DIY Air Conditioner
HOAIZIN
As the fluid velocity increases, according to fluid dynamics effects, its static pressure decreases. This explains why fluid entering a smaller aperture from a larger one experiences a decrease in temperature: as fluid velocity increases, its pressure energy decreases, thus reducing static pressure and resulting in a perceived cooling effect.
HOAIZIN
Therefore, the phenomenon described, where air flows in from a larger aperture to a smaller one and the temperature drops, can be explained by Bernoulli’s principle. Here, the fluid’s pressure energy converts to kinetic energy during flow, leading to a decrease in static pressure and thus a cooling effect observed in temperature perception.

