Abstract
This article concerns granular shearing flows in microgravity where segregation of grains by size or mass is driven by spatial gradients in the fluctuation energy of the grains.
Experiments were conducted on NASA’s microgravity aircraft with a shear cell shaped like a race track and containing a mixture of two types of spherical grains. A gradient of fluctuation energy was produced between the inner, energetic moving boundary driving collisions among the grains and the outer, more dissipative boundary at the periphery of the cell. The energetics were achieved by covering the two boundaries with bumps of appropriate size and spacing and by setting the distance between the flat side walls through which the flow was observed.
The grain segregation and the corresponding velocity statistics were captured by a high-speed video camera and analyzed using computer vision software. The resulting profiles of particle mean and fluctuation velocities were compared with computer simulations of the entire experimental apparatus.
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© 2000 Springer Science+Business Media Dordrecht
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Louge, M.Y., Jenkins, J.T., Reeves, A., Keast, S. (2000). Microgravity Segregation in Collisional Granular Shearing Flows. In: Rosato, A.D., Blackmore, D.L. (eds) IUTAM Symposium on Segregation in Granular Flows. Solid Mechanics and Its Applications, vol 81. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9498-1_9
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DOI: https://doi.org/10.1007/978-94-015-9498-1_9
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