Learning Forum

[talimu]

Hi support team,In your example Thermally tuned waveguide (FEEM) you add a convection boundary condition that models convective heat transfer between a solid and a gas.nCan you please explain why this convection boundary condition is applied only on the interface between solid and air? and not the interference between Silicon and Oxide for example?nIn this example, we have 2 solvers:HEAT and FEEM. When I run FEEM, HEAT would run automatically prior to FEEM, or HEAT needs to be run separately prior to FEEM ?nThanks, nTalinn

[GWANG]

Hi talimu,nnRegarding your questions:nConvectional transfer of heat is happened when solid surface meets fluid like air. Here are some details of the boundaries:https://support.lumerical.com/hc/en-us/articles/360034398314-Boundary-Conditions-in-HEAT-Simulation-ObjectnThe heat transport (HEAT) solver is first used to simulate the temperature profile for the waveguide with different input powers. This result is then imported into the Finite-Element Eigenmode (FEEM) solver to characterize the optical response, including changes to the effective index, phase and loss as a function of the input power. They run separately. n

[talimu]

Hi GWANG ,nThanks!n

[talimu]

Hi GWANG ,nThank you for your reply. I have some following questions.n1)     Can you please explain why in this example- Thermally tuned waveguide (FEEM)", PEC boundary conditions is applied at the surface of FEEM simulation region? n

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