Modelica.Fluid.Fittings.BaseClasses

Information

Package Content

Name	Description
lossConstant_D_zeta	Return the loss constant 8*zeta/(pi^2*D^4)
QuadraticTurbulent	Pressure loss components that are mainly defined by a quadratic turbulent regime with constant loss factor data
PartialTeeJunction	Base class for a splitting/joining component with three ports
Bends	Pressure loss functions for bends
Orifices	Pressure loss functions for orifices
GenericResistances	Pressure loss functions for generic, geometry independent flow resistances

Modelica.Fluid.Fittings.BaseClasses.lossConstant_D_zeta

Information

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Default	Description
Diameter	D		Diameter at port_a or port_b [m]
Real	zeta		Constant pressure loss factor with respect to D (i.e., either port_a or port_b)

Outputs

Type	Name	Description
Real	k	Loss constant (= 8*zeta/(pi^2*D^4))

Modelica definition

function lossConstant_D_zeta 
  "Return the loss constant 8*zeta/(pi^2*D^4)"
      extends Modelica.Icons.Function;

  input SI.Diameter D "Diameter at port_a or port_b";
  input Real zeta 
    "Constant pressure loss factor with respect to D (i.e., either port_a or port_b)";
  output Real k "Loss constant (= 8*zeta/(pi^2*D^4))";

algorithm 
  k :=8*zeta/(Modelica.Constants.pi*Modelica.Constants.pi*D*D*D*D);
end lossConstant_D_zeta;

Modelica.Fluid.Fittings.BaseClasses.PartialTeeJunction

Connectors

Type	Name	Description
FluidPort_a	port_1
FluidPort_b	port_2
FluidPort_a	port_3

Modelica definition

partial model PartialTeeJunction 
  "Base class for a splitting/joining component with three ports"
  import Modelica.Fluid.Types;
  import Modelica.Fluid.Types.PortFlowDirection;

  replaceable package Medium=Modelica.Media.Interfaces.PartialMedium 
    "Medium in the component";

  Modelica.Fluid.Interfaces.FluidPort_a port_1(redeclare package Medium =
        Medium, m_flow(min=if (portFlowDirection_1 == PortFlowDirection.Entering) then 
                0.0 else -Modelica.Constants.inf, max=if (portFlowDirection_1
           == PortFlowDirection.Leaving) then 0.0 else Modelica.Constants.inf));
  Modelica.Fluid.Interfaces.FluidPort_b port_2(redeclare package Medium =
        Medium, m_flow(min=if (portFlowDirection_2 == PortFlowDirection.Entering) then 
                0.0 else -Modelica.Constants.inf, max=if (portFlowDirection_2
           == PortFlowDirection.Leaving) then 0.0 else Modelica.Constants.inf));
  Modelica.Fluid.Interfaces.FluidPort_a port_3(
    redeclare package Medium=Medium,
    m_flow(min=if (portFlowDirection_3==PortFlowDirection.Entering) then 0.0 else -Modelica.Constants.inf,
    max=if (portFlowDirection_3==PortFlowDirection.Leaving) then 0.0 else Modelica.Constants.inf));

protected 
  parameter PortFlowDirection portFlowDirection_1=PortFlowDirection.Bidirectional 
    "Flow direction for port_1";
  parameter PortFlowDirection portFlowDirection_2=PortFlowDirection.Bidirectional 
    "Flow direction for port_2";
  parameter PortFlowDirection portFlowDirection_3=PortFlowDirection.Bidirectional 
    "Flow direction for port_3";

end PartialTeeJunction;