Boundary Conditions in HEAT - Simulation Object

wzy2020wzy2020 Member Posts: 1


I tried to follow following example for simulating my structure:

I want to calculate the temperature rise of two silicon disks with different diameters and heights of 60nm,The figure above is my FDTD modeling

The figure above is my HEAT modeling,My substrate is sio2,The boundary conditions of glass and air are convection, and the boundary conditions of Si and air are convection。In the example, the substrate is Al2O3, au is on the substrate, and no boundary conditions are set between the two interfaces. In my design, I want to know how to set the boundary conditions of Si and sio2.? Or no boundary conditions are set as in the example

Best Answer

  • kghaffarikghaffari Posts: 80Ansys Employee
    Accepted Answer


    Good question. Here the boundary conditions between Air and the other solids represent the convection cooling through the fluid. This doesn't apply to the Si and SiO2 interface. In general convection and temperature are two of the more commonly used boundary conditions in HEAT (both are used in the mentioned example). When setting up the boundary conditions for your simulation, I always advise referring to your understanding of your structure’s heat dynamics or any references you might have for a similar structure. Given your description, the structure seems similar to the one published in the example, so using convection and temperature for substrate should be a good starting point.

    Best regards


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