Heat Flux
The Heat Flux PropertyManager lets you apply heat flux to the selected faces. Heat flux is used in thermal studies only. For steady state thermal studies, you can define temperature-dependent heat flux. For transient thermal studies, you can define time- or temperature-dependent heat flux, and a thermostat to control the heat flux.
To define Heat Flux:
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Do one of the following:
In the Simulation study tree, right-click Thermal Loads
and select Heat Flux
.
-or-
Click Simulation, Loads/Fixture, Heat Flux
-or-
Click Thermal Loads, Heat Flux 
(Simulation toolbar).
The Heat Flux PropertyManager appears.
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In the graphics area, select the desired faces.
To select all faces exposed to outside at once, click Select all exposed faces. To delete a face, right-click the face and select Delete. See Selecting All Exposed Faces for details.
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Under Heat Flux, do the following:
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Set Units 
to the desired unit system.
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Type a value for the Heat Flux in the selected unit system.
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To define a time-dependent heat flux, click Use Time Curve 
then click Edit to
import or define a time curve
. The value of the heat flux at any time instant is calculated by multiplying the specified heat flux value by the corresponding Y value of the time curve. This option is available for transient thermal studies only.
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To define a temperature-dependent heat flux, click Use Temperature Curve 
then click Edit to
import or define a temperature curve
. The value of the heat flux at a given temperature is calculated by multiplying the specified heat flux value by the corresponding Y value of the temperature curve.
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To control the heat flux condition by a thermostat, do the following:
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Click Thermostat (Transient).
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Select a vertex for the location of the thermostat.
Make sure to first click in the Sensor (select a vertex) box before selecting a vertex for the sensor. Otherwise, the selected vertex appears in the Selected entities box.
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Select the unit for the Lower bound temperature 
and type the desired value in the value box.
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Select the unit for the Upper bound temperature and type the desired value in the value box.
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Click 
.
To modify heat flux loads:
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In the Simulation study tree, right-click the heat flux load you want to modify and click Edit Definition, or double-click the heat flux load.
The Heat Flux PropertyManager appears.
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Make the desired changes.
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Click .
TIPS:
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If you have multiple studies, you can drag and drop the loads from one study to another. You can also drag and drop the whole Thermal Loads folder.
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You can modify the default names of the load icons. This helps you keep track of the different loads applied to the model.
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You have an option to hide or show the individual loads. In the Simulation study tree, right-click the respective load icon and then click Hide/Show.
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To change the color of the heat flux symbol, click the Color button in the Heat Flux PropertyManager. The color palette opens. Select the desired color and click the OK button.
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Selected entities box lists the number of faces to which the specified heat flux is to be applied.
Click here for a summary of applying thermal loads and restraints.