Agnirva Space Premier League - Expedition #31675: Exploring Liquid Dynamics in Space: How Rotation Affects Particle Behavior

On Earth, we take gravity for granted when studying fluids. But in microgravity, liquids behave very differently, presenting new opportunities to understand fundamental physics. The NanoRacks-San Diego Science Alliance Youth Space Institute conducted a pioneering experiment aboard the ISS to examine how liquid bridges deform and particles move under mechanical rotation in microgravity.

This experiment delves into the physics of fluid dynamics without the influence of Earth's gravity. A “liquid bridge” refers to a suspended column of liquid between two surfaces. Under rotation, this liquid bridge behaves uniquely in space, and analyzing its deformation provides insights into capillary action, surface tension, and interfacial phenomena.

The team studied particle motion within these liquid bridges to understand how mechanical rotation affects particle distribution and movement. In space, such knowledge can improve fluid handling in spacecraft systems—from fuel transfer to water purification processes.

By observing these effects in microgravity, the researchers aimed to refine theoretical models and potentially improve material design and engineering systems on Earth and in orbit. The experiment setup involved rotating syringes or chambers containing a fluid and particles, capturing data through imaging sensors.

What’s especially exciting about this project is its educational nature. It was conceived, designed, and supported by a youth space institute, giving high school students a chance to work on a real spaceflight experiment. The experiment encourages problem-solving, hypothesis testing, and collaboration across disciplines.

In essence, this project is a gateway into understanding how we can manipulate fluids for future space missions, including habitats, manufacturing processes, and life-support systems. It stands as a testament to how student-led research can produce high-value insights for science and engineering.

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