Modelica.Fluid.Pipes.BaseClasses.WallFriction.PartialWallFriction

Partial wall friction characteristic (base package of all wall friction characteristics)

Information



Extends from Modelica.Icons.Package (Icon for standard packages).

Package Content

NameDescription
use_mu=true= true, if mu_a/mu_b are used in function, otherwise value is not used
use_roughness=true= true, if roughness is used in function, otherwise value is not used
use_dp_small=true= true, if dp_small is used in function, otherwise value is not used
use_m_flow_small=true= true, if m_flow_small is used in function, otherwise value is not used
dp_is_zero=false= true, if no wall friction is present, i.e., dp = 0 (function massFlowRate_dp() cannot be used)
use_Re_turbulent=true= true, if Re_turbulent input is used in function, otherwise value is not used
Modelica.Fluid.Pipes.BaseClasses.WallFriction.PartialWallFriction.massFlowRate_dp massFlowRate_dp Return mass flow rate m_flow as function of pressure loss dp, i.e., m_flow = f(dp), due to wall friction
Modelica.Fluid.Pipes.BaseClasses.WallFriction.PartialWallFriction.massFlowRate_dp_staticHead massFlowRate_dp_staticHead Return mass flow rate m_flow as function of pressure loss dp, i.e., m_flow = f(dp), due to wall friction and static head
Modelica.Fluid.Pipes.BaseClasses.WallFriction.PartialWallFriction.pressureLoss_m_flow pressureLoss_m_flow Return pressure loss dp as function of mass flow rate m_flow, i.e., dp = f(m_flow), due to wall friction
Modelica.Fluid.Pipes.BaseClasses.WallFriction.PartialWallFriction.pressureLoss_m_flow_staticHead pressureLoss_m_flow_staticHead Return pressure loss dp as function of mass flow rate m_flow, i.e., dp = f(m_flow), due to wall friction and static head

Modelica.Fluid.Pipes.BaseClasses.WallFriction.PartialWallFriction.massFlowRate_dp Modelica.Fluid.Pipes.BaseClasses.WallFriction.PartialWallFriction.massFlowRate_dp

Return mass flow rate m_flow as function of pressure loss dp, i.e., m_flow = f(dp), due to wall friction

Information



Extends from Modelica.Icons.Function (Icon for functions).

Inputs

NameDescription
dpPressure loss (dp = port_a.p - port_b.p) [Pa]
rho_aDensity at port_a [kg/m3]
rho_bDensity at port_b [kg/m3]
mu_aDynamic viscosity at port_a (dummy if use_mu = false) [Pa.s]
mu_bDynamic viscosity at port_b (dummy if use_mu = false) [Pa.s]
lengthLength of pipe [m]
diameterInner (hydraulic) diameter of pipe [m]
roughnessAbsolute roughness of pipe, with a default for a smooth steel pipe (dummy if use_roughness = false) [m]
dp_smallRegularization of zero flow if |dp| < dp_small (dummy if use_dp_small = false) [Pa]
Re_turbulentTurbulent flow if Re >= Re_turbulent (dummy if use_Re_turbulent = false) [1]

Outputs

NameDescription
m_flowMass flow rate from port_a to port_b [kg/s]

Modelica.Fluid.Pipes.BaseClasses.WallFriction.PartialWallFriction.massFlowRate_dp_staticHead Modelica.Fluid.Pipes.BaseClasses.WallFriction.PartialWallFriction.massFlowRate_dp_staticHead

Return mass flow rate m_flow as function of pressure loss dp, i.e., m_flow = f(dp), due to wall friction and static head

Information



Extends from Modelica.Icons.Function (Icon for functions).

Inputs

NameDescription
dpPressure loss (dp = port_a.p - port_b.p) [Pa]
rho_aDensity at port_a [kg/m3]
rho_bDensity at port_b [kg/m3]
mu_aDynamic viscosity at port_a (dummy if use_mu = false) [Pa.s]
mu_bDynamic viscosity at port_b (dummy if use_mu = false) [Pa.s]
lengthLength of pipe [m]
diameterInner (hydraulic) diameter of pipe [m]
g_times_height_abGravity times (Height(port_b) - Height(port_a))
roughnessAbsolute roughness of pipe, with a default for a smooth steel pipe (dummy if use_roughness = false) [m]
dp_smallRegularization of zero flow if |dp| < dp_small (dummy if use_dp_small = false) [Pa]
Re_turbulentTurbulent flow if Re >= Re_turbulent (dummy if use_Re_turbulent = false) [1]

Outputs

NameDescription
m_flowMass flow rate from port_a to port_b [kg/s]

Modelica.Fluid.Pipes.BaseClasses.WallFriction.PartialWallFriction.pressureLoss_m_flow Modelica.Fluid.Pipes.BaseClasses.WallFriction.PartialWallFriction.pressureLoss_m_flow

Return pressure loss dp as function of mass flow rate m_flow, i.e., dp = f(m_flow), due to wall friction

Information



Extends from Modelica.Icons.Function (Icon for functions).

Inputs

NameDescription
m_flowMass flow rate from port_a to port_b [kg/s]
rho_aDensity at port_a [kg/m3]
rho_bDensity at port_b [kg/m3]
mu_aDynamic viscosity at port_a (dummy if use_mu = false) [Pa.s]
mu_bDynamic viscosity at port_b (dummy if use_mu = false) [Pa.s]
lengthLength of pipe [m]
diameterInner (hydraulic) diameter of pipe [m]
roughnessAbsolute roughness of pipe, with a default for a smooth steel pipe (dummy if use_roughness = false) [m]
m_flow_smallRegularization of zero flow if |m_flow| < m_flow_small (dummy if use_m_flow_small = false) [kg/s]
Re_turbulentTurbulent flow if Re >= Re_turbulent (dummy if use_Re_turbulent = false) [1]

Outputs

NameDescription
dpPressure loss (dp = port_a.p - port_b.p) [Pa]

Modelica.Fluid.Pipes.BaseClasses.WallFriction.PartialWallFriction.pressureLoss_m_flow_staticHead Modelica.Fluid.Pipes.BaseClasses.WallFriction.PartialWallFriction.pressureLoss_m_flow_staticHead

Return pressure loss dp as function of mass flow rate m_flow, i.e., dp = f(m_flow), due to wall friction and static head

Information



Extends from Modelica.Icons.Function (Icon for functions).

Inputs

NameDescription
m_flowMass flow rate from port_a to port_b [kg/s]
rho_aDensity at port_a [kg/m3]
rho_bDensity at port_b [kg/m3]
mu_aDynamic viscosity at port_a (dummy if use_mu = false) [Pa.s]
mu_bDynamic viscosity at port_b (dummy if use_mu = false) [Pa.s]
lengthLength of pipe [m]
diameterInner (hydraulic) diameter of pipe [m]
g_times_height_abGravity times (Height(port_b) - Height(port_a))
roughnessAbsolute roughness of pipe, with a default for a smooth steel pipe (dummy if use_roughness = false) [m]
m_flow_smallRegularization of zero flow if |m_flow| < m_flow_small (dummy if use_m_flow_small = false) [kg/s]
Re_turbulentTurbulent flow if Re >= Re_turbulent (dummy if use_Re_turbulent = false) [1]

Outputs

NameDescription
dpPressure loss (dp = port_a.p - port_b.p) [Pa]

Automatically generated Mon Sep 23 17:20:46 2013.