[Intro]
Under pressure
(Sucked into the low-pressure zone)
Going down
(Spinning round)
I know I’m not alone!
[Verse 1]
The suction effect
Of a rotational vortex
I’ve come to see…
(Has more to do with gravity)
[Chorus]
Under pressure
(Sucked into the low-pressure zone)
Going down
(Spinning round)
I know I’m not alone!
[Bridge]
(Suck, suck) Suction
Getting sucked in
(Suck, suck) Suction
Better learn to swim
[Verse 2]
The suction effect
Down the drain (till not remains)
Pressure vortex
(Form an air core, till there’s no more)
[Chorus]
Under pressure
(Sucked into the low-pressure zone)
Going down
(Spinning round)
I know I’m not alone!
[Bridge]
(Suck, suck) Suction
Getting sucked in
(Suck, suck) Suction
Better learn to swim
[Chorus]
Under pressure
(Sucked into the low-pressure zone)
Going down
(Spinning round)
I know I’m not alone!
[Outro]
Form an air core
(Till there’s no more)
A SCIENCE NOTE
Water spiraling down a drain creates a rotational vortex, and this motion does contribute to the suction effect observed during drainage. However, the suction is primarily caused by gravity and the pressure difference between the water at the drain opening and the air above it. Here’s how the components work together:
1. Gravity and Pressure Difference:
- Gravity pulls the water down through the drain.
- As water flows out, it leaves a lower pressure area above the drain, which creates suction that helps draw more water toward it.
2. Rotational Vortex and Angular Momentum:
- The spiral motion of the water, a result of angular momentum, helps channel the water efficiently into the drain.
- Angular momentum is conserved, meaning that as water approaches the drain (a narrower space), it spins faster, creating a more pronounced vortex.
3. Role of Suction:
- The vortex facilitates the downward motion of water, reducing turbulence and creating a smoother flow.
- Suction draws air or water into the low-pressure zone created by the draining liquid, often forming an air core (a hollow center) within the vortex.
Misconception about Coriolis Effect:
It’s often mistakenly believed that the Coriolis effect (caused by Earth’s rotation) determines the direction of the vortex (clockwise or counterclockwise). In reality, the Coriolis effect is too weak to influence small-scale systems like a drain; the vortex direction is determined by the initial conditions of water flow and the shape of the container.