Learning Forum

[yogesh.babu]

Hello,

1. Is there a way to implement a time-dependent variation, specifically a sine variation, on top of the EM losses computed from HFSS, while running an electrothermal simulation in Ansys Icepak AEDT? 

2. Is it correct to include an expression of a sine function like sin(2*pi*f*Time), with f = 217 Hz, directly in the loss multiplier field?

I tried a few simulation trials, but I was not successful in getting a meaningful result. A brief explanation of my simulation workflow: 

1. I model a simple microstrip line in HFSS. Compute the dielectric (substrate) losses using the fields calculator. The dielectric losses are 0.99 mW at 5 GHz when 1 W power is given as input at the port. 
2. I insert an Icepak design (transient problem type) within the same project and copy the model from HFSS to Icepak with thermal properties included.
3. Assign an EM loss Boundary Condition (BC) to the dielectric. A link between HFSS & Icepak is created. In the loss multiplier field, I add a sine function as shown in the screenshot below.

    4. I add a monitor point on the top surface of the dielectric to check the temperature rise over time. 

    5. Create a solution setup, generate mesh, and run the simulation. Simulation runs from 0s to 23ms in time steps of 0.18ms. The resulting temperature over time is shown below.

A screenshot of the full model is shown for your reference. I use Ansys version 2024 R1. Any inputs on this are highly appreciated.

 

 

Thanks,

Yogesh