Example4 Block Containing Heating Element(Transient Analysis)

General

• The model is the same as Exercise 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.
   

Analysis Space

Analysis Conditions

The transient analysis is set up as follows. The total number of steps is 120. The time step is 2 second.

Therefore, the temperature distributions for 240 seconds are solved.

Model

The same as Exercise 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.

Body Attributes and Materials

* Available from the Material DB

The heat source of VOL2 is set up as follows.

Boundary Conditions

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

and click [Outer Boundary Condition] .

Results

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

In 40 seconds

In 120 seconds

In 240 seconds

The temperature vs. time is plotted for the center of the heating element.

The temperature is stabilizing at around 250 deg in 240 sec.