Threshold of gas-like to clustering transition in driven granular media in low-gravity environment

Noirhomme, Martial; Cazaubiel, Annette; Darras, Alexis; Falcon, Éric; Fischer, David G.; Garrabos, Yves; Lecoutre-Chabot, Carole; Merminod, Simon; Opsomer, Eric; Palencia, Fabien; Schockmel, Julien; Stannarius, Ralf; Vandewalle, Nicolas

doi:10.1209/0295-5075/123/14003

Cited by 18 publications

(33 citation statements)

References 38 publications

(39 reference statements)

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“…Indeed, the simplicity of microgravity systems makes them ideal for investigating various non-classical behaviours exhibited by granular gases [26,27], in particular their well-known non-Gaussian velocity distributions [28,29]. More recently, significant interest has developed in the study of the phase transitions of vibrated dry granular media in microgravity [30][31][32][33][34], and it is one such transition which forms the focus of the present work.…”

Section: Vibrated Granular Systems In Microgravitymentioning

confidence: 97%

Granular dampers in microgravity: sharp transition between modes of operation

et al. 2020

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When a container filled with granular material is subjected to sinusoidal vibration in microgravity, dependent on the amplitude of the oscillation, the granulate may exhibit one of two distinct dynamical modes: at low amplitude, a gas-like state is observed, where the particles are relatively homogeneously distributed within the container, almost independent of the phase of the oscillation. In contrast, for large amplitude, collective motion of the particles is favoured, termed collect-andcollide regime. Both regimes are characterized by very different dissipation characteristics. A recent model predicts that the regimes are separated by a sharp transition due to a critical amplitude of the vibration. Here we confirm this prediction of a sharp transition and also the numerical value of the critical amplitude by means of experiments performed under conditions of weightlessness.

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Section: Vibrated Granular Systems In Microgravitymentioning

confidence: 97%

Granular dampers in microgravity: sharp transition between modes of operation

et al. 2020

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“…The latter changed by moving the top wall. Noirhomme et al 17 give a phase diagram for whether such clusters should occur or the system is a granular gas. This depends on the packing fraction and the system size.…”

Section: Cluster Formation and Meltingmentioning

confidence: 99%

ARISE: A granular matter experiment on the International Space Station

Steinpilz

Musiolik

Kruss

et al. 2019

Review of Scientific Instruments

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We developed an experiment to study different aspects of granular matter under microgravity. The 1.5U small experiment was carried out on the International Space Station. About 3500 almost identical spherical glass particles with 856 µm diameter were placed in a container of 50 by 50 mm cross section. Adjusting the height between 5 and 50 mm, the filling factor can be varied. The sample was vibrated with different frequencies and amplitudes. The majority of the data are video images of the particles' motion. Here, we give a first overview of the general setup and a first qualitative account of different phenomena observed in about 700 experiment runs. These phenomena include collisional cooling, collective motion via gas-cluster coupling, and the influence of electrostatic forces on particle-particle interactions.

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“…Refs. Opsomer et al (2011), Sack et al (2013), Noirhomme et al (2018), and Aumaitre et al (2018). In the regime where particle-particle collisions dominate over particle-wall collisions (beyond the Knudsen regime), i. e. at sufficiently high particle number densities, the projected images of spherical grains heavily overlap.…”

Section: Introductionmentioning

confidence: 99%

Machine Learning for 3D Particle Tracking in Granular Gases

Puzyrev

Harth

Trittel

et al. 2020

Microgravity Sci. Technol.

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Dilute ensembles of granular matter (so-called granular gases) are nonlinear systems which exhibit fascinating dynamical behavior far from equilibrium, including non-Gaussian distributions of velocities and rotational velocities, clustering, and violation of energy equipartition. In order to understand their dynamic properties, microgravity experiments were performed in suborbital flights and drop tower experiments. Up to now, the experimental images were evaluated mostly manually. Here, we introduce an approach for automatic 3D tracking of positions and orientations of rod-like particles in a dilute ensemble, based on two-view video data analysis. A two-dimensional (2D) localization of particles is performed using a Mask R-CNN neural network trained on a custom data set. The problem of 3D matching of the particles is solved by minimization of the total reprojection error, and finally, particle trajectories are tracked so that ensemble statistics are extracted. Depending on the required accuracy, the software can work fully self-sustainingly or serve as a base for subsequent manual corrections. The approach can be extended to other 3D and 2D particle tracking problems.

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Threshold of gas-like to clustering transition in driven granular media in low-gravity environment

Cited by 18 publications

References 38 publications

Granular dampers in microgravity: sharp transition between modes of operation

Granular dampers in microgravity: sharp transition between modes of operation

ARISE: A granular matter experiment on the International Space Station

Machine Learning for 3D Particle Tracking in Granular Gases

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