To Define Heat Loads
1. Click
Home >
Heat. The
Heat Load dialog box opens.
2. Type a name for the heat load or accept the default name.
3. Select an existing load set from the
Member of Set list or click
New to create a new
load set.
4. Select the type of reference from the References list.
5. Select the geometric entities as references.
6. Depending on the type of entity you selected, provide information for one or both of the following items in the Heat (Q) area:
◦ Spatial Variation—Varies the load uniformly, as a function of coordinates, or as a function of arc length. When you select
Function of Coordinates or
Function of Arc Length from the drop-down list, the
button appears along with a list of functions defined in the model.
Select a function from the list, or click
to display the
Functions dialog box to define or edit a function.
◦ Temporal Variation—Creates a time-dependent heat load. Select the
Time Dependent option from the drop-down list and click
. The
Function Definition dialog box opens. The
Temporal Variation option is not available in FEM mode.
7. To combine spatial and temporal variations, select the
Combine Spatial and Temporal Functions check box. Click
to open the
Function Definition dialog box to define or edit a single function for the spatial and temporal variation of the load.
|  The Combine Spatial and Temporal Functions check box is available only if you set Spatial Variation to Function of Coordinates or Function of Arc Length and Temporal Variation to Function of Time. |
8. Type a value for the
heat transfer rate in the
Value box. Select the
units from the drop-down list or accept the default unit.
9. Click Preview to preview the defined heat load.
| If you have selected the Combine Spatial and Temporal Functions check box, the Preview Time dialog box opens when you click Preview. Type a non-negative value for time in the Time box. Select the units from the drop-down list or accept the default unit. |
10. Click OK.
The loads are applied to all the specified entities and a
heat load icon is added to the geometry that you are loading.