Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss

Information

Extends from Modelica.Icons.RecordsPackage (Icon for package containing records).

Package Content

Name Description
Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Bend Bend Input for bend
Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Geometry Geometry Input for several geometries of internal flow
Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Orifice Orifice Input for orifice
Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.PressureLossInput PressureLossInput Input for pressure loss calculation
Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.StraightPipe StraightPipe Input for straight pipe
Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Tjunction Tjunction Input for T-junction
Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Diffuser Diffuser Input for diffuser
Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.EdgedBend EdgedBend Input for bend
Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.SuddenChange SuddenChange Input for sudden change of diameter

Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Bend Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Bend

Input for bend

Information

Extends from EdgedBend (Input for bend).

Parameters

NameDescription
Bend
d_hydHydraulic diameter [m]
deltaAngle of turning [rad]
KRoughness (absolute average height of surface asperities) [m]
R_0Curvature radius [m]

Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Geometry Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Geometry

Input for several geometries of internal flow

Information

Extends from Modelica.Icons.Record (Icon for records).

Parameters

NameDescription
Channel
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.Utilities.Records.PressureLoss.Orifice Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Orifice

Input for orifice

Information

Extends from Modelica.Icons.Record (Icon for records).

Parameters

NameDescription
Orifice
A_0Cross sectional area of vena contraction [m2]
C_0Perimeter of vena contraction [m]
A_1Large cross sectional area of orifice [m2]
C_1Large perimeter of orifice [m]
LLength of vena contraction [m]

Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.PressureLossInput Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.PressureLossInput

Input for pressure loss calculation

Information

Extends from Modelica.Icons.Record (Icon for records).

Parameters

NameDescription
Input
targetTarget variable of calculation
dpPressure loss [Pa]
m_flowMass flow rate [kg/s]

Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.StraightPipe Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.StraightPipe

Input for straight pipe

Information

Extends from Modelica.Icons.Record (Icon for records).

Parameters

NameDescription
Straight pipe
d_hydHydraulic diameter [m]
LLength [m]

Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Tjunction Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Tjunction

Input for T-junction

Information

Extends from Modelica.Icons.Record (Icon for records).

Parameters

NameDescription
T-junction
united_converging_cross_section= true, if A_cross_total = 2*A_cross_branch, otherwise A_cross_total > 2*A_cross_branch
velocity_reference_branches= true, if pressure loss coefficients w.r.t. velocity in each passage, otherwise w.r.t. velocity in total passage
alphaAngle of branching
d_hyd[3]Hydraulic diameter of passages [side,straight,total] [m]
Restrictions
m_flow_minRestriction for smoothing at reverse fluid flow [kg/s]
v_maxRestriction for maximum fluid flow velocity [m/s]
zeta_TOT_maxRestriction for maximum value of pressure loss coefficient

Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Diffuser Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.Diffuser

Input for diffuser

Information

Extends from Modelica.Icons.Record (Icon for records).

Parameters

NameDescription
Diffuser
alphaDiffuser diverging angle [rad]
A_1Small constant cross sectional area before diffuser section [m2]
A_2Large constant cross sectional area after diffuser section [m2]
C_1Small perimeter before diffuser section [m]
C_2Large perimeter after diffuser section [m]
L_1Length of straight pipe before diffuser section [m]
L_2Length of straight pipe after diffuser section [m]
L_dLength of diffuser section (parallel to bulk fluid flow) [m]
Numerical aspects
dp_smallLinearisation for a pressure loss smaller then dp_small [Pa]
zeta_TOT_minMinimal pressure loss coefficient for infinite Reynolds number
zeta_TOT_maxMaximum pressure loss coefficient for Reynolds number approaching zero

Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.EdgedBend Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.EdgedBend

Input for bend

Information

Extends from Modelica.Icons.Record (Icon for records).

Parameters

NameDescription
Bend
d_hydHydraulic diameter [m]
deltaAngle of turning [rad]
KRoughness (absolute average height of surface asperities) [m]

Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.SuddenChange Modelica.Fluid.Dissipation.Utilities.Records.PressureLoss.SuddenChange

Input for sudden change of diameter

Information

Extends from Modelica.Icons.Record (Icon for records).

Parameters

NameDescription
Orifice
A_1Small cross sectional area of orifice [m2]
A_2Large cross sectional area of orifice [m2]
C_1Small perimeter of orifice [m]
C_2Large perimeter of orifice [m]
Automatically generated Thu Oct 1 16:08:00 2020.