NanoRacks-San Diego Science Alliance Youth Space Institute-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation (NanoRacks-SDSA YSI-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation) - 05.31.17

Overview | Description | Applications | Operations | Results | Publications | Imagery

ISS Science for Everyone

Science Objectives for Everyone
Fluid dynamics are different in space, where gravity and convection are lacking, yet the basic rules of physics still apply. NanoRacks-San Diego Science Alliance Youth Space Institute-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation (NanoRacks-SDSA YSI-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation) uses liquid droplets floating in microgravity to test Bernoulli’s principle of an inverse relationship between pressure and density, in which a fast-moving fluid exerts less pressure than a slow-moving one.
Science Results for Everyone
Information Pending

The following content was provided by Hilde N. Van den Bergh, BS Astronomy, MS Physics, and is maintained in a database by the ISS Program Science Office.
Experiment Details

OpNom: NanoRacks Module-22 S/N 1003

Principal Investigator(s)
San Diego Science Alliance Youth Space Institute , San Diego Science Alliance Youth Space Institute, San Diego, CA, United States

Co-Investigator(s)/Collaborator(s)
Hilde N. Van den Bergh, BS Astronomy, MS Physics, San Diego Science Alliance, San Diego, CA, United States

Developer(s)
San Diego Science Alliance Youth Space Institute, San Diego, CA, United States
NanoRacks LLC, Webster, TX, United States

Sponsoring Space Agency
National Aeronautics and Space Administration (NASA)

Sponsoring Organization
National Laboratory Education (NLE)

Research Benefits
Information Pending

ISS Expedition Duration
March 2015 - March 2016

Expeditions Assigned
43/44,45/46

Previous Missions
Information Pending

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Experiment Description

Research Overview

  • NanoRacks-San Diego Science Alliance Youth Space Institute-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation (NanoRacks-SDSA YSI-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation) is an investigation of the internal motion of liquid particles and the changes in the shape of a liquid bridge built between stationary and rotating disk-shaped plates.  
  • The purpose is to test the hypothesis that, in response to the rotation of one of the plates and its corresponding disruption of the water’s adhesion to the plate’s surface, water particles move toward the rotating plate due to the lower pressure area created from faster moving particles (Bernoulli’s Principle), thus narrowing the middle of the bridge.  
  • This narrowing of the liquid bridge increases proportionally to increases in angular speed.  
  • The particles in the liquid column near the rotating plate move in the direction of the rotating plate at a speed respective to the angular velocity and their distance from the rotating plate. The particles farther away from the moving base move slower relative to how far away from the base they are - the greater the distance, the slower the speed.
     

Description
NanoRacks-San Diego Science Alliance Youth Space Institute-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation (NanoRacks-SDSA YSI-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation) is an investigation of the internal motion of liquid particles and the changes in the shape of a liquid bridge built between stationary and rotating disk-shaped plates. The purpose is to test and understand fluid flow response (Bernoulli’s Principle). In the investigation a liquid bridge is formed by a mechanical distilled water dispenser. The dispenser creates a film of water between two plates, or disks. As one of the two plates is moved away and separated from the stationary plate, the water adheres to both plates forming a liquid bridge. The forces of adhesion and surface tension keep the liquid bridge intact.  Once the bridge is stable, a motor with gears spin the far plate using a ball-bearing system. Angular velocities of pi/32/s, pi/24/s, and pi/16/s, are tested. The water contains suspended solid particles that reveal the movement of the liquid particles in response to the rotation via photographs. All operations of the submodule are controlled by the payloads’ circuit board. The photographic data is taken during the formation of the column and during the rotation process with a circuit board mounted digital camera and LED lighting, to show the difference in shape of the bridge and the movement of the suspended solid particles.

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Applications

Space Applications

This investigation studies the changes in shape of a liquid “bridge” built between two plates, one of which is stationary and one of which is spinning. Experiments test the hypothesis that water droplets float toward the rotating plate as a result of a high-pressure area created by faster-moving droplets close to the plate. Results lead to a better understanding of fluid dynamics in microgravity.
 

Earth Applications
Students from San Diego Science Alliance Youth Space Institute conceived and designed this investigation, gaining experience in problem-solving and experimental design to prepare them for careers in science, technology, engineering and math (STEM) fields.

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Operations

Operational Requirements and Protocols

Data collection within the experiment is automated; downlink is done via scheduled STELLA/NanoRacks command window intervals for the NanoRacks Platform. Payload is ambient and soft-stowed, but late loaded (approximately L-72hr) and an early return.

Crew interaction with NanoRacks Module-22 is limited to transferring the NanoRacks Module from the launch vehicle to the ISS, installing the Module into a NanoRacks Platform, activating the NanoRacks Platform, data retrieval (as needed) during the mission, and destowing and returning the Module.

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Decadal Survey Recommendations

Information Pending

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Results/More Information

Information Pending

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Related Websites
NanoRacks
San Diego Science Alliance

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Imagery

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The NanoRacks-San Diego Science Alliance Youth Space Institute-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation (NanoRacks-SDSA YSI-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation) investigation team from San Diego, CA. Image courtesy of San Diego Science Alliance Youth Space Institute.

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Programming the NanoRacks-San Diego Science Alliance Youth Space Institute-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation (NanoRacks-SDSA YSI-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation) experiment. Image courtesy of San Diego Science Alliance Youth Space Institute.

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Assembling the experiment containment enclosure for the NanoRacks-San Diego Science Alliance Youth Space Institute-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation (NanoRacks-SDSA YSI-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation) investigation. Image courtesy of San Diego Science Alliance Youth Space Institute.

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Assembling the ground test unit for the NanoRacks-San Diego Science Alliance Youth Space Institute-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation (NanoRacks-SDSA YSI-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation) experiment. Image courtesy of San Diego Science Alliance Youth Space Institute.

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Assembling the ground test unit for he NanoRacks-San Diego Science Alliance Youth Space Institute-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation (NanoRacks-SDSA YSI-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation) investigation, CA. Image courtesy of San Diego Science Alliance Youth Space Institute.

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Fabricating the ground test unit in the mentor’s garage for the NanoRacks-San Diego Science Alliance Youth Space Institute-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation (NanoRacks-SDSA YSI-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation) investigation. Image courtesy of San Diego Science Alliance Youth Space Institute.

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Fabricating the experiment containment enclosure for the NanoRacks-San Diego Science Alliance Youth Space Institute-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation (NanoRacks-SDSA YSI-Liquid Bridge Deformation and Particle Motion Under Mechanical Rotation) investigation. Image courtesy of San Diego Science Alliance Youth Space Institute.

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