Discussion Forum

Probably. The definition that you gave is listed explicitly for the stationary case. And, since you are using the ec module, you probably aren't interested in modeling other possible thermal losses that could arise due to high-frequency effects (like bulk dielectric microwave heating), right?

Dear Robert sir, Thanks for your reply. Yes, my application involves operation only at the power frequency(50Hz). My main concern is that, since the defintion of Qe is not explicitly defined under the Electromagnetic heating multiphysics node for the time dependent study, how to be sure whether the dielectric loss has been included in the heat transfer equation ? or do I have to separately add a heat source node to the heat transfer(ht) physics interface defining it as the product (ec.normJ*ec.normE) to implement dielectric heating to my model ?

I don't know. But you could always compare a frequency-domain solution to a time-domain one, where the latter is modeled with an equivalent (sinusoidal) function of time. The same physics should give the same answers, and that should settle the matter. Also, I wouldn't expect a lot of dielectric heating at 50 Hz. But then, I really don't know what you are modeling. I suggest you post your model to the forum so that the Comsol community can offer more specific advice & suggestions.