Fluid Properties Check
Accessory component to check Fluid properties
Description
Equations
Variables
Connections
Parameters
See Also
The Fluid Properties Check component models Air fluid properties calculation.
Before using HeatConvection component and components in Air and Water subpackage, you can check how to calculate fluid properties
which are used for the component internally.
And, if you'd like to define your own definition for the heat transfer coefficient calculation, this component is helpful to get the fluid properties.
Average temperature is :
T=Tin1−Tin22
Type of Media = Actual Air (CoolProp)
Density of Air calculated from pressure and temperature :
ρ=Function__ρpin, Tin1
(Function__ρ call a function of CoolProp library internally)
Specific enthalpy of Air calculated from pressure and temperature :
hflow=Function__hflowpin, Tin1 (Function__hflow call a function of CoolProp library internally)
Viscosity of Air calculated from pressure and temperature is :
μ=Function__μpin, Tin1(Function__μ call a function of CoolProp library internally)
Thermal conductivity of Air calculated from pressure and temperature is :
k=Function__kpin, Tin1(Function__k call a function of CoolProp library internally)
Specific heat capacity at the constant pressure of Air calculated from pressure and temperature is :
c__p=Function__c__ppin, Tin1
(Function__c__p call a function of CoolProp library internally)
Reynolds number of Air calculated from pressure and temperature is :
Re=Function__Repin, Tin1, Tin2, X, Vin
( Re=ρ⋅Vin⋅Xμ, and ρ and μ is calculated from pin and T )
Prandtl number of Air calculated from pressure and temperature is :
Pr=Function__Prpin, Tin1, Tin2, X
( Pr=c__p⋅μk, and c__p and μ and k is calculated from pin and T )
Grashof number of Air calculated from pressure and temperature is :
Gr=Function__Grpin, Tin1, Tin2,9.81, X
( Gr=g⋅β⋅T[1]−T[2]⋅X3μ2, and g=9.81, β=1T,μ and ρ is calculated from pin and T )
Type of Media = Ideal Air (NASA Poly)
ρ=pinR__gas⋅Tin1
hflow=Function__hflowTin1 (Function__hflow call a function of a NASA Polynomial internally)
μ=Function__μTin1(Function__μ call a fitted equation internally)
k=Function__k Tin1(Function__k call a fitted equation internally)
c__p=Function__c__pTin1
(Function__c__p call a function of NASA Polynomial internally)
Re=Function__ReTin1, Tin2, X, Vin
( Re=ρ⋅Vin⋅Xμ, and ρ and μ is calculated from T )
Pr=Function__PrTin1, Tin2, X
( Pr=c__p⋅μk, and c__p and μ and k is calculated from T )
Gr=Function__GrTin1, Tin2,9.81, X
( Gr=g⋅β⋅T[1]−T[2]⋅X3μ2, and g=9.81, β=1T,μ and ρ is calculated from T )
Type of Media = Simple Air (Constant)
ρ=pinR__gas⋅Tin1
Specific enthalpy of Air calculated from temperature :
hflow=c__p⋅T+hflow__off
hflow__off=124648.4919
Viscosity of Air is a constant μ.
Thermal conductivity of Air is a constant k.
Specific heat capacity at the constant pressure of Air is a constant c__p.
Reynolds number of Air is :
Re=ρ⋅Vin⋅Xμ
Prandtl number of Air is :
Pr=c__p⋅μk
Grashof number of Air is :
Gr=9.81⋅1T⋅T[1]−T[2]⋅X3μ2
Type of Media = Water (IAPWS/IF97)
Density of Water calculated from pressure and temperature :
(Function__ρ call a function of Modelica.Media.Water,IAPWS/IF97, internally)
hflow=Function__hflowpin, Tin1 (Function__hflow call a function of Modelica.Media.Water,IAPWS/IF97, internally)
μ=Function__μpin, Tin1(Function__μ call a function of Modelica.Media.Water,IAPWS/IF97, internally)
k=Function__kpin, Tin1(Function__k call a function of Modelica.Media.Water,IAPWS/IF97, internally)
(Function__c__p call a function of Modelica.Media.Water,IAPWS/IF97, internally)
Type of Media = Liquid water (Lookup table of IAPWS/IF97)
ρ=LUT__ρpin, Tin1
(LUT__ρ is a lookup table which is generated with Modelica.Media.Water, IAPWS/IF97)
hflow=LUT__hflowpin, Tin1 (LUT__hflow is a lookup table which is generated with Modelica.Media.Water, IAPWS/IF97)
μ=LUT__μpin, Tin1(LUT__μ is a lookup table which is generated with Modelica.Media.Water, IAPWS/IF97)
k=LUT__kpin, Tin1(LUT__k is a lookup table which is generated with Modelica.Media.Water, IAPWS/IF97)
c__p=LUT__c__ppin, Tin1
(LUT__c__p is a lookup table which is generated with Modelica.Media.Water, IAPWS/IF97)
Pr=c__p⋅μ)
Gr=g⋅β⋅T[1]−T[2]⋅X3μ2
β=1T
Specific enthalpy of Water calculated from temperature :
hflow=c__p⋅T+hflow__off hflow__off=−1142798.49977
Thermal conductivity of Water is a constant k.
Specific heat capacity at the constant pressure of Water is a constant c__p.
Reynolds number of Water is :
Prandtl number of Water is :
Grashof number of Water is :
Outputs are :
out1=ρ
out2=hflow
out3=μ
out4=k
out5=c__p
out6=Re
out7=Pr
out8=Gr
Symbol
Units
Modelica ID
T__
K
Averaged temperature between Tin[1] and Tin[2]
ρ
kgm3
Density of Air
μ
m2s
Dynamic viscosity of Air
k
Wm⋅K
Thermal conductivity of Air
c__p
Jkg⋅K
Specific heat capacity at the constant pressure of Air
Re
Reynolds number
Pr
Prandtl number
Gr
Grashof number
g
ms2
Acceleration of gravity
β
1K
Volume coefficient of expansion
Name
Condition
pin
Pa
-
Pressure input
Tin2
Temperature inputs
Tin[2]
Vin
ms
Wind speed
out8
Air fluid properties
1 : Density
2 : Specific enthalpy
3 : Dynamic viscosity
4 : Thermal conductivity
5 : Specific heat capacity at the constant pressure
6 : Reynolds number
7 : Prandtl number
8 : Grashof number
out[8]
Default
Type of Media
Actual Air CoolProp
−
Select type of media
- Actual Air (CoolProp)
- Ideal Air (NASA Poly)
- Simple Air (Constant)
- Water (IAPWS/IF97)
- Liquid Water (Lookup table of IAPWS/IF97)
- Simple Water (Constant)
TypeOfMedia
X
1.0
m
Streamwise length
Heat Transfer Library Overview
Properties Overview
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