This document discusses performing a finite element analysis (FEA) thermal analysis of a furnace to determine temperature distribution and heat flux. It provides details on the furnace dimensions, material properties of the concrete and brick walls, convection heat transfer coefficients, and temperatures of the furnace interior and surrounding air. The steps outlined include defining element types, material thermal conductivities, modeling the furnace geometry, meshing, and assigning material numbers to the concrete and brick walls in the FEA software before running the thermal analysis.

1. FEA Thermal Analysis
Temperature Distribution and
Heat Flux of a Furnace
Prof. Charlton S. Inao

2. CONDUCTION

3. CONVECTION

4. RADIATION

7. Given Data:
• Outer Wall, 300 x 300
• Inner Wall , 120 x 120
• Furnace opening , 100x 100
• Kc= 0.01 W/mK, thermal conductivity of the concrete wall (Mat’l No.
1)
• Kb=0.0057 W/mK, thermal conductivity of the brick wall (Material
No.2)
• T=673 K temp within the furnace
• K1= 0.208 W/m2K, convection heat transfer coefficient in the furnace
• Ta= 253 K temperature of the surrounding air, where the outside wall
is exposed to.
• K2=0.068 W/m2K, convection heat transfer coefficient of the outside
wall and the surrounding air

9. Define Element types

10. Thermal conductivity for material No.1

12. Thermal conductivity for Material No. 2
Click Material (pull down menu), then
New Model

14. Modeling of a Furnace

18. Outline of Brick and Concrete Wall

19. Define Mesh Size Controls

21. Glue the areas, after performing mesh size
controls,

22. Before meshing is done, it is
necessary to specify material
numbers for the
concrete and the brick walls.
From ANSYS Main Menu select
Preprocessor →Meshing →Mesh
Attributes→ Picked Areas.

23. Specify Material Numbers for the
Concrete(1) and Brick (2) Walls

25. Material Number for Concrete Wall
Preprocessor >Meshing>Mesh Attribute>Pick Areas

26. Material Number for Brick Wall

27. After defining the two areas, we can now Mesh the area., free

28. Be sure material numbering is ON, in
Plot Controls ,Numbering, Attribute
Numbering, Material Number