I'm using the Microwave Heating (mh) physics, with a Frequency-stationary study. Temperature initial condition set to 293.15[K]. I have the model surrounded by thermal insulation, except for one part of the structure that is held at 293.15[K]. I inject 1Watt of microwave power and expect things to get warm, but they don't. They get colder!! Especially curious is the region I set to 293.15[K] appears to be at 253.88[K]. Why is this happening? Why don't I get the fixed temperature I set? Why is it almost 19 degrees colder? From what I can tell, this 19 degree offset is the same across the whole model.
When I do the transient study with exactly the same model, the initial temperature is a proper 293.15[K]. The fixed temperature region I set remains a proper 293.15[K], and as time progresses, the temperatures elsewhere rise as expected. The transient study works. The stationary seems to be all low by 19 degrees.
I've looked everywhere for an errant temperature setting. Is this a Comsol bug?
When I do the transient study with exactly the same model, the initial temperature is a proper 293.15[K]. The fixed temperature region I set remains a proper 293.15[K], and as time progresses, the temperatures elsewhere rise as expected. The transient study works. The stationary seems to be all low by 19 degrees.
I've looked everywhere for an errant temperature setting. Is this a Comsol bug?