Cartesian diver moving sideways

Let's take a look!

What type of experiment is this?

Experimental procedure and explanation:

• We apply the previously published Cartesian diver to create a floater that moves horizontally.
• As in the previous Cartesian diver, it is created using a dropper and nut (weight). Additionally, it has a fin attached to ensure horizontal movement. As the floater moves up and down, the fins bend the flow around it and generate lateral force.
• Therefore, when the float moves up and down, it also moves sideways.
• The relationship between the changes in the direction of flow and the force acting on it can be explained by momentum theory. However, this is beyond the scope of the current experiment, and can be learned at college (fluid mechanics).
• This experimental video was produced with the support of JSPS Grant-in-Aid for Scientific Research 18K03956.

[Keywords]	Buoyancy, Cartesian diver, momentum theory
[Related items]	Cartesian diver
[Reference]	Ryozo Ishiwata, "The Wonder of Flow," Kodansha Blue Backs, p. 42-47.

◀　Back Next　▶