Discussion Forum

Can someone help me understand why even though I tell all my study steps under one study to use only a single physics interface the solver still tries to find dependent values for variables under the other unselected physics interfaces?

Specifically I have a model with two components. These components are actually not meant to be linked in any way, they are simply included in the same model so that I can export their results together into a single report. I understand this makes things confusing for COMSOL since it likes to couple everything but it's much easier for me to do this as long as I understand how the solvers and solutions work. And it looks like I don't.

My first component only uses the "magnetic fields (mf)" interface. My second component uses "Pressure Acoustics, Frequency Domain (acpr)" and "Electrical Circuit (cir)". In my first study step I only do a small signal analysis (stationary and freq-domain, perturbation). For both steps I only select the "mf" physics interface, but for some reason when I expand down to "Solution 1" and it's "Dependent Variables 1" I am seeing variables for "acpr" and "cir". This ends up giving me unexpected, unwanted, and empty solutions in the results.

Any idea if I'm doing something wrong, and if so, what I could be doing wrong? Is there any way I can better isolate the components from each other in the study steps, solvers, and solutions?

Thanks in advance for any help.

EDIT: Figure this out myself. I found I need to edit the physics tree and completely disable the specific physics to prevent this from happening. I'm not sure why just not selecting them in the standard physics selection menu doesn't do the job, but at least I figured out how to get it done.