Modelica.Fluid.Dissipation.PressureLoss.Channel

Package for pressure loss calculation of channels

Information

Channel

Internal overall flow

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).

Package Content

Name Description
Modelica.Fluid.Dissipation.PressureLoss.Channel.dp_internalFlowOverall_DP dp_internalFlowOverall_DP Pressure loss of internal flow | calculate pressure loss | overall flow regime | surface roughness | several geometries
Modelica.Fluid.Dissipation.PressureLoss.Channel.dp_internalFlowOverall_MFLOW dp_internalFlowOverall_MFLOW Pressure loss of internal flow | calculate mass flow rate | overall flow regime | surface roughness | several geometries
Modelica.Fluid.Dissipation.PressureLoss.Channel.dp_internalFlowOverall_IN_con dp_internalFlowOverall_IN_con Input record for function dp_internalFlowOverall_DP and dp_internalFlowOverall_MFLOW
Modelica.Fluid.Dissipation.PressureLoss.Channel.dp_internalFlowOverall_IN_var dp_internalFlowOverall_IN_var Input record for function dp_internalFlowOverall_DP and dp_internalFlowOverall_MFLOW

Modelica.Fluid.Dissipation.PressureLoss.Channel.dp_internalFlowOverall_DP Modelica.Fluid.Dissipation.PressureLoss.Channel.dp_internalFlowOverall_DP

Pressure loss of internal flow | calculate pressure loss | overall flow regime | surface roughness | several geometries

Information

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).

Inputs

NameDescription
Constant inputs
IN_conInput record for function dp_internalFlowOverall_DP
Variable inputs
IN_varInput record for function dp_internalFlowOverall_DP
Input
m_flowMass flow rate [kg/s]

Outputs

NameDescription
DPOutput for function dp_internalFlowOverall_DP [Pa]

Modelica.Fluid.Dissipation.PressureLoss.Channel.dp_internalFlowOverall_MFLOW Modelica.Fluid.Dissipation.PressureLoss.Channel.dp_internalFlowOverall_MFLOW

Pressure loss of internal flow | calculate mass flow rate | overall flow regime | surface roughness | several geometries

Information

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).

Inputs

NameDescription
Constant inputs
IN_conInput record for function dp_internalFlowOverall_MFLOW
Variable inputs
IN_varInput record for function dp_internalFlowOverall_MFLOW
Input
dpPressure loss [Pa]

Outputs

NameDescription
M_FLOWOutput of function dp_overall_MFLOW [kg/s]

Modelica.Fluid.Dissipation.PressureLoss.Channel.dp_internalFlowOverall_IN_con Modelica.Fluid.Dissipation.PressureLoss.Channel.dp_internalFlowOverall_IN_con

Input record for function dp_internalFlowOverall_DP and dp_internalFlowOverall_MFLOW

Information

This record is used as input record for the pressure loss function dp_internalFlowOverall_DP and dp_internalFlowOverall_MFLOW.

Extends from Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Geometry (Input for several geometries of internal flow).

Parameters

NameDescription
Channel
roughnessChoice of considering surface roughness
geometryChoice of geometry for internal flow
KRoughness (average height of surface asperities) [m]
LLength [m]
Annular cross sectional area
d_annSmall diameter [m]
D_annLarge diameter [m]
Circular cross sectional area
d_cirInternal diameter [m]
Elliptical cross sectional area
a_ellHalf length of long base line [m]
b_ellHalf length of short base line [m]
Rectangular cross sectional area
a_recHorizontal length [m]
b_recVertical length [m]
a_triLength of base line [m]
Triangle cross sectional area
h_triHeight to top angle perpendicular to base line [m]
betaTop angle [rad]

Modelica.Fluid.Dissipation.PressureLoss.Channel.dp_internalFlowOverall_IN_var Modelica.Fluid.Dissipation.PressureLoss.Channel.dp_internalFlowOverall_IN_var

Input record for function dp_internalFlowOverall_DP and dp_internalFlowOverall_MFLOW

Information

This record is used as input record for the pressure loss 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).

Parameters

NameDescription
Fluid properties
etaDynamic viscosity of fluid [Pa.s]
rhoDensity of fluid [kg/m3]
Automatically generated Thu Oct 1 16:07:59 2020.