Package Modelica.​Fluid.​Fittings.​BaseClasses.​Bends.​EdgedBend
Pressure loss functions for edged bends

Information

This package contains utility functions and records for the EdgedBend fitting component.

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

Package Contents

NameDescription
GeometryGeometric data for a curved bend
massFlowRateReturn mass flow rate m_flow as function of pressure loss dp for a curved bend
pressureLossReturn pressure loss dp as function of mass flow rate m_flow for a curved bend

Function Modelica.​Fluid.​Fittings.​BaseClasses.​Bends.​EdgedBend.​massFlowRate
Return mass flow rate m_flow as function of pressure loss dp for a curved bend

Information

This function returns the mass flow rate m_flow as function of pressure loss dp for an edged bend. The details of the function are described here.

The bend characteristic is valid for constant density and constant dynamic viscosity. It can be approximately also used for compressible media. This is performed by providing the upstream density and upstream dynamic viscosity. In order to be able to regularize density and dynamic viscosity around zero mass flow rate, the two quantities have to be given if fluid flows from port_a to port_b (d_a, eta_a) and if fluid flows from port_b to port_a (d_b, eta_b).

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

Inputs

TypeNameDescription
PressuredpPressure loss
GeometrygeometryGeometry of bend
Densityd_aDensity at port_a when fluid is flowing from port_a to port_b
Densityd_bDensity at port_b when fluid is flowing from port_b to port_a
DynamicViscosityeta_aDynamic viscosity at port_a when fluid is flowing from port_a to port_b
DynamicViscosityeta_bDynamic viscosity at port_b when fluid is flowing from port_b to port_a
AbsolutePressuredp_smallSmall pressure drop used for regularization if m_flow=f(...,dp_small,..,dp)
MassFlowRatem_flow_smallSmall mass flow rate used for regularization if dp=f_inv(...,m_flow_small,m_flow)

Outputs

TypeNameDescription
MassFlowRatem_flowMass flow rate (= port_a.m_flow)

Function Modelica.​Fluid.​Fittings.​BaseClasses.​Bends.​EdgedBend.​pressureLoss
Return pressure loss dp as function of mass flow rate m_flow for a curved bend

Information

This function returns the pressure loss dp as function of mass flow rate m_flow for an edged bend. The details of the function are described here.

The bend characteristic is valid for constant density and constant dynamic viscosity. It can be approximately also used for compressible media. This is performed by providing the upstream density and upstream dynamic viscosity. In order to be able to regularize density and dynamic viscosity around zero mass flow rate, the two quantities have to be given if fluid flows from port_a to port_b (d_a, eta_a) and if fluid flows from port_b to port_a (d_b, eta_b).

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

Inputs

TypeNameDescription
MassFlowRatem_flowMass flow rate (= port_a.m_flow)
GeometrygeometryGeometry of bend
Densityd_aDensity at port_a when fluid is flowing from port_a to port_b
Densityd_bDensity at port_b when fluid is flowing from port_b to port_a
DynamicViscosityeta_aDynamic viscosity at port_a when fluid is flowing from port_a to port_b
DynamicViscosityeta_bDynamic viscosity at port_b when fluid is flowing from port_b to port_a
AbsolutePressuredp_smallSmall pressure drop used for regularization if m_flow=f(...,dp_small,..,dp)
MassFlowRatem_flow_smallSmall mass flow rate used for regularization if dp=f_inv(...,m_flow_small,m_flow)

Outputs

TypeNameDescription
PressuredpPressure loss

Record Modelica.​Fluid.​Fittings.​BaseClasses.​Bends.​EdgedBend.​Geometry
Geometric data for a curved bend

Information

This record is used to define the geometric (constant) data of an edged bend. The details of the record are described here.

Extends from Modelica.​Icons.​Record (Icon for records).

Fields

TypeNameDescription
Diameterd_hydHydraulic diameter
AngledeltaAngle of turning
RoughnessKAbsolute roughness, with a default for a smooth steel pipe

Generated 2018-12-12 12:13:28 EST by MapleSim.