Package for pressure loss calculation of channels
Calculation of pressure loss for an internal flow through different geometries at laminar and turbulent flow regime considering surface roughness. See more information.
Extends from Modelica.Icons.VariantsPackage (Icon for package containing variants).
Name | Description |
---|---|
dp_internalFlowOverall_DP | Pressure loss of internal flow | calculate pressure loss | overall flow regime | surface roughness | several geometries |
dp_internalFlowOverall_MFLOW | Pressure loss of internal flow | calculate mass flow rate | overall flow regime | surface roughness | several geometries |
dp_internalFlowOverall_IN_con | Input record for function dp_internalFlowOverall_DP and dp_internalFlowOverall_MFLOW |
dp_internalFlowOverall_IN_var | Input record for function dp_internalFlowOverall_DP and dp_internalFlowOverall_MFLOW |
Pressure loss of internal flow | calculate pressure loss | overall flow regime | surface roughness | several geometries
Calculation of pressure loss for an internal flow through different geometries at overall flow regime for incompressible and single-phase fluid flow 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_internalFlowOverall_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_internalFlowOverall_DP |
Variable inputs | |
IN_var | Input record for function dp_internalFlowOverall_DP |
Input | |
m_flow | Mass flow rate [kg/s] |
Name | Description |
---|---|
DP | Output for function dp_internalFlowOverall_DP [Pa] |
Pressure loss of internal flow | calculate mass flow rate | overall flow regime | surface roughness | several geometries
Calculation of pressure loss for an internal flow through different geometries at overall flow regime for incompressible and single-phase fluid flow 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_internalFlowOverall_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.
The pressure loss calculation for internal fluid flow in different geometries is further documented here.
Extends from Modelica.Icons.Function (Icon for functions).
Name | Description |
---|---|
Constant inputs | |
IN_con | Input record for function dp_internalFlowOverall_MFLOW |
Variable inputs | |
IN_var | Input record for function dp_internalFlowOverall_MFLOW |
Input | |
dp | Pressure loss [Pa] |
Name | Description |
---|---|
M_FLOW | Output of function dp_overall_MFLOW [kg/s] |
Input record for function dp_internalFlowOverall_DP and dp_internalFlowOverall_MFLOW
Extends from Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Geometry (Input for several geometries of internal flow).
Name | Description |
---|---|
Channel | |
roughness | Choice of considering surface roughness |
geometry | Choice of geometry for internal flow |
K | Roughness (average height of surface asperities) [m] |
L | Length [m] |
Annular cross sectional area | |
d_ann | Small diameter [m] |
D_ann | Large diameter [m] |
Circular cross sectional area | |
d_cir | Internal diameter [m] |
Elliptical cross sectional area | |
a_ell | Half length of long base line [m] |
b_ell | Half length of short base line [m] |
Rectangular cross sectional area | |
a_rec | Horizontal length [m] |
b_rec | Vertical length [m] |
a_tri | Length of base line [m] |
Triangle cross sectional area | |
h_tri | Height to top angle perpendicular to base line [m] |
beta | Top angle [rad] |
Input record for function dp_internalFlowOverall_DP and dp_internalFlowOverall_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] |