Modelica.Fluid.Dissipation.HeatTransfer.General

Information

General heat transfer

Approximated forced convection

Approximate calculation of the mean convective heat transfer coefficient kc for forced convection with a fully developed fluid flow in a turbulent regime. See more information.

Package Content

Name	Description
kc_approxForcedConvection	Mean convective heat transfer coefficient for forced convection | approximation | turbulent regime | hydrodynamically developed fluid flow
kc_approxForcedConvection_KC	Mean convective heat transfer coefficient for forced convection | approximation | turbulent regime | hydrodynamically developed fluid flow
kc_approxForcedConvection_IN_con	Input record for function kc_approxForcedConvection and kc_approxForcedConvection_KC
kc_approxForcedConvection_IN_var	Input record for function kc_approxForcedConvection and kc_approxForcedConvection_KC

Modelica.Fluid.Dissipation.HeatTransfer.General.kc_approxForcedConvection

Information

Approximate calculation of the mean convective heat transfer coefficient kc for forced convection with a fully developed fluid flow in a turbulent regime.

A detailed documentation for this convective heat transfer calculation can be found in its underlying function kc_approxForcedConvection_KC . Note that additionally a failure status is observed in this function to check if the intended boundary conditions are fulfilled. See more information .

Inputs

Name	Description
Constant inputs
IN_con	Input record for function kc_approxForcedConvection
Variable inputs
IN_var	Input record for function kc_approxForcedConvection

Outputs

Name	Description
Output
kc	Convective heat transfer coefficient [W/(m2.K)]
Pr	Prandtl number [1]
Re	Reynolds number [1]
Nu	Nusselt number [1]
failureStatus	0== boundary conditions fulfilled | 1== failure >> check if still meaningful results

Modelica.Fluid.Dissipation.HeatTransfer.General.kc_approxForcedConvection_KC

Information

Approximate calculation of the mean convective heat transfer coefficient kc for forced convection with a fully developed fluid flow in a turbulent regime. See more information .

Inputs

Name	Description
Constant inputs
IN_con	Input record for function kc_approxForcedConvection_KC
Variable inputs
IN_var	Input record for function kc_approxForcedConvection_KC

Outputs

Name	Description
kc	Output for function kc_approxForcedConvection_KC [W/(m2.K)]

Modelica.Fluid.Dissipation.HeatTransfer.General.kc_approxForcedConvection_IN_con

Information

Parameters

Name	Description
Generic variables
target	Target correlation
A_cross	Cross sectional area [m2]
perimeter	Wetted perimeter [m]
exp_Pr	Exponent for Prandtl number w.r.t. Dittus/Boelter | 0.4 for heating | 0.3 for cooling

Modelica.Fluid.Dissipation.HeatTransfer.General.kc_approxForcedConvection_IN_var

Information

Parameters

Name	Description
Fluid properties
cp	Specific heat capacity of fluid at constant pressure [J/(kg.K)]
eta	Dynamic viscosity of fluid [Pa.s]
lambda	Thermal conductivity of fluid [W/(m.K)]
rho	Density of fluid [kg/m3]
eta_wall	Dynamic viscosity of fluid at wall temperature [Pa.s]
Input
m_flow	[kg/s]