Heat Source
Introduction
Model browser can be used to do a quick model set up for flow analysis. You can do this set up after creating a solution for flow analysis.Heat Source Parameters
The following parameters can be assigned for the flow analysis through model browser.

Heat Source: Total heat source value for flow analysis.
Material: The Material for a body can be assigned using this column.
You can use Heat Source Parameters ( Modeling window | Right Click on Bodies) tool to set all these parameters for more than bodies in one click.

Create Heat Source
This tool (Model Browser | Right Click on a Model / Sub Model / Bodies) is used to create heat source object for the flow analysis.
Note: The same option is also available in Right Click Options