When I turned the water on to shower today, the shower curtain kept sticking to me. I wondered why this happened, and found out that there a few explanations for it. When the showered is turned on, and the fluid accelerated, the pressure around it drops. Meanwhile, the pressure outside the shower curtain remains the same. This pressure gradient makes the curtain move inwards.
Another explanation is that when the shower sprays, the air inside turns into a vortex, and the pressure at the center of this vortex has a lower pressure, like the eye of a hurricane. This low pressure could be what sucks the curtain inwards.
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