modelDynamicOnePhaseFlowPipe

Dynamic one-phase flow pipe

Information

## Copyright © EDF 2002 - 2026  
## ThermoSysPro Version 4.2

Parameters

Type	Name	Default	Description
Units.SI.Length	L	10.	Pipe length
Units.SI.Diameter	D	0.2	Internal pipe diameter
Real	rugosrel	0.0007	Pipe relative roughness
Real	ntubes	1	Number of pipes in parallel
Units.SI.Position	z1	0	Pipe inlet altitude
Units.SI.Position	z2	0	Pipe outlet altitude
Real	dpfCorr	1.00	Corrective term for the friction pressure loss (dpf) for each node
Real	hcCorr	1.00	Corrective term for the heat exchange coefficient (hc) for each node
Integer	Ns	10	Number of segments
Units.SI.Temperature[Ns]	T0	fill(290, Ns)	Initial fluid temperature (active if steady_state = false and option_temperature = 1)
Units.SI.SpecificEnthalpy[Ns]	h0	fill(1e5, Ns)	Initial fluid specific enthalpy (active if steady_state = false and option_temperature = 2)
Boolean	inertia	true	true: momentum balance equation with inertia - false: without inertia
Boolean	advection	false	true: momentum balance equation with advection terme - false: without advection terme
Boolean	dynamic_mass_balance	true	true: dynamic mass balance equation - false: static mass balance equation
Boolean	simplified_dynamic_energy_balance	true	true: simplified dynamic energy balance equation - false: full dynamic energy balance equation (active if dynamic_mass_balance=true)
Boolean	steady_state	true	true: start from steady state - false: start from T0 (if option_temperature=1) or h0 (if option_temperature=2)
Integer	option_temperature	1	1:initial temperature is fixed - 2:initial specific enthalpy is fixed (active if steady_state = false)
Boolean	continuous_flow_reversal	true	true: continuous flow reversal - false: discontinuous flow reversal
Integer	mode	0	IF97 region. 1:liquid - 2:steam - 4:saturation line - 0:automatic

Connectors

Type	Name	Default	Description
Connectors.FluidInlet	C1
Connectors.FluidOutlet	C2
ThermoSysPro.Thermal.Connectors.ThermalPort[Ns]	CTh

Components

Type	Name	Description
Units.SI.AbsolutePressure[N + 1]	P	Fluid pressure in node i
Units.SI.MassFlowRate[N]	Q	Mass flow rate in node i
Units.SI.SpecificEnthalpy[N + 1]	h	Fluid specific enthalpy in node i
Units.SI.SpecificEnthalpy[N]	hb	Fluid specific enthalpy at the boundary of node i
Units.SI.Density[N - 1]	rho1	Fluid density in thermal node i
Units.SI.Density[N]	rho2	Fluid density in hydraulic node i
Units.SI.Density[N + 1]	rhoc	Fluid density at the boudary of node i
Units.SI.Power[N - 1]	dW1	Thermal power exchanged on the water side for node i
Units.SI.Power	W1t	Total power exchanged on the water side
Units.SI.Temperature[N - 1]	Tp	Wall temperature in node i
Units.SI.CoefficientOfHeatTransfer[N - 1]	hc	Fluid heat exchange coefficient in node i
Units.SI.ReynoldsNumber[N - 1]	Re1	Fluid Reynolds number in thermal node i
Units.SI.ReynoldsNumber[N]	Re2	Fluid Reynolds number in hydraulic node i
Real[N - 1]	Pr	Fluid Prandtl number in node i
Units.SI.ThermalConductivity[N - 1]	k	Fluid thermal conductivity in node i
Units.SI.DynamicViscosity[N - 1]	mu1	Fluid dynamic viscosity in thermal node i
Units.SI.DynamicViscosity[N]	mu2	Fluid dynamic viscosity in hydraulic node i
Units.SI.SpecificHeatCapacity[N - 1]	cp	Fluid specific heat capacity
Units.SI.Temperature[N - 1]	T1	Fluid temperature in thermal node i
Units.SI.Temperature[N]	T2	Fluid temperature in hydraulic node i
ThermoSysPro.Units.SI.PressureDifference[N]	dpa	Advection term for the mass balance equation in node i
ThermoSysPro.Units.SI.PressureDifference[N]	dpf	Friction pressure loss in node i
ThermoSysPro.Units.SI.PressureDifference[N]	dpg	Gravity pressure loss in node i
Real[N]	khi	Hydraulic pressure loss coefficient in node i
Real[N]	lambda	Friction pressure loss coefficient in node i
ThermoSysPro.Properties.WaterSteam.Common.ThermoProperties_ph[N - 1]	pro1
ThermoSysPro.Properties.WaterSteam.Common.ThermoProperties_ph[2]	proc
ThermoSysPro.Properties.WaterSteam.Common.ThermoProperties_ph[N]	pro2
ThermoSysPro.Properties.WaterSteam.Common.PropThermoSat[N - 1]	lsat
ThermoSysPro.Properties.WaterSteam.Common.PropThermoSat[N - 1]	vsat

Revisions

Authors  

Daniel Bouskela  
Baligh El Hefni