Convection type

Use reference

for Natural / Forced

Natural / Forced convection type

Use Correction input

Natural

false

-

false or true

true

Vertical (Ra:10^4-10^13)

false or true

Horizontal Upper Warm(Ra:10^4-10^11)

false or true

Horizontal Upper Cold (Ra:10^5-10^11)

false or true

Forced

false

-

false or true

true

Tube and Duct

false or true

Over flat plates

false or true

Over a cylinder

false or true

Over a sphere

false or true

Constant

-

-

false or true

External input

-

-

false or true

Name

Units

Condition

Description

Modelica ID

$\mathrm{solid}\left[i\right]$

-

-

i-th thermal port of the solid side

solid[i]

$\mathrm{fluid}\left[i\right]$

-

-

i-th thermal port of the fluid side

fluid[i]

$h\mathrm{in}$

$\frac{W}{m^2\cdot K}$

if Convection type is
External input.

Input signal of the heat transfer coefficient

h_in

$v$

$\frac{m}{s}$

if Convection type is
Forced.

Input signal of Wind speed for Forced convection

v

$\mathrm{cor}\left[i\right]$

-

if use correction input is
true.

Input signal of the correction factor for $Q_{\mathrm{flow}}$

cor[i]

Symbol

Default

Units

Description

Modelica ID

$\mathrm{Convection} \mathrm{Type}$

$\mathrm{Natural}$

Select Type of Convection

 Natural : Natural convection

 Forced : Force convection

 Constant : Constant heat transfer coefficient

 External input : Heat transfer coefficient given by input

TypeOfMedium

$\mathrm{Use}\mathit{ }\mathrm{reference}\mathit{ }\mathit{for}\mathit{ }\mathrm{Natural}$

$\mathrm{false}$

If true, all parameters are defined by references.

use_reference_natural

$\mathrm{Natural} \mathrm{Convection} \mathrm{Type}$

$\mathrm{Vertical}\left(\mathrm{Ra}\:10\^4-10\^13\right)$

Geometry type of Natural convection as references

NaturalConvecType

$\mathrm{Use}\mathit{ }\mathrm{reference}\mathit{ }\mathit{for}\mathit{ }\mathrm{Forced}$

$\mathrm{false}$

If true, all parameters are defined by references.

use_reference_forced

$\mathrm{Forced} \mathrm{Convection} \mathrm{Type}$

$\mathrm{Tube}\mathit{ }\mathit{and}\mathit{ }\mathrm{Duct}$

Geometry type of Natural convection as references

ForcedConvecType

$A$

$1.0$

$m^2$

Area of flow of each node

A

$X$

$1.0$

$m$

Streamwise length

X

$p$

$101325$

$\mathrm{Pa}$

Air pressure

p

$\mathrm{Nodes}$

$2$

Number of node

numNode

$C_{\mathrm{forced}}$ 

$0.664$

Gain parameter for Reynolds number in the generalized experimental equation of Forced convection generalized equation

$C_{\mathrm{forced}}\cdot \left({\mathrm{Re}}^{m_{\mathrm{forced}}}-{\mathrm{offset}}_{\mathrm{forced}}\right)\cdot {\mathrm{Pr}}^{n_{\mathrm{forced}}}$

C_forced

$m_{\mathrm{forced}}$

$\frac{1}{2}$

Exponent parameter for Reynolds number in the generalized experimental equation of Forced convection generalized equation

m_forced

${\mathrm{offset}}_{\mathrm{forced}}$

$0$

Offset parameter for Reynolds number in the generalized experimental equation of Forced convection generalized equation

offset_forced

$n_{\mathrm{forced}}$

$\frac{1}{3}$

Exponent parameter for Prandtl number in the generalized experimental equation of Forced convection generalized equation

n_forced

$C_{\mathrm{lam}}$

$0.59$

Gain parameter for Reynolds number in the generalized experimental equation of Natural convection generalized equation when Fluid is laminar

C_lam

$n_{\mathrm{lam}}$

$\frac{1}{4}$

Exponent parameter for Reynolds number in the generalized experimental equation of Natural convection generalized equation when Fluid is laminar

n_lam

$C_{\mathrm{tur}}$

$0.1$

Gain parameter for Reynolds number in the generalized experimental equation of Natural convection generalized equation when Fluid is Turbulent

C_tur

$n_{\mathrm{tur}}$

$\frac{1}{3}$

Exponent parameter for Reynolds number in the generalized experimental equation of Natural convection generalized equation when Fluid is Turbulent

n_tur

$\mathrm{Threshold}$

${10}^9$

Threshold value for Reynolds number to define Laminar or Turbulent

TH

$h$

$1$

$\frac{W}{m^2\cdot K}$

Constant heat transfer coefficient

h

$\mathrm{Use} \mathrm{Correction} \mathrm{input}$

$\mathrm{false}$

If true, input of correction for h is valid

use_correction