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Water flower

Let's take a look!

What type of experiment is this?

Experimental procedure and explanation:

  • When water is applied to a cup with 5 notches, a film of water is formed in the shape of a cherry blossom. This is because the water film breaks at the notches.
  • When water is applied to a cut bottom of a plastic bottle, water rises like a fountain at five locations.
  • In this way, the shape of water changes depending on each shape. Various shapes can be created by balancing the function of "inertia" that flows out along the surface of an object and the function of "surface tension," which attempts to reduce the size of the water film. You can experiment with a variety of things.
  • Be careful not to cut your hand when cutting plastic bottles, etc.
  • Water is an important resource. Be careful not to waste water.
[Keywords] Inertia, surface tension
[Related items] Make a film of water, Cut the water film
[Reference] “The Wonders of Flow,” Japan Society of Mechanical Engineering, Kodansha Blue Backs, P15, P62-67
“Illustrated Fluid Dynamics Trivia,” by Ryozo Ishiwata, Natsume Publishing, P208-209, P48-49

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Last Update:3.1.2022