Controlled Heat Flow Rate Source
R2026bVariable source of thermal energy, characterized by heat flow
Controlled Heat Flow Rate Source block
To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.
Libraries:
Simscape /
Foundation Library /
Thermal /
Thermal Sources
Description
The Controlled Heat Flow Rate Source block represents an ideal source of thermal energy that is powerful enough to maintain specified heat flow at its outlet regardless of the temperature difference across the source.
Connections A and B are thermal conserving ports corresponding to the source inlet and outlet, respectively. Port S is a physical signal port, through which the control signal that drives the source is applied. You can use the entire variety of Simulink® signal sources to generate the desired heat flow variation profile. The heat flow through the source is directly proportional to the signal at the control port S.
The block positive direction is from port A to port B. This means that positive signal at port S generates heat flow in the direction from A to B.
Examples
Heat Conduction Through Iron Rod
How thermal blocks can model a long iron rod that is fixed to a hot base at one end and exposed to air along its length and at its free end. The rod is an extended surface that undergoes conduction along its length and convection with air in the direction perpendicular to its length. Extended surfaces are often used as fins to cool a solid.
Ports
Input
Conserving
Programmatic Use: Add Block
To add the block programmatically, use the add_block function with one of these library block paths as the source.
"fl_lib/Thermal/Thermal Sources/Controlled Heat Flow Rate Source"
Example: add_block("fl_lib/Thermal/Thermal Sources/Controlled Heat Flow Rate Source","myModel/myBlock",MakeNameUnique="on")
For information about programmatic access to individual block parameters, see the Programmatic Use section of parameter descriptions on this page.
Extended Capabilities
Version History
Introduced in R2007b
