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Example 4: Block Containing Heating Element (Transient Analysis)

The model is the same as the example 3: A heating element is placed in a block; the ambient temperature is constant. This is a transient analysis.
The temperature distribution and the heat flux vectors are solved under the transient condition.
Unless specified in the list below, the default conditions will be applied.

The transient analysis tab is set up as follows. The number of calculation steps is 120. The timestep is 2 sec.

Therefore, the temperature distributions for 240 sec are solved.

Tabs

Setting Item

Settings

Transient Analysis

Table

Number	Calculation Steps	Output Interval	Timestep [s]
1	120	10	2.0

Initial Temperature

0 [deg]

The same as the example 3. The body attributes, the material properties and the boundary conditions are the same as well.

A cylindrical heating element (Nichrome) is placed in the center of a glass-epoxy block.

The heat source is set in the body attribute. The ambient temperature is set to 0 [deg] in the external boundary condition.

* Available from the material DB

The heat source of VOL2 is set up as follows.

Body Attribute Name	Tab	Settings
VOL2	Heat Source	10 [W]

Boundary Condition Name/Topology	Tab	Boundary Condition Type	Settings
Outer Boundary Condition	Heat	Temperature	0 [deg]

To set Outer Boundary Condition, go to the [Model] tab

and click [Outer Boundary Condition] .

A cross section's temperature distributions in 40 sec, 160 sec and 240 sec are shown below.