TEMPus VoLA: The timed Epstein multi-pressure vessel at low accelerations

Area of Science:

• Planetary Science
• Fluid Dynamics
• Astrophysics

Background:

• Planetary system formation depends on gas-dust aerodynamics in protoplanetary disks.
• Understanding dust clumping and planetesimal formation requires studying particle-gas interactions.

Purpose of the Study:

• Introduce and validate the timed Epstein multi-pressure vessel for micro-gravity experiments.
• Investigate collective dust particle aerodynamics under space-like conditions.
• Explore novel parameter spaces for dust dynamics relevant to planet formation and cometary dust emission.

Main Methods:

• Utilized a timed Epstein multi-pressure vessel under low acceleration and micro-gravity.
• Conducted three experiments focusing on pressure gradients, drag coefficients, and shear flow turbulence.
• Accessed unexplored parameter spaces for dust particle packing fraction, Knudsen, Stokes, and Reynolds numbers.

Main Results:

• Demonstrated the performance of the experimental facility through multiple flight campaigns.
• Collected data on collective particle-gas interaction, dust aggregate drag, and dust-induced turbulence.
• Established a foundation for testing models of dust aerodynamics in space-like environments.

Conclusions:

• The experimental facility is validated and ready for further campaigns to cover a wide parameter space.
• The study provides a comprehensive framework for testing models of collective dust particle aerodynamics.
• Findings are relevant for understanding planet formation and dust emission from cometary surfaces, aiding interpretation of Rosetta and preparation for Comet Interceptor missions.