Hello
I have read the description carefully and carefully, and then what you want.
I have a good experiences in engineering optimisation based on thermal simulation.
I will provide thermal performance of the package when materials of the housing and interface are changed.
I can consider all possibility. I will make the response surface of the thermal performance depending material properties, using DOE like LHS, Monte Carlo or other method.
And then, I will get finally optimal combination using Optimisation. I can use a multi-object function for thermal performance.
So, you can choose the exact optimal design.
I would love to contact for our work.
Thank you.
Zhang