Package Modelica.​Fluid.​Dissipation.​PressureLoss.​Bend
Package for pressure loss calculation of bends

Information

Bend

Curved bend overall flow

Calculation of pressure loss in curved bends at overall flow regime for incompressible and single-phase fluid flow through circular cross sectional area considering surface roughness. See more information.

Edged bend overall flow

Calculation of pressure loss in edged bends with sharp corners at overall flow regime for incompressible and single-phase fluid flow through circular cross sectional area considering surface roughness. See more information .

Extends from Modelica.​Icons.​VariantsPackage (Icon for package containing variants).

Package Contents

NameDescription
dp_curvedOverall_DPPressure loss of curved bend | calculate pressure loss | overall flow regime | surface roughness
dp_curvedOverall_IN_conInput record for function dp_curvedOverall_DP and dp_curvedOverall_MFLOW
dp_curvedOverall_IN_varInput record for function dp_curvedOverall_DP and dp_curvedOverall_MFLOW
dp_curvedOverall_MFLOWPressure loss of curved bend | calculate mass flow rate | overall flow regime | surface roughness
dp_edgedOverall_DPPressure loss of edged bend | calculate pressure loss | overall flow regime | surface roughness
dp_edgedOverall_IN_conInput record for function dp_edgedOverall_DP and dp_edgedOverall_MFLOW
dp_edgedOverall_IN_varInput record for function dp_edgedOverall_DP and dp_edgedOverall_MFLOW
dp_edgedOverall_MFLOWPressure loss of edged bend | calculate mass flow rate | overall flow regime | surface roughness

Function Modelica.​Fluid.​Dissipation.​PressureLoss.​Bend.​dp_curvedOverall_DP
Pressure loss of curved bend | calculate pressure loss | overall flow regime | surface roughness

Information

Calculation of pressure loss in curved bends at overall flow regime for incompressible and single-phase fluid flow through circular cross sectional area considering surface roughness.

Generally this function is numerically best used for the incompressible case , where the mass flow rate (m_flow) is known (as state variable) in the used model and the corresponding pressure loss (DP) has to be calculated. On the other hand the function dp_curvedOverall_MFLOW is numerically best used for the compressible case if the pressure loss (dp) is known (out of pressures as state variable) and the mass flow rate (M_FLOW) has to be calculated. See more information.

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

Inputs

TypeNameDescription
dp_curvedOverall_IN_conIN_conInput record for function dp_curvedOverall_DP
dp_curvedOverall_IN_varIN_varInput record for function dp_curvedOverall_DP
MassFlowRatem_flowMass flow rate

Outputs

TypeNameDescription
PressureDPOutput for function dp_curvedOverall_DP

Function Modelica.​Fluid.​Dissipation.​PressureLoss.​Bend.​dp_curvedOverall_MFLOW
Pressure loss of curved bend | calculate mass flow rate | overall flow regime | surface roughness

Information

Calculation of pressure loss in curved bends at overall flow regime for incompressible and single-phase fluid flow through circular cross sectional area considering surface roughness.

Generally this function is numerically best used for the compressible case if the pressure loss (dp) is known (out of pressures as state variable) and the mass flow rate (M_FLOW) has to be calculated. On the other hand the function dp_curvedOverall_DP is numerically best used for the incompressible case , where the mass flow rate (m_flow) is known (as state variable) in the used model and the corresponding pressure loss (DP) has to be calculated. See more information .

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

Inputs

TypeNameDescription
dp_curvedOverall_IN_conIN_conInput record for function dp_curvedOverall_MFLOW
dp_curvedOverall_IN_varIN_varInput record for function dp_curvedOverall_MFLOW
PressuredpPressure loss

Outputs

TypeNameDescription
MassFlowRateM_FLOWOutput for function dp_curvedOverall_MFLOW

Record Modelica.​Fluid.​Dissipation.​PressureLoss.​Bend.​dp_curvedOverall_IN_con
Input record for function dp_curvedOverall_DP and dp_curvedOverall_MFLOW

Information

This record is used as input record for the pressure loss function dp_curvedOverall_DP and dp_curvedOverall_MFLOW .

Extends from Modelica.​Fluid.​Dissipation.​Utilities.​Records.​PressureLoss.​Bend (Input for bend).

Fields

TypeNameDescription
Diameterd_hydHydraulic diameter
AngledeltaAngle of turning
LengthKRoughness (absolute average height of surface asperities)
RadiusR_0Curvature radius

Record Modelica.​Fluid.​Dissipation.​PressureLoss.​Bend.​dp_curvedOverall_IN_var
Input record for function dp_curvedOverall_DP and dp_curvedOverall_MFLOW

Information

This record is used as input record for the pressure loss function dp_curvedOverall_DP and dp_curvedOverall_MFLOW .

Extends from Modelica.​Fluid.​Dissipation.​Utilities.​Records.​General.​PressureLoss (Base record for fluid properties for pressure loss).

Fields

TypeNameDescription
DynamicViscosityetaDynamic viscosity of fluid
DensityrhoDensity of fluid

Function Modelica.​Fluid.​Dissipation.​PressureLoss.​Bend.​dp_edgedOverall_DP
Pressure loss of edged bend | calculate pressure loss | overall flow regime | surface roughness

Information

Calculation of pressure loss in edged bends with sharp corners at overall flow regime for incompressible and single-phase fluid flow through circular cross sectional area considering surface roughness.

There are larger pressure losses in an edged bend compared to a curved bend under the same conditions. The effect of a sharp corner in an edged bend on the pressure loss is much larger than the influence of surface roughness.

Generally this function is numerically best used for the incompressible case, where the mass flow rate (m_flow) is known (as state variable) in the used model and the corresponding pressure loss (DP) has to be calculated. On the other hand the function dp_edgedOverall_MFLOW is numerically best used for the compressible case if the pressure loss (dp) is known (out of pressures as state variable) and the mass flow rate (M_FLOW) has to be calculated. See more information .

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

Inputs

TypeNameDescription
dp_edgedOverall_IN_conIN_conInput record for function dp_edgedOverall_DP
dp_edgedOverall_IN_varIN_varInput record for function dp_edgedOverall_DP
MassFlowRatem_flowMass flow rate

Outputs

TypeNameDescription
PressureDPOutput for function dp_edgedOverall_DP

Function Modelica.​Fluid.​Dissipation.​PressureLoss.​Bend.​dp_edgedOverall_MFLOW
Pressure loss of edged bend | calculate mass flow rate | overall flow regime | surface roughness

Information

Calculation of pressure loss in edged bends with sharp corners at overall flow regime for incompressible and single-phase fluid flow through circular cross sectional area considering surface roughness.

There are larger pressure losses in an edged bend compared to a curved bend under the same conditions. The effect of a sharp corner in an edged bend on the pressure loss is much larger than the influence of surface roughness.

Generally this function is numerically best used for the compressible case if the pressure loss (dp) is known (out of pressures as state variable) and the mass flow rate (M_FLOW) has to be calculated. On the other hand the function dp_edgedOverall_DP is numerically best used for the incompressible case , where the mass flow rate (m_flow) is known (as state variable) in the used model and the corresponding pressure loss (DP) has to be calculated. See more information .

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

Inputs

TypeNameDescription
dp_edgedOverall_IN_conIN_conInput record for function dp_edgedOverall_MFLOW
dp_edgedOverall_IN_varIN_varInput record for function dp_edgedOverall_MFLOW
PressuredpPressure loss

Outputs

TypeNameDescription
MassFlowRateM_FLOWOutput for function dp_edgedOverall_MFLOW

Record Modelica.​Fluid.​Dissipation.​PressureLoss.​Bend.​dp_edgedOverall_IN_con
Input record for function dp_edgedOverall_DP and dp_edgedOverall_MFLOW

Information

This record is used as input record for the pressure loss function dp_edgedOverall_DP and dp_edgedOverall_MFLOW .

Extends from Modelica.​Fluid.​Dissipation.​Utilities.​Records.​PressureLoss.​EdgedBend (Input for bend).

Fields

TypeNameDescription
Diameterd_hydHydraulic diameter
AngledeltaAngle of turning
LengthKRoughness (absolute average height of surface asperities)

Record Modelica.​Fluid.​Dissipation.​PressureLoss.​Bend.​dp_edgedOverall_IN_var
Input record for function dp_edgedOverall_DP and dp_edgedOverall_MFLOW

Information

This record is used as input record for the pressure loss function dp_edgedOverall_DP and dp_edgedOverall_MFLOW .

Extends from Modelica.​Fluid.​Dissipation.​Utilities.​Records.​General.​PressureLoss (Base record for fluid properties for pressure loss).

Fields

TypeNameDescription
DynamicViscosityetaDynamic viscosity of fluid
DensityrhoDensity of fluid

Generated 2018-12-12 12:13:30 EST by MapleSim.