Home / Examples / Thermal Analysis [Watt] / Example 1: Temperature Distribution of Two Rods (Steady-State Analysis)

Example 1: Temperature Distribution of Two Rods (Steady-State Analysis)

General

• Two square rods with different thermal conductivities are placed closely and subjected to the common temperature boundary condition.
   

• The temperature distribution and the heat flux vectors are solved.
   

• Unless specified in the list below, the default conditions will be applied.
   

• Obtain this session's project file. (Right-click and choose 'Save link as')




• Results will vary depending on Femtet version and the PC environment.

 

Analysis Space

Item	Settings
Analysis Space	3D
Model Unit	mm

 

Analysis Conditions

Item	Settings
Solver	Thermal Analysis [Watt]
Analysis Type	Steady-state Analysis
Options	N/A

Model

Two box-shape solid bodies are created. One is of gold and the other is of stainless steel (SUS301). Their thermal conductivities are different.

The temperature boundary conditions are set on the top and bottom faces.

Body Attributes and Materials

Body Number/Type	Body Attribute Name	Material Name
0/Solid	VOL1	002_Au *
1/Solid	VOL2	500_SUS301 *

* Available from the material DB

Boundary Conditions

Boundary Condition Name/Topology	Tab	Boundary Condition Type	Settings
Top/Face	Heat	Temperature	100 [deg]
Bottom/Face	Heat	Temperature	0[deg]

 

Results

The temperature distribution is shown below.

Each rod has the same temperature distribution. The thermal conductivities are irrelevant.

 

The vectors of the heat flux are shown below.

The heat flux of gold is much higher than that of SUS. This is due to the difference of the thermal conductivity.

[Thermal Conductivity] Au: 3.15x102 [W/m/deg], SUS301: 1.6x10 [W/m/deg]