StMarcos
Well-Known Member
Anaerobic fermentation occurs when there is no oxygen which is not the case with a stir plate. Cell production happens both during aerobic respiration and anaerobic fermentation. However it is much slower an less efficient during anaerobic fermentation.
http://woodlandbrew.blogspot.com/2013/03/yeast-propogation-with-aerobic.html
By "ferment dry" do you mean that a hydrometer measures 1.000 or less?
Once the fermentation is vigorous, I doubt very much that inward diffusion could keep up with the CO2 front.