or sets the surge factor applied to the minimum vapour velocity when sizing the vessel.

public double SurgeFactor { get; set; }

Public Property SurgeFactor As Double

ThermalProperties: Gets or sets the thermal property definitions used for the rigorous heat-balance model.

Gets or sets the thermal property definitions used for the rigorous heat-balance model.

public ThermalEditorDefinitions ThermalProperties { get; set; }

Public Property ThermalProperties As ThermalEditorDefinitions

WallMaterial: Gets or sets the vessel wall material name.

Gets or sets the vessel wall material name. Used to look up thermal conductivity in rigorous mode.

public string WallMaterial { get; set; }

Public Property WallMaterial As String

WallTemperature: Gets or sets the ambient/external wall temperature (K) for rigorous heat-balance calculations.

Gets or sets the ambient/external wall temperature (K) for rigorous heat-balance calculations.

public double WallTemperature { get; set; }

Public Property WallTemperature As Double

WallTemperatureDry: Wall temperature of the dry (vapour-contact) segment, K.

Wall temperature of the dry (vapour-contact) segment, K. See WallTemperatureWetted.

public double WallTemperatureDry { get; set; }

Public Property WallTemperatureDry As Double

WallTemperatureWetted: Wall temperature of the wetted (liquid-contact) segment, K.

Wall temperature of the wetted (liquid-contact) segment, K. A persistent dynamic state used when the wall is split; the lumped WallTemperature is the area-weighted mean of the two segments.

public double WallTemperatureWetted { get; set; }

Public Property WallTemperatureWetted As Double

WallThickness: Gets or sets the vessel wall thickness in metres.

Gets or sets the vessel wall thickness in metres. Used in rigorous heat-balance and sizing calculations.

public double WallThickness { get; set; }

Public Property WallThickness As Double

Methods

CalcOverallExternalHeatTransferCoefficient(double, double, double, double, double, bool): Calculates the heat transfer coefficient between the wall and the surrounding air, combining the wall conduction...

Calculates the heat transfer coefficient between the wall and the surrounding air, combining the wall conduction resistance, the optional insulation layer (from ThermalProperties) and forced convection to air at 101325 Pa at the velocity set in ThermalProperties (Holman correlation).

Parameter Type Description
Dint Double Internal diameter, in m.
Dext Double External diameter, in m.
rugosidade Double Wall roughness, in m. Not used.
T Double Temperature used to evaluate the wall thermal conductivity, in K.
Text Double Ambient air temperature, in K.
isolamento Boolean True to include the insulation layer. 
public double[] CalcOverallExternalHeatTransferCoefficient(double Dint, double Dext, double rugosidade, double T, double Text, bool isolamento)

Public Function CalcOverallExternalHeatTransferCoefficient(Dint As Double, Dext As Double, rugosidade As Double, T As Double, Text As Double, isolamento As Boolean) As Double()

CalcOverallInternalHeatTransferCoefficient(double, double, double, double, double, double, double, double, double, double, double, double, double, double, double, double, double): Calculates the heat transfer coefficient between the vessel contents and the wall, combining the internal film...

Calculates the heat transfer coefficient between the vessel contents and the wall, combining the internal film coefficient (Petukhov correlation with holdup-weighted mixture properties) and the conduction resistance of the wall.

Parameter Type Description
EL Double Liquid holdup (volume fraction of liquid), used to weight the phase properties.
L Double Vessel length, in m. Not used.
Dint Double Internal diameter, in m.
Dext Double External diameter, in m.
rugosidade Double Wall roughness, in m. Not used; the roughness of WallMaterial is used instead.
T Double Temperature used to evaluate the wall thermal conductivity, in K.
Text Double External temperature, in K. Not used.
vel_g Double Vapor velocity, in m/s.
vel_l Double Liquid velocity, in m/s.
Cpl Double Liquid heat capacity, in kJ/(kg.K).
Cpv Double Vapor heat capacity, in kJ/(kg.K).
kl Double Liquid thermal conductivity, in W/(m.K).
kv Double Vapor thermal conductivity, in W/(m.K).
mu_l Double Liquid viscosity, in Pa.s.
mu_v Double Vapor viscosity, in Pa.s.
rho_l Double Liquid density, in kg/m3.
rho_v Double Vapor density, in kg/m3. 
public double[] CalcOverallInternalHeatTransferCoefficient(double EL, double L, double Dint, double Dext, double rugosidade, double T, double Text, double vel_g, double vel_l, double Cpl, double Cpv, double kl, double kv, double mu_l, double mu_v, double rho_l, double rho_v)

Public Function CalcOverallInternalHeatTransferCoefficient(EL As Double, L As Double, Dint As Double, Dext As Double, rugosidade As Double, T As Double, Text As Double, vel_g As Double, vel_l As Double, Cpl As Double, Cpv As Double, kl As Double, kv As Double, mu_l As Double, mu_v As Double, rho_l As Double, rho_v As Double) As Double()

Calculate(object): Calculates the gas-liquid separation vessel (flash drum).

Calculates the gas-liquid separation vessel (flash drum).

Parameter Type Description
args Object 
public override void Calculate(object args = null)

Public Overrides Sub Calculate(args As Object = Nothing)

CalculateVolume(): Computes the internal volume of the vessel (m3) based on either the user-entered value or the configured geometry...

Computes the internal volume of the vessel (m3) based on either the user-entered value or the configured geometry (diameter, length, and head type) from the dimensions list.

public double CalculateVolume()

Public Function CalculateVolume() As Double

CloneXML(): Creates a deep copy of this vessel via XML serialization.

Creates a deep copy of this vessel via XML serialization.

public override object CloneXML()

Public Overrides Function CloneXML() As Object

CloseEditForm(): Closes and disposes the editing form.

Closes and disposes the editing form.

public override void CloseEditForm()

Public Overrides Sub CloseEditForm()

CreateDimensionsList(): Creates the dimensions list (Diameter, Length) used for vessel sizing calculations.

Creates the dimensions list (Diameter, Length) used for vessel sizing calculations.

public override void CreateDimensionsList()

Public Overrides Sub CreateDimensionsList()

CreateDynamicProperties(): Registers the dynamic properties that are exposed in dynamic simulation mode, such as vessel orientation, operating...

Registers the dynamic properties that are exposed in dynamic simulation mode, such as vessel orientation, operating pressure, liquid level, volume, and height.

public override void CreateDynamicProperties()

Public Overrides Sub CreateDynamicProperties()

DeCalculate(): Clears all calculated results.

Clears all calculated results.

public override void DeCalculate()

Public Overrides Sub DeCalculate()

DisplayDynamicsEditForm(): Opens or activates the dynamics property editor form for this vessel, including buttons to view the accumulation...

Opens or activates the dynamics property editor form for this vessel, including buttons to view the accumulation stream and to fill the vessel from an inlet stream.

public override void DisplayDynamicsEditForm()

Public Overrides Sub DisplayDynamicsEditForm()

DisplayEditForm(): Opens or activates the editing form.

Opens or activates the editing form.

public override void DisplayEditForm()

Public Overrides Sub DisplayEditForm()

FireHeatInput(double, double, bool): API 521 pool-fire heat to the wetted surface, W: Q = C F A^0.82 with C = 43200 (adequate drainage and prompt...

API 521 pool-fire heat to the wetted surface, W: Q = C F A^0.82 with C = 43200 (adequate drainage and prompt firefighting) or 70900, F the environment factor, A the wetted area within 7.6 m of grade.

Parameter Type Description
wettedAreaWithin76m Double
environmentFactor Double
adequateDrainage Boolean 
public static double FireHeatInput(double wettedAreaWithin76m, double environmentFactor, bool adequateDrainage)

Public Shared Function FireHeatInput(wettedAreaWithin76m As Double, environmentFactor As Double, adequateDrainage As Boolean) As Double

GasOutletLiquidFraction(double, double, double): Mass fraction of liquid in the gas outlet: 0 with the level below the nozzle minus the transition band, 1 with the...

Mass fraction of liquid in the gas outlet: 0 with the level below the nozzle minus the transition band, 1 with the level at or above the nozzle, linear in between. Always 1 when the vessel holds no gas and always 0 when it holds no liquid.

Parameter Type Description
level Double
nozzleElevation Double
transitionHeight Double 
public double GasOutletLiquidFraction(double level, double nozzleElevation, double transitionHeight)

Public Function GasOutletLiquidFraction(level As Double, nozzleElevation As Double, transitionHeight As Double) As Double

GetDisplayDescription(): Returns the localised display description.

Returns the localised display description.

public override string GetDisplayDescription()

Public Overrides Function GetDisplayDescription() As String

GetDisplayName(): Returns the localised display name.

Returns the localised display name.

public override string GetDisplayName()

Public Overrides Function GetDisplayName() As String

GetDynamicResidenceTime(): Calculates the theoretical residence time (s) of fluid in the vessel by dividing the vessel volume by the total...

Calculates the theoretical residence time (s) of fluid in the vessel by dividing the vessel volume by the total volumetric inlet flow rate. Returns Double if the calculation cannot be performed.

public override double GetDynamicResidenceTime()

Public Overrides Function GetDynamicResidenceTime() As Double

GetDynamicVolume(): Returns the dynamic simulation volume of the vessel by delegating to CalculateVolume.

Returns the dynamic simulation volume of the vessel by delegating to CalculateVolume.

public override double GetDynamicVolume()

Public Overrides Function GetDynamicVolume() As Double

GetIconBitmapBytes(): Returns the icon bitmap as a byte array.

Returns the icon bitmap as a byte array.

public override byte[] GetIconBitmapBytes()

Public Overrides Function GetIconBitmapBytes() As Byte()

GetProperties(PropertyType): Returns an array of property identifiers for the specified property type.

Returns an array of property identifiers for the specified property type.

Parameter Type Description
proptype PropertyType 
public override string[] GetProperties(PropertyType proptype)

Public Overrides Function GetProperties(proptype As PropertyType) As String()

GetPropertyDescription(string): Returns a human-readable description of the specified property.

Returns a human-readable description of the specified property.

Parameter Type Description
p String 
public override string GetPropertyDescription(string p)

Public Overrides Function GetPropertyDescription(p As String) As String

GetPropertyUnit(string, IUnitsOfMeasure): Returns the unit string for the specified property.

Returns the unit string for the specified property.

Parameter Type Description
prop String
su IUnitsOfMeasure 
public override string GetPropertyUnit(string prop, IUnitsOfMeasure su = null)

Public Overrides Function GetPropertyUnit(prop As String, su As IUnitsOfMeasure = Nothing) As String

GetPropertyValue(string, IUnitsOfMeasure): Returns the value of the specified property.

Returns the value of the specified property.

Parameter Type Description
prop String
su IUnitsOfMeasure 
public override object GetPropertyValue(string prop, IUnitsOfMeasure su = null)

Public Overrides Function GetPropertyValue(prop As String, su As IUnitsOfMeasure = Nothing) As Object

GetReport(IUnitsOfMeasure, CultureInfo, string): Generates a plain-text report of the vessel results.

Generates a plain-text report of the vessel results.

Parameter Type Description
su IUnitsOfMeasure
ci CultureInfo
numberformat String 
public override string GetReport(IUnitsOfMeasure su, CultureInfo ci, string numberformat)

Public Overrides Function GetReport(su As IUnitsOfMeasure, ci As CultureInfo, numberformat As String) As String

GetRugosity(string): Returns the pipe-wall rugosity (m) for the given material name.

Returns the pipe-wall rugosity (m) for the given material name.

Parameter Type Description
material String 
public double GetRugosity(string material)

Public Function GetRugosity(material As String) As Double

HeadArea(double): Outside area of one head, m2, for the selected head type (2:1 ellipsoidal by default).

Outside area of one head, m2, for the selected head type (2:1 ellipsoidal by default).

Parameter Type Description
DE Double 
public double HeadArea(double DE)

Public Function HeadArea(DE As Double) As Double

Kwall(double): Returns the thermal conductivity of the wall material (WallMaterial) at the given temperature.

Returns the thermal conductivity of the wall material (WallMaterial) at the given temperature.

Parameter Type Description
T Double Wall temperature, in K. 
public double Kwall(double T)

Public Function Kwall(T As Double) As Double

LiquidHeightFromFraction(double, double, double): Liquid height (m) that holds the given liquid volume fraction: f L for a vertical vessel; for a horizontal one the...

Liquid height (m) that holds the given liquid volume fraction: f L for a vertical vessel; for a horizontal one the chord height whose circular segment is the fraction f of the section.

Parameter Type Description
f Double
D Double
L Double 
public double LiquidHeightFromFraction(double f, double D, double L)

Public Function LiquidHeightFromFraction(f As Double, D As Double, L As Double) As Double

LiquidOutletGasFraction(double, double, double): Mass fraction of gas in the liquid outlet: 0 with the level above the nozzle plus the transition band, 1 with the...

Mass fraction of gas in the liquid outlet: 0 with the level above the nozzle plus the transition band, 1 with the level at or below the nozzle, linear in between. Always 1 when the vessel holds no liquid and always 0 when it holds no gas.

Parameter Type Description
level Double
nozzleElevation Double
transitionHeight Double 
public double LiquidOutletGasFraction(double level, double nozzleElevation, double transitionHeight)

Public Function LiquidOutletGasFraction(level As Double, nozzleElevation As Double, transitionHeight As Double) As Double

NaturalConvectionHTC(double, double, double, double, double, double, double, double): Heat transfer coefficient for turbulent natural convection on a wall, from Nu = 0.13 (Gr Pr)^(1/3), in which the...

Heat transfer coefficient for turbulent natural convection on a wall, from Nu = 0.13 (Gr Pr)^(1/3), in which the length scale cancels. The result is never lower than floor.

Parameter Type Description
k Double Fluid thermal conductivity, in W/(m.K).
rho Double Fluid density, in kg/m3.
mu Double Fluid dynamic viscosity, in Pa.s.
cpKJ Double Fluid heat capacity, in kJ/(kg.K).
dT Double Wall-to-fluid temperature difference, in K (the sign is ignored).
T Double Fluid temperature, in K. Not used in the current correlation.
beta Double Fluid thermal expansion coefficient, in 1/K (1/T for an ideal gas).
floor Double Minimum value returned, in W/(m2.K); also returned when the properties are invalid. 
public static double NaturalConvectionHTC(double k, double rho, double mu, double cpKJ, double dT, double T, double beta, double floor)

Public Shared Function NaturalConvectionHTC(k As Double, rho As Double, mu As Double, cpKJ As Double, dT As Double, T As Double, beta As Double, floor As Double) As Double

RunDynamicModel(): Executes one dynamic simulation step for the vessel: integrates inlet and outlet mass flows over the current time...

Executes one dynamic simulation step for the vessel: integrates inlet and outlet mass flows over the current time step, updates the accumulation stream, and flashes the vessel content to determine the outlet stream conditions.

public override void RunDynamicModel()

Public Overrides Sub RunDynamicModel()

SetPropertyValue(string, object, IUnitsOfMeasure): Sets the value of the specified property.

Sets the value of the specified property.

Parameter Type Description
prop String
propval Object
su IUnitsOfMeasure 
public override bool SetPropertyValue(string prop, object propval, IUnitsOfMeasure su = null)

Public Overrides Function SetPropertyValue(prop As String, propval As Object, su As IUnitsOfMeasure = Nothing) As Boolean

SizeHorizontal(): Sizes the vessel in horizontal orientation using the calculated flow rates and settling velocity.

Sizes the vessel in horizontal orientation using the calculated flow rates and settling velocity.

public void SizeHorizontal()

Public Sub SizeHorizontal()

SizeVertical(): Sizes the vessel in vertical orientation using the calculated flow rates and settling velocity.

Sizes the vessel in vertical orientation using the calculated flow rates and settling velocity.

public void SizeVertical()

Public Sub SizeVertical()

TotalWallArea(double, double): Total outside wall area (shell plus both heads), m2.

Total outside wall area (shell plus both heads), m2.

Parameter Type Description
DE Double
L Double 
public double TotalWallArea(double DE, double L)

Public Function TotalWallArea(DE As Double, L As Double) As Double

UpdateDimensionsList(): Updates the Diameter and Length dimension values from the last sizing calculation results.

Updates the Diameter and Length dimension values from the last sizing calculation results.

public override void UpdateDimensionsList()

Public Overrides Sub UpdateDimensionsList()

UpdateEditForm(): Refreshes the editing form with updated data.

Refreshes the editing form with updated data.

public override void UpdateEditForm()

Public Overrides Sub UpdateEditForm()

WallDensity(): Returns the density of the wall material (WallMaterial).

Returns the density of the wall material (WallMaterial).

public double WallDensity()

Public Function WallDensity() As Double

WallSpecificHeat(): Returns the specific heat of the wall material (WallMaterial).

Returns the specific heat of the wall material (WallMaterial).

public double WallSpecificHeat()

Public Function WallSpecificHeat() As Double

WallThermalMass(double, double, double): Returns the heat capacity of the cylindrical vessel wall (mass times specific heat), used by the transient wall model.

Returns the heat capacity of the cylindrical vessel wall (mass times specific heat), used by the transient wall model.

Parameter Type Description
D Double Internal diameter, in m.
DE Double External diameter, in m.
L Double Vessel length, in m. 
public double WallThermalMass(double D, double DE, double L)

Public Function WallThermalMass(D As Double, DE As Double, L As Double) As Double

WettedArea(double, double, double, double): Outside wall area (shell plus both heads) in contact with liquid up to height h, m2.

Outside wall area (shell plus both heads) in contact with liquid up to height h, m2.

Parameter Type Description
h Double
D Double
DE Double
L Double 
public double WettedArea(double h, double D, double DE, double L)

Public Function WettedArea(h As Double, D As Double, DE As Double, L As Double) As Double

Fields

AH: Results of the horizontal vessel sizing (SizeHorizontal): AH is the vessel length and DH the...

Results of the horizontal vessel sizing (SizeHorizontal): AH is the vessel length and DH the vessel diameter, both in m.

public double AH

Public AH As Double

AV: Results of the vertical vessel sizing (SizeVertical): AV is the vessel height and DV the vessel...

Results of the vertical vessel sizing (SizeVertical): AV is the vessel height and DV the vessel diameter, both in m.

public double AV

Public AV As Double

DH: Results of the horizontal vessel sizing (SizeHorizontal): AH is the vessel length and DH the...

Results of the horizontal vessel sizing (SizeHorizontal): AH is the vessel length and DH the vessel diameter, both in m.

public double DH

Public DH As Double

DV: Results of the vertical vessel sizing (SizeVertical): AV is the vessel height and DV the vessel...

Results of the vertical vessel sizing (SizeVertical): AV is the vessel height and DV the vessel diameter, both in m.

public double DV

Public DV As Double

f: The classic (WinForms) editor window open for this vessel, if any.

The classic (WinForms) editor window open for this vessel, if any. Not saved with the flowsheet.

public object f

Public f As Object

MixedStream: Internal material stream holding the mixture of all connected inlet streams, rebuilt on each steady-state...

Internal material stream holding the mixture of all connected inlet streams, rebuilt on each steady-state calculation before the flash. Not saved with the flowsheet.

public MaterialStream MixedStream

Public MixedStream As MaterialStream