dp_curvedOverall_DP
dp_curvedOverall_MFLOW
dp_curvedOverall_IN_con
dp_curvedOverall_IN_var
dp_edgedOverall_DP
dp_edgedOverall_MFLOW
dp_edgedOverall_IN_con
dp_edgedOverall_IN_var
Package for pressure loss calculation of bends
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_MFLOW
|
Pressure loss of curved bend | calculate mass flow rate | 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_edgedOverall_DP
|
Pressure loss of edged bend | calculate pressure loss | overall flow regime | surface roughness |
| dp_edgedOverall_MFLOW
|
Pressure loss of edged bend | calculate mass flow rate | 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 |
Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_curvedOverall_DPPressure loss of curved bend | calculate pressure loss | overall flow regime | surface roughness
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).
| Name | Description |
|---|---|
| Constant inputs | |
| IN_con | Input record for function dp_curvedOverall_DP |
| Variable inputs | |
| IN_var | Input record for function dp_curvedOverall_DP |
| Input | |
| m_flow | Mass flow rate [kg/s] |
| Name | Description |
|---|---|
| DP | Output for function dp_curvedOverall_DP [Pa] |
Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_curvedOverall_MFLOWPressure loss of curved bend | calculate mass flow rate | overall flow regime | surface roughness
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).
| Name | Description |
|---|---|
| Constant inputs | |
| IN_con | Input record for function dp_curvedOverall_MFLOW |
| Variable inputs | |
| IN_var | Input record for function dp_curvedOverall_MFLOW |
| Input | |
| dp | Pressure loss [Pa] |
| Name | Description |
|---|---|
| M_FLOW | Output for function dp_curvedOverall_MFLOW [kg/s] |
Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_curvedOverall_IN_conInput record for function dp_curvedOverall_DP and dp_curvedOverall_MFLOW
Extends from Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Bend (Input for bend).
| Name | Description |
|---|---|
| Bend | |
| d_hyd | Hydraulic diameter [m] |
| delta | Angle of turning [rad] |
| K | Roughness (absolute average height of surface asperities) [m] |
| R_0 | Curvature radius [m] |
Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_curvedOverall_IN_varInput record for 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).
| Name | Description |
|---|---|
| Fluid properties | |
| eta | Dynamic viscosity of fluid [Pa.s] |
| rho | Density of fluid [kg/m3] |
Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_edgedOverall_DPPressure loss of edged bend | calculate pressure loss | overall flow regime | surface roughness
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).
| Name | Description |
|---|---|
| Constant inputs | |
| IN_con | Input record for function dp_edgedOverall_DP |
| Variable inputs | |
| IN_var | Input record for function dp_edgedOverall_DP |
| Input | |
| m_flow | Mass flow rate [kg/s] |
| Name | Description |
|---|---|
| DP | Output for function dp_edgedOverall_DP [Pa] |
Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_edgedOverall_MFLOWPressure loss of edged bend | calculate mass flow rate | overall flow regime | surface roughness
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).
| Name | Description |
|---|---|
| Constant inputs | |
| IN_con | Input record for function dp_edgedOverall_MFLOW |
| Variable inputs | |
| IN_var | Input record for function dp_edgedOverall_MFLOW |
| Input | |
| dp | Pressure loss [Pa] |
| Name | Description |
|---|---|
| M_FLOW | Output for function dp_edgedOverall_MFLOW [kg/s] |
Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_edgedOverall_IN_conInput record for function dp_edgedOverall_DP and dp_edgedOverall_MFLOW
Extends from Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.EdgedBend (Input for bend).
| Name | Description |
|---|---|
| Bend | |
| d_hyd | Hydraulic diameter [m] |
| delta | Angle of turning [rad] |
| K | Roughness (absolute average height of surface asperities) [m] |
Modelica.Fluid.Dissipation.PressureLoss.Bend.dp_edgedOverall_IN_varInput record for 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).
| Name | Description |
|---|---|
| Fluid properties | |
| eta | Dynamic viscosity of fluid [Pa.s] |
| rho | Density of fluid [kg/m3] |