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# Example4Block 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

 Item Settings Analysis Space 3D Model unit mm

### Analysis Conditions

 Item Settings Solver Thermal Analysis [Watt] Analysis Type Transient analysis Options N/A

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.

Tabs

Setting Item

Settings

Transient analysis

Table

 Number Calculation steps Output steps Time step [s] 1 120 10 2.0

Initial Temperature

0[deg]

### 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

 Body Number/Type Body Attribute Name Material Name Mesh Size 0/Solid VOL1 006_Glass_epoxy * 1/Solid VOL2 109_Nichrome * 2

* 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 Conditions

 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] .

### Results

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

##### 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.

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