Guilin Sun
Ansys Employee

The modeling and simulation methodology are the same as the online example. You will need to do FDTD simulation first, and then import the absorbed power into HEAT.

For transient HEAT simulation, you just choose the "transient" instead of "Steady state". Please refert the examples:

Thermal-Conductive and Transient Simulations - Transient Simulation Settings

Please try and let me know if you have questions.