Asian Try Zero-G 2022 Experimental Theme Finalized

When the granular gas is left unattended, it loses energy due to collisions between particles, and the particles gradually aggregate to form clusters. The experiment reproduces this with copper beads.

The " dumbbell-shaped" rotating body can rotate along a horizontal axis around a vertical axis, and has only two main moments of inertia, so rotation along the main axis is stable and the Dzhanibekov effect* is not expected to occur. We will verify this using two rigid bodies whose centers of gravity are known to be different. ( Previously, a video of this effect has been reproduced using pliers, but this is the first comparative verification.)
Dzhanibekov effect: A phenomenon in which the direction of rotation reverses 180 degrees when the axis of rotation is kept constant for a while, and then rotates 180 degrees back to the original direction again after another while.

The double pendulum is known to exhibit unpredictable motion on earth due to its increased degrees of freedom and is a classic case of chaos. In a microgravity environment, we will observe how the double pendulum exhibits more disordered behavior when a force is applied to specific positions of the double pendulum (at the joints, at the middle of the second section, and at the end points).

On the ground, when water in a bottle is rotated, a water vortex occurs; verify whether a water vortex occurs in a microgravity environment where there is no downward force and how the water in the rotating body behaves.
Predict that if a cylindrical bottle is rotated in a microgravity environment with its longitudinal axis, only centrifugal force will be present after the rotation, and the water will stick to the sides of the bottle, resulting in a hollow state. Predict that if the cylindrical shape is rotated on a different axis, the water will collect in the center of the bottle. Also, observe the movement after the rotation stops.

The water sphere in a microgravity environment becomes perfectly spherical as the effect of surface tension becomes more pronounced. Two experiments will be conducted on this water sphere to observe the state of the water sphere. In the first experiment, the kinetic energy is changed by using two spherical rigid bodies (balls) of different masses, and the state of the water and rigid bodies is observed when they collide with the water sphere that forms a spherical shape due to surface tension. In the second experiment, a rigid body (frame) with angular velocity is brought into contact with a water ball forming a sphere, and the state of the frame and the water ball is observed.

Capillary action in a microgravity environment is verified by measuring height. The height caused by capillary action is considered to depend on parameters such as the density of the liquid (𝜌𝜌), surface tension (T), radius of the tube (r), contact angle (𝜃𝜃), and standard acceleration due to gravity (g) In a microgravity environment, where the effect of gravity is much less than on the ground, it is estimated to be 1.11 times higher than the height of the earth. We will verify the reasonableness of this estimate using microcapillaries of different diameters and straws.