modelDittusBoelter

The Dittus-Boelter correlation for turbulent single phase flow
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Extends from BaseClasses.PartialTPRePrCorrelation (Base class for Reynolds and Prandtl number correlations).

Information

The model DittusBoelter extends the partial model PartialTPRePrCorrelation and allows the user to define the value of the hydraulic diameter for the calculation of the heat transfer coefficient based on the DittusBoelter correlation.

Parameters

TypeNameDefaultDescription
Reala (from PartialTPRePrCorrelation)0.500Factor
Realb (from PartialTPRePrCorrelation)0.800Reynolds exponent
Realc (from PartialTPRePrCorrelation)0.600Prandl exponent
Modelica.SIunits.Lengthd_hydHydraulic diameter (2*V/A_lateral)
Modelica.SIunits.AreaA_croModelica.Constants.pi*d_hyd^2/4Cross sectional area
Realn0.40.4 for heating and 0.3 for cooling

Components

TypeNameDefaultDescription
Medium.ThermodynamicStatestate (from PartialSinglePhaseCorrelation)Thermodynamic state
Modelica.SIunits.MassFlowRatem_dot (from PartialSinglePhaseCorrelation)Inlet massflow
Modelica.SIunits.HeatFluxq_dot (from PartialSinglePhaseCorrelation)Heat flow rate per area [W/m2]
Modelica.SIunits.CoefficientOfHeatTransferU (from PartialSinglePhaseCorrelation)
Modelica.SIunits.LengthcLen (from PartialTPRePrCorrelation)Characteristic length
Modelica.SIunits.VelocitycVel (from PartialTPRePrCorrelation)Characteristic velocity
Modelica.SIunits.ReynoldsNumberRe (from PartialTPRePrCorrelation)
Modelica.SIunits.PrandtlNumberPr (from PartialTPRePrCorrelation)
Modelica.SIunits.NusseltNumberNu (from PartialTPRePrCorrelation)
Medium.ThermalConductivitylambda (from PartialTPRePrCorrelation)
Medium.DynamicViscosityeta (from PartialTPRePrCorrelation)
Medium.Densityrho (from PartialTPRePrCorrelation)
Medium.ThermodynamicStatefilteredState (from PartialTPRePrCorrelation)Thermodynamic state
Modelica.SIunits.VolumeFlowRateV_dot