Package Modelica.Fluid.Dissipation.PressureLoss.BendPackage for pressure loss calculation of bends
Package Modelica.Fluid.Dissipation.PressureLoss.Bend
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.
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).
| Name | Description |
|---|---|
dp_curvedOverall_DP | Pressure loss of curved bend | calculate pressure loss | overall flow regime | surface roughness |
dp_curvedOverall_IN_con | Input record for function dp_curvedOverall_DP and dp_curvedOverall_MFLOW |
dp_curvedOverall_IN_var | Input record for function dp_curvedOverall_DP and dp_curvedOverall_MFLOW |
dp_curvedOverall_MFLOW | Pressure loss of curved bend | calculate mass flow rate | overall flow regime | surface roughness |
dp_edgedOverall_DP | Pressure loss of edged bend | calculate pressure loss | overall flow regime | surface roughness |
dp_edgedOverall_IN_con | Input record for function dp_edgedOverall_DP and dp_edgedOverall_MFLOW |
dp_edgedOverall_IN_var | Input record for function dp_edgedOverall_DP and dp_edgedOverall_MFLOW |
dp_edgedOverall_MFLOW | Pressure loss of edged bend | calculate mass flow rate | overall flow regime | surface roughness |
Function Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_curvedOverall_DP
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).
| Type | Name | Description |
|---|---|---|
dp_curvedOverall_IN_con | IN_con | Input record for function dp_curvedOverall_DP |
dp_curvedOverall_IN_var | IN_var | Input record for function dp_curvedOverall_DP |
MassFlowRate | m_flow | Mass flow rate |
| Type | Name | Description |
|---|---|---|
Pressure | DP | Output for function dp_curvedOverall_DP |
Function Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_curvedOverall_MFLOW
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).
| Type | Name | Description |
|---|---|---|
dp_curvedOverall_IN_con | IN_con | Input record for function dp_curvedOverall_MFLOW |
dp_curvedOverall_IN_var | IN_var | Input record for function dp_curvedOverall_MFLOW |
Pressure | dp | Pressure loss |
| Type | Name | Description |
|---|---|---|
MassFlowRate | M_FLOW | Output for function dp_curvedOverall_MFLOW |
Record Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_curvedOverall_IN_conThis 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).
| Type | Name | Description |
|---|---|---|
Diameter | d_hyd | Hydraulic diameter |
Angle | delta | Angle of turning |
Length | K | Roughness (absolute average height of surface asperities) |
Radius | R_0 | Curvature radius |
Record Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_curvedOverall_IN_varThis 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).
| Type | Name | Description |
|---|---|---|
DynamicViscosity | eta | Dynamic viscosity of fluid |
Density | rho | Density of fluid |
Function Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_edgedOverall_DP
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).
| Type | Name | Description |
|---|---|---|
dp_edgedOverall_IN_con | IN_con | Input record for function dp_edgedOverall_DP |
dp_edgedOverall_IN_var | IN_var | Input record for function dp_edgedOverall_DP |
MassFlowRate | m_flow | Mass flow rate |
| Type | Name | Description |
|---|---|---|
Pressure | DP | Output for function dp_edgedOverall_DP |
Function Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_edgedOverall_MFLOW
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).
| Type | Name | Description |
|---|---|---|
dp_edgedOverall_IN_con | IN_con | Input record for function dp_edgedOverall_MFLOW |
dp_edgedOverall_IN_var | IN_var | Input record for function dp_edgedOverall_MFLOW |
Pressure | dp | Pressure loss |
| Type | Name | Description |
|---|---|---|
MassFlowRate | M_FLOW | Output for function dp_edgedOverall_MFLOW |
Record Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_edgedOverall_IN_conThis 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).
| Type | Name | Description |
|---|---|---|
Diameter | d_hyd | Hydraulic diameter |
Angle | delta | Angle of turning |
Length | K | Roughness (absolute average height of surface asperities) |
Record Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_edgedOverall_IN_varThis 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).
| Type | Name | Description |
|---|---|---|
DynamicViscosity | eta | Dynamic viscosity of fluid |
Density | rho | Density of fluid |