I respectfully disagree with my learned and eloquent colleague.
A vacuum can only exist in a sealed chamber. By definition, it is the lack of or drastic reduction of barometric pressure.
Therefore, there is no possibility that any form of vacuum can exist in a coil chamber since it is open to barometric pressure at both ends. Further, while Bernoulli’s theorem does state that fluid draining out of a sealed tank can create a vacuum within the tank, much the same as turning a bottle of water upside down rapidly and the water not being able to flow out until an air bubble works it's way past the fluid, re-equalizing the barometric pressure, those air bubbles that you see in your juice are also re-equalizing the barometric pressure in the tank, hence, no vacuum.
In researching this argument, I did note some who use the phrase "vacuum EFFECT" in regard to how atomizer tanks work. None, however, state that an actual vacuum is being created. In actuality, a siphoning or scavenging effect is what is occurring. What little "vacuum" is created in the tank by drawing SCAVENGING air through the coil is quickly eliminated by the reverse barometric pressure as soon as the draw stops (The little air bubbles that float to the top of your tank through the fluid.). The wick is exactly that, a wick, and works the same as any wick, whether it be an oil lamp wick, a candle wick or an atomizer wick. Once it is saturated it transfers the "juice" by means of capillary action. The draw and intensity of draw do have a SCAVENGING or SIPHONING effect on the fluid and will draw more fluid into the wicking material but, as stated previously, wicking material is porous and will allow the existing barometric pressure to quickly equalize any "vacuum" temporarily created in the tank. Furthermore, the relatively small volume of fluids in the tanks (2 ml. to 7 ml.) would not be sufficient for specific gravity to flood any but the most loosely packed heads.
There is no doubt in my mind that flooding can only occur in an improperly packed coil chamber. I also have no doubt that there is a "sweet spot" in regard to how firmly the wicking material is packed and that WILL take some practice and experience. Lack of experience can not contradict the laws of physics, however.
Respectfully,

Von Vape