modelFFTF
FFTF: Liquid metal rod bundle; 20 <= Pe <= 1000
Extends from TRANSFORM.Fluid.Pipes_Obsolete.ClosureModels.HeatTransfer.BaseClasses.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).
Information
The FFTF liquid metal rod bundle heat transfer correlation was created for the Fast Fission Test Facility (FFTF) fuel assembly.
The correlation was taken from the following textbook:
AlanE. Waltar, Donald R. Todd, Pavel V. Tsvetkov
Fast Spectrum Reactors 2012
eq. 9.35 pg. 257
and is reported valid for:
- liquid metal coolant
- 20 <= Peclet Number <= 1000
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | PDratio | Tube Pitch to Diameter ratio | |
| Internal Interface | |||
| Integer | nHT (from PartialHeatTransfer) | 1 | Number of heat transfer segments |
| Boolean | use_k (from PartialHeatTransfer) | false | = true to use k value for thermal isolation |
| Ambient | |||
| SI.CoefficientOfHeatTransfer | k (from PartialHeatTransfer) | 0 | Heat transfer coefficient to ambient |
| SI.Temperature | T_ambient (from PartialHeatTransfer) | system.T_ambient | Ambient temperature |
| Internal Interface › Geometry | |||
| Real | nParallel (from PartialFlowHeatTransfer) | number of identical parallel flow devices | |
| Initialization | |||
| SI.CoefficientOfHeatTransfer | alphas_start (from PartialFlowHeatTransfer) | heat transfer coefficient | |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Fluid.Interfaces.HeatPorts_a | heatPorts (from PartialHeatTransfer) | Heat port to component boundary |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Medium.ThermodynamicState | states (from PartialHeatTransfer) | Thermodynamic states of flow segments | |
| SI.Area | surfaceAreas (from PartialHeatTransfer) | Heat transfer areas | |
| SI.HeatFlowRate | Q_flows (from PartialHeatTransfer) | Heat flow rates | |
| Modelica.Fluid.System | system (from PartialHeatTransfer) | System wide properties | |
| SI.Temperature | Ts (from PartialHeatTransfer) | Medium.temperature(states) | Temperatures defined by fluid states |
| SI.MassFlowRate | m_flows (from PartialFlowHeatTransfer) | Mean flow rate in segments | |
| SI.Length | lengths (from PartialFlowHeatTransfer) | Lengths along flow path | |
| SI.Length | dimensions (from PartialFlowHeatTransfer) | Characteristic dimensions for fluid flow (diameter for pipe flow) | |
| SI.Area | crossAreas (from PartialFlowHeatTransfer) | Cross flow area of flow segments | |
| SI.Height | roughnesses (from PartialFlowHeatTransfer) | Average heights of surface asperities | |
| SI.CoefficientOfHeatTransfer | alphas (from PartialFlowHeatTransfer) | Coefficient of heat transfer | |
| Real | Res (from PartialPipeFlowHeatTransfer) | Reynolds numbers | |
| Real | Prs (from PartialPipeFlowHeatTransfer) | Prandtl numbers | |
| Real | Nus (from PartialPipeFlowHeatTransfer) | Nusselt numbers | |
| Medium.Density | ds (from PartialPipeFlowHeatTransfer) | Densities | |
| Medium.DynamicViscosity | mus (from PartialPipeFlowHeatTransfer) | Dynamic viscosities | |
| Medium.ThermalConductivity | lambdas (from PartialPipeFlowHeatTransfer) | Thermal conductivity | |
| Real | Pes | Peclet Number |