WOLFRAM SYSTEMMODELER

PartialPipeFlowHeatTransfer

Base class for pipe heat transfer correlation in terms of Nusselt number heat transfer in a circular pipe for laminar and turbulent one-phase flow

Wolfram Language

In[1]:=
SystemModel["Modelica.Fluid.Pipes.BaseClasses.HeatTransfer.PartialPipeFlowHeatTransfer"]
Out[1]:=

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

Base class for heat transfer models that are expressed in terms of the Nusselt number and which can be used in distributed pipe models.

Parameters (6)

n

Value: 1

Type: Integer

Description: Number of heat transfer segments

use_k

Value: false

Type: Boolean

Description: = true to use k value for thermal isolation

k

Value: 0

Type: CoefficientOfHeatTransfer (W/(m²·K))

Description: Heat transfer coefficient to ambient

T_ambient

Value: system.T_ambient

Type: Temperature (K)

Description: Ambient temperature

nParallel

Value:

Type: Real

Description: number of identical parallel flow devices

alpha0

Value: 100

Type: CoefficientOfHeatTransfer (W/(m²·K))

Description: guess value for heat transfer coefficients

Inputs (6)

states

Type: ThermodynamicState[n]

Description: Thermodynamic states of flow segments

surfaceAreas

Type: Area[n] (m²)

Description: Heat transfer areas

vs

Type: Velocity[n] (m/s)

Description: Mean velocities of fluid flow in segments

lengths

Type: Length[n] (m)

Description: Lengths along flow path

dimensions

Type: Length[n] (m)

Description: Characteristic dimensions for fluid flow (diameter for pipe flow)

roughnesses

Type: Roughness[n] (m)

Description: Average heights of surface asperities

Outputs (1)

Q_flows

Type: HeatFlowRate[n] (W)

Description: Heat flow rates

Connectors (1)

heatPorts

Type: HeatPorts_a[n]

Description: Heat port to component boundary

Components (2)

states

Type: ThermodynamicState[n]

Description: Thermodynamic states of flow segments

system

Type: System

Description: System wide properties

Extended by (1)

LocalPipeFlowHeatTransfer

Modelica.Fluid.Pipes.BaseClasses.HeatTransfer

LocalPipeFlowHeatTransfer: Laminar and turbulent forced convection in pipes, local coefficients