Lately I've become rather obsessed with physics and in particular the casimir effect. I understand how it works, though I recently began wondering how this effect would act within a circular or a cylinder or something as such. Would it make the circle cave in, thus the sides touching? Would the circle remain round? I cannot find many articles about this question, and although I do assume that the circle would simply cave in onto itself I still find this quite interesting and do seek other, more professional, eyes. Thank you.