This doubt is about a conundrum which is common to multiple scenarios. One such scenario is this:
The valve is opened and the high pressure air is pushed towards the water in the channel with the hope that it will drive out all the water through the open end of the channel. Now, my doubt is whether air will drive out all the water or will it simply pass through the water as bubbles?
The scenario occurs in many other situations. In aquariums, the pump pushes in air which passes through as bubbles. In pressure-based cleaning devices (e.g. vacuum cleaners), air pressure drives out all other fluids.
So what happens in this case? And how do we even analyze such problems. In which cases does the air drive out the fluid and in which cases does it pass through as bubbles?