Stationary heat propagation in a plate (ring section) under mixed boundary conditions of the first and third kind (given temperature and convection)

Verification of the LIRA-FEM software / Stationary heat propagation in a plate (ring section) under mixed boundary conditions of the first and third kind (given temperature and convection) / Société Fançajse des Mécaniciens, Commission Validation des progiciels de calcul de Structures, groupe de travail Thermique (2D et 3D) et thermoélasticité, Pan‘s, 1989.



Stationary heat propagation in a plate (ring section) under mixed boundary conditions of the first and third kind (given temperature and convection)

Type of analysis: stationary thermal.

Source: Société Fançajse des Mécaniciens, Commission Validation des progiciels de calcul de Structures, groupe de travail Thermique (2D et 3D) et thermoélasticité, Pan‘s, 1989.


Geometry:

Inner Radius: Ri=0.3m

Outer Radius: Re=0.35m

Length: L

Material characteristics:

 

Thermal conductivity coefficient:λ=1W/m0C

 

Boundary conditions:

 

Cylinder inner radius:

convective heat transfer coefficient h=30.0 W/m2 °C,

set temperature for convection elements =100°С.

 

Outer radius of the cylinder:

set temperature Te=20.0°C.

 

Calculation method used to obtain the reference solution:

 

 3_1.jpg

 

 

CALCULATION RESULTS:

R(m)

Desired value

Analytical solution

Calculation results (LIRA-SAPR)

Error,%

0.30

Т (0С)

66.49

67.07

0.87

0.31

Т (0С)

56.60

57.05

0.80

0.32

Т (0С)

47.03

47.36

0.70

0.33

Т (0С)

37.75

37.97

0.58

0.34

Т (0С)

28.74

28.85

0.38

0.35

Т (0С)

20.00

20

0

 [0.3÷0.35]  3_2.jpg     1894.94      1862.30 1.72 

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