modelDittusBoelter
Dittus-Boelter heat transfer correlation
Extends from BaseClasses.DistributedHeatTransferFEM (Base class for distributed heat transfer models - finite elements).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Length | l (from DistributedHeatTransferFEM) | L/(Nw) | Length of a single volume |
| Boolean | heating | true | true if fluid is heated, false if fluid is cooled |
| Real | Re_min | 10000 | Minimum Reynolds number |
| Real | Pr_min | 0.7 | Minimum Prandtl number |
| Real | Pr_max | 160 | Maximum Prandtl number |
| Set by Flow1D model | |||
| Integer | Nf (from DistributedHeatTransferFEM) | 2 | Number of nodes on the fluid side |
| Integer | Nw (from DistributedHeatTransferFEM) | Nf | Number of nodes on the wall side |
| Integer | Nt (from DistributedHeatTransferFEM) | Number of tubes in parallel | |
| SI.Distance | L (from DistributedHeatTransferFEM) | Tube length | |
| SI.Area | A (from DistributedHeatTransferFEM) | Cross-sectional area (single tube) | |
| SI.Length | omega (from DistributedHeatTransferFEM) | Wet perimeter of heat transfer surface (single tube) | |
| SI.Length | Dhyd (from DistributedHeatTransferFEM) | Hydraulic Diameter (single tube) | |
| SI.MassFlowRate | wnom (from DistributedHeatTransferFEM) | Nominal mass flow rate (single tube) | |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| ThermoPower.Thermal.DHTNodes | wall (from DistributedHeatTransferFEM) |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Medium.ThermodynamicState[Nf] | fluidState (from DistributedHeatTransferFEM) | ||
| Medium.MassFlowRate[Nf] | w (from DistributedHeatTransferFEM) | ||
| Medium.Temperature[Nf] | T (from DistributedHeatTransferFEM) | Temperatures at the fluid side nodes | |
| Medium.Temperature[Nw] | Tw (from DistributedHeatTransferFEM) | Temperatures of the wall volumes | |
| SI.HeatFlux[Nw] | phi_w (from DistributedHeatTransferFEM) | Heat fluxes entering from the wall connector | |
| SI.HeatFlux[Nf] | phi_f (from DistributedHeatTransferFEM) | phi_w | Heat fluxes going to the fluid nodes |
| SI.CoefficientOfHeatTransfer[Nf] | gamma | Heat transfer coefficients at the nodes | |
| Medium.DynamicViscosity[Nf] | mu | Dynamic viscosity | |
| Medium.ThermalConductivity[Nf] | k | Thermal conductivity | |
| Medium.SpecificHeatCapacity[Nf] | cp | Heat capacity at constant pressure | |
| SI.PerUnit[Nf] | Re | Reynolds number | |
| SI.PerUnit[Nf] | Pr | Prandtl numbers | |
| SI.PerUnit[Nf] | Re_l | Reynolds number limited to validity range | |
| SI.PerUnit[Nf] | Pr_l | Prandtl number limited to validity range |