Modelica.Fluid.Dissipation.Utilities.Records.General

Information

Package Content

Name	Description
PressureLoss	Base record for fluid properties for pressure loss
FluidProperties	Base record for fluid properties
IdealGas_con	Base record for generic pressure loss function | ideal gas | mean density
IdealGas_var	Base record for generic pressure loss function | ideal gas | mean density
NominalDensityViscosity	Base record for generic pressure loss function
NominalPressureLossLawDensity_con	Base record for generic pressure loss function
NominalPressureLossLawDensity_var	Base record for generic pressure loss function
QuadraticVFLOW	Base record for generic pressure loss function | quadratic function (dp=a*Vdot^2 + b*Vdot)
TwoPhaseFlow_con	Base record for two phase Flow
TwoPhaseFlow_var	Base record for two phase flow
IdealGas	Base record for generic pressure loss function | ideal gas | mean density
NominalPressureLossLawDensity	Base record for generic pressure loss function
TwoPhaseFlow	base record for two phase Flow

Modelica.Fluid.Dissipation.Utilities.Records.General.PressureLoss

Information

Parameters

Type	Name	Default	Description
Fluid properties
DynamicViscosity	eta		Dynamic viscosity of fluid [Pa.s]
Density	rho		Density of fluid [kg/m3]

Modelica definition

record PressureLoss 
  "Base record for fluid properties for pressure loss"
  extends Modelica.Icons.Record;

  SI.DynamicViscosity eta "Dynamic viscosity of fluid";
  SI.Density rho "Density of fluid";
end PressureLoss;

Modelica.Fluid.Dissipation.Utilities.Records.General.FluidProperties

Information

Parameters

Type	Name	Default	Description
Fluid properties
SpecificHeatCapacityAtConstantPressure	cp		Specific heat capacity of fluid at constant pressure [J/(kg.K)]
DynamicViscosity	eta		Dynamic viscosity of fluid [Pa.s]
ThermalConductivity	lambda		Thermal conductivity of fluid [W/(m.K)]
Density	rho		Density of fluid [kg/m3]

Modelica definition

record FluidProperties "Base record for fluid properties"
  extends Modelica.Icons.Record;

  SI.SpecificHeatCapacityAtConstantPressure cp 
    "Specific heat capacity of fluid at constant pressure";

  SI.DynamicViscosity eta "Dynamic viscosity of fluid";

  SI.ThermalConductivity lambda "Thermal conductivity of fluid";

  SI.Density rho "Density of fluid";
end FluidProperties;

Modelica.Fluid.Dissipation.Utilities.Records.General.IdealGas_con

Information

Parameters

Type	Name	Default	Description
Generic variables
Real	exp	2	Exponent of pressure loss law
Real	Km	6824.86	Coefficient for pressure loss law [(Pa)^2/{(kg/s)^exp*K}]
Fluid properties
SpecificHeatCapacity	R_s		Specific gas constant of ideal gas [J/(kg.K)]

Modelica definition

record IdealGas_con 
  "Base record for generic pressure loss function | ideal gas | mean density"
  extends Modelica.Icons.Record;

  Real exp=2 "Exponent of pressure loss law";
  SI.SpecificHeatCapacity R_s "Specific gas constant of ideal gas";
  Real Km=6824.86 "Coefficient for pressure loss law [(Pa)^2/{(kg/s)^exp*K}]";

end IdealGas_con;

Modelica.Fluid.Dissipation.Utilities.Records.General.IdealGas_var

Information

Parameters

Type	Name	Default	Description
Fluid properties
Density	rho_m		Mean density of ideal gas [kg/m3]
Temp_K	T_m		Mean temperature of ideal gas [K]
Pressure	p_m		Mean pressure of ideal gas [Pa]

Modelica definition

record IdealGas_var 
  "Base record for generic pressure loss function | ideal gas | mean density"
  extends Modelica.Icons.Record;

  SI.Density rho_m "Mean density of ideal gas";
  SI.Temp_K T_m "Mean temperature of ideal gas";
  SI.Pressure p_m "Mean pressure of ideal gas";

end IdealGas_var;

Modelica.Fluid.Dissipation.Utilities.Records.General.NominalDensityViscosity

Information

Parameters

Type	Name	Default	Description
Generic variables
Pressure	dp_nom	2	Nominal pressure loss (at nominal values of mass flow rate and density) [Pa]
Real	exp	2	Exponent of pressure loss law
MassFlowRate	m_flow_nom	1	Nominal mass flow rate (at nominal values of pressure loss and density) [kg/s]
Density	rho_nom		Nominal density (at nominal values of mass flow rate and pressure loss) [kg/m3]
Real	exp_eta	1	Exponent for dynamic viscosity dependence
DynamicViscosity	eta_nom		Dynamic viscosity at nominal pressure loss [Pa.s]

Modelica definition

record NominalDensityViscosity 
  "Base record for generic pressure loss function"

  extends Modelica.Icons.Record;

  SI.Pressure dp_nom=2 
    "Nominal pressure loss (at nominal values of mass flow rate and density)";
  Real exp=2 "Exponent of pressure loss law";
  SI.MassFlowRate m_flow_nom=1 
    "Nominal mass flow rate (at nominal values of pressure loss and density)";
  SI.Density rho_nom 
    "Nominal density (at nominal values of mass flow rate and pressure loss)";
  Real exp_eta=1 "Exponent for dynamic viscosity dependence";
  SI.DynamicViscosity eta_nom "Dynamic viscosity at nominal pressure loss";

end NominalDensityViscosity;

Modelica.Fluid.Dissipation.Utilities.Records.General.NominalPressureLossLawDensity_con

Information

Parameters

Type	Name	Default	Description
Generic variables
MassOrVolumeFlowRate	target	Dissipation.Utilities.Types....	1 == use nominal mass flow rate | 2 == use nominal volume flow rate
Area	A_cross	A_cross_nom	Cross sectional area [m2]
Area	A_cross_nom	Modelica.Constants.pi*0.1^2/4	Nominal cross sectional area [m2]
Pressure	dp_nom	2	Nominal pressure loss (at nominal values of mass flow rate and density) [Pa]
MassFlowRate	m_flow_nom	1	Nominal mass flow rate (at nominal values of pressure loss and density) [kg/s]
Real	exp	2	Exponent of pressure loss law
VolumeFlowRate	V_flow_nom	m_flow_nom/rho_nom	Nominal volume flow rate (at nominal values of pressure loss and density) [m3/s]
Density	rho_nom		Nominal density (at nominal values of mass flow rate and pressure loss) [kg/m3]
PressureLossCoefficient	zeta_TOT_nom	0.02*1/0.1	Nominal pressure loss coefficient (for nominal values) [1]

Modelica definition

record NominalPressureLossLawDensity_con 
  "Base record for generic pressure loss function"

  extends Modelica.Icons.Record;

  //NominalMassFlowRate
  Modelica.Fluid.Dissipation.Utilities.Types.MassOrVolumeFlowRate
    target =                                                             Dissipation.Utilities.Types.MassOrVolumeFlowRate.MassFlowRate 
    "1 == use nominal mass flow rate | 2 == use nominal volume flow rate";

  SI.Area A_cross=A_cross_nom "Cross sectional area";
  SI.Area A_cross_nom=Modelica.Constants.pi*0.1^2/4 
    "Nominal cross sectional area";

  SI.Pressure dp_nom=2 
    "Nominal pressure loss (at nominal values of mass flow rate and density)";
  SI.MassFlowRate m_flow_nom=1 
    "Nominal mass flow rate (at nominal values of pressure loss and density)";
  Real exp=2 "Exponent of pressure loss law";

  SI.VolumeFlowRate V_flow_nom=m_flow_nom/rho_nom 
    "Nominal volume flow rate (at nominal values of pressure loss and density)";
  SI.Density rho_nom 
    "Nominal density (at nominal values of mass flow rate and pressure loss)";

  Types.PressureLossCoefficient zeta_TOT_nom=0.02*1/0.1 
    "Nominal pressure loss coefficient (for nominal values)";

end NominalPressureLossLawDensity_con;

Modelica.Fluid.Dissipation.Utilities.Records.General.NominalPressureLossLawDensity_var

Information

Parameters

Type	Name	Default	Description
Generic variables
PressureLossCoefficient	zeta_TOT	0.2	Pressure loss coefficient [1]

Modelica definition

record NominalPressureLossLawDensity_var 
  "Base record for generic pressure loss function"

  extends Modelica.Icons.Record;

  TYP.PressureLossCoefficient zeta_TOT=0.2 "Pressure loss coefficient";

end NominalPressureLossLawDensity_var;

Modelica.Fluid.Dissipation.Utilities.Records.General.QuadraticVFLOW

Information

Parameters

Type	Name	Default	Description
Generic variables
Real	a	15	Coefficient for quadratic term [(Pa.s2)/m6]
Real	b	0	Coefficient for linear term [(Pa.s)/m3]

Modelica definition

record QuadraticVFLOW 
  "Base record for generic pressure loss function | quadratic function (dp=a*Vdot^2 + b*Vdot)"

  extends Modelica.Icons.Record;

  Real a(unit="(Pa.s2)/m6") = 15 "Coefficient for quadratic term";
  Real b(unit="(Pa.s)/m3") = 0 "Coefficient for linear term";

end QuadraticVFLOW;

Modelica.Fluid.Dissipation.Utilities.Records.General.TwoPhaseFlow_con

Information

Parameters

Type	Name	Default	Description
Geometry
Area	A_cross	PI*0.1^2/4	Cross sectional area [m2]
Length	perimeter	PI*0.1	Wettet perimeter [m]
Length	length	1	Length in fluid flow direction [m]

Modelica definition

record TwoPhaseFlow_con "Base record for two phase Flow"
  extends Modelica.Icons.Record;

  SI.Area A_cross=PI*0.1^2/4 "Cross sectional area";
  SI.Length perimeter=PI*0.1 "Wettet perimeter";
  SI.Length length=1 "Length in fluid flow direction";

end TwoPhaseFlow_con;

Modelica.Fluid.Dissipation.Utilities.Records.General.TwoPhaseFlow_var

Information

Parameters

Type	Name	Default	Description
Fluid properties
Density	rho_g		Density of gas [kg/m3]
Density	rho_l		Density of liquid [kg/m3]
DynamicViscosity	eta_g		Dynamic viscosity of gas [Pa.s]
DynamicViscosity	eta_l		Dynamic viscosity of liquid [Pa.s]
SurfaceTension	sigma		Surface tension [N/m]
Input
Real	x_flow	0	Mean mass flow rate quality over length

Modelica definition

record TwoPhaseFlow_var "Base record for two phase flow"
  extends Modelica.Icons.Record;

  SI.Density rho_g "Density of gas";
  SI.Density rho_l "Density of liquid";
  SI.DynamicViscosity eta_g "Dynamic viscosity of gas";
  SI.DynamicViscosity eta_l "Dynamic viscosity of liquid";
  SI.SurfaceTension sigma "Surface tension";

  //input variables
  Real x_flow=0 "Mean mass flow rate quality over length";
end TwoPhaseFlow_var;

Modelica.Fluid.Dissipation.Utilities.Records.General.IdealGas

Information

Parameters

Type	Name	Default	Description
Generic variables
Real	exp	2	Exponent of pressure loss law
Real	Km	R_s*(2e3)/((10)^exp/rho_m)	Coefficient for pressure loss law [(Pa)^2/{(kg/s)^exp*K}]
Fluid properties
SpecificHeatCapacity	R_s		Specific gas constant of ideal gas [J/(kg.K)]
Density	rho_m	p_m/(R_s*T_m)	Mean density of ideal gas [kg/m3]
Temp_K	T_m		Mean temperature of ideal gas [K]
Pressure	p_m		Mean pressure of ideal gas [Pa]

Modelica definition

record IdealGas 
  "Base record for generic pressure loss function | ideal gas | mean density"
  extends Modelica.Icons.Record;

  parameter Real exp(min=Modelica.Constants.eps) = 2 
    "Exponent of pressure loss law";
  parameter SI.SpecificHeatCapacity R_s(min=1) 
    "Specific gas constant of ideal gas";

  Real Km(min=Modelica.Constants.eps) = R_s*(2e3)/((10)^exp/rho_m) 
    "Coefficient for pressure loss law [(Pa)^2/{(kg/s)^exp*K}]";
  SI.Density rho_m=p_m/(R_s*T_m) "Mean density of ideal gas";
  SI.Temp_K T_m "Mean temperature of ideal gas";
  SI.Pressure p_m "Mean pressure of ideal gas";

end IdealGas;

Modelica.Fluid.Dissipation.Utilities.Records.General.NominalPressureLossLawDensity

Information

Parameters

Type	Name	Default	Description
Generic variables
MassOrVolumeFlowRate	target	Dissipation.Utilities.Types....	1 == use nominal mass flow rate | 2 == use nominal volume flow rate
Area	A_cross	A_cross_nom	Cross sectional area [m2]
Area	A_cross_nom	Modelica.Constants.pi*0.1^2/4	Nominal cross sectional area [m2]
Pressure	dp_nom	2	Nominal pressure loss (at nominal values of mass flow rate and density) [Pa]
MassFlowRate	m_flow_nom	1	Nominal mass flow rate (at nominal values of pressure loss and density) [kg/s]
Real	exp	2	Exponent of pressure loss law
VolumeFlowRate	V_flow_nom	m_flow_nom/rho_nom	Nominal volume flow rate (at nominal values of pressure loss and density) [m3/s]
Density	rho_nom		Nominal density (at nominal values of mass flow rate and pressure loss) [kg/m3]
PressureLossCoefficient	zeta_TOT	zeta_TOT_nom	Pressure loss coefficient [1]
PressureLossCoefficient	zeta_TOT_nom	0.02*1/0.1	Nominal pressure loss coefficient (for nominal values) [1]

Modelica definition

record NominalPressureLossLawDensity 
  "Base record for generic pressure loss function"

  extends Modelica.Icons.Record;

  //NominalMassFlowRate
  Modelica.Fluid.Dissipation.Utilities.Types.MassOrVolumeFlowRate
    target =                                                             Dissipation.Utilities.Types.MassOrVolumeFlowRate.MassFlowRate 
    "1 == use nominal mass flow rate | 2 == use nominal volume flow rate";

  parameter SI.Area A_cross=A_cross_nom "Cross sectional area";
  parameter SI.Area A_cross_nom=Modelica.Constants.pi*0.1^2/4 
    "Nominal cross sectional area";

  parameter SI.Pressure dp_nom(min=Modelica.Constants.eps) = 2 
    "Nominal pressure loss (at nominal values of mass flow rate and density)";
  parameter SI.MassFlowRate m_flow_nom(min=Modelica.Constants.eps) = 1 
    "Nominal mass flow rate (at nominal values of pressure loss and density)";
  parameter Real exp(min=Modelica.Constants.eps) = 2 
    "Exponent of pressure loss law";

  SI.VolumeFlowRate V_flow_nom(min=Modelica.Constants.eps) = m_flow_nom/rho_nom 
    "Nominal volume flow rate (at nominal values of pressure loss and density)";
  SI.Density rho_nom(min=Modelica.Constants.eps) 
    "Nominal density (at nominal values of mass flow rate and pressure loss)";

  Types.PressureLossCoefficient zeta_TOT=zeta_TOT_nom 
    "Pressure loss coefficient";
  parameter Types.PressureLossCoefficient zeta_TOT_nom=0.02*1/0.1 
    "Nominal pressure loss coefficient (for nominal values)";

end NominalPressureLossLawDensity;

Modelica.Fluid.Dissipation.Utilities.Records.General.TwoPhaseFlow

Information

Parameters

Type	Name	Default	Description
Fluid properties
Density	rho_l		Density of liquid [kg/m3]
Density	rho_g		Density of gas [kg/m3]
DynamicViscosity	eta_l		Dynamic viscosity of liquid [Pa.s]
DynamicViscosity	eta_g		Dynamic viscosity of gas [Pa.s]
MassFraction	x	0.5	Vapour fraction [1]
SurfaceTension	sigma		Surface Tension [N/m]
others
Real	n	0.25	Exponent in Blasius equation (0.2-0.25)

Modelica definition

record TwoPhaseFlow "base record for two phase Flow"
  extends Modelica.Icons.Record;

  SI.Density rho_l "Density of liquid";
  SI.Density rho_g "Density of gas";
  SI.DynamicViscosity eta_l "Dynamic viscosity of liquid";
  SI.DynamicViscosity eta_g "Dynamic viscosity of gas";
  SI.MassFraction x=0.5 "Vapour fraction";
  SI.SurfaceTension sigma "Surface Tension";
  Real n=0.25 "Exponent in Blasius equation (0.2-0.25)";
end TwoPhaseFlow;