Séminaire IPAG

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Exploring Cosmic Dust Dynamics in Weightlessness

jeudi 2 mai 2024 - 11h00

Holly Capelo - Université de Berne
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Understanding the intricate dynamics of gas-dust interactions within protoplanetary disks is crucial for unraveling the mysteries of planetary system formation. This seminar introduces TEMPus VoLA, an experimental setup designed to investigate particle dynamics and rarefied gas behavior in microgravity. Through three dedicated experiments, we explore the effects of collective particle-gas interaction on pressure gradients, drag coefficients of dust aggregates, and the onset of turbulence in shear flows. Our findings, gleaned from multiple parabolic flight campaigns, reveal modifications in drag coefficients for permeable dust aggregates and unexpected flow phenomena occurring at lower Reynolds numbers than predicted by classical fluid dynamics. These insights not only shed light on turbulence generation in proto-planetary discs but also have implications for understanding phenomena like dust emission from cometary nuclei. The presented framework offers a valuable tool for validating models and numerical simulations of collective dust particle aerodynamics under space-like conditions.

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Hôtes : Greta Guidi

Salle Manuel Forestini, 414 rue de la piscine, 38400 Saint Martin d'Hères