| Full text | |
| Author(s): |
Total Authors: 3
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| Affiliation: | [1] Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 - USA
[2] Univ Estadual Campinas, Sch Mech Engn, UNICAMP, Rua Mendeleyev 200, Campinas, SP - Brazil
Total Affiliations: 2
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| Document type: | Journal article |
| Source: | Physics of Fluids; v. 33, n. 5 MAY 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Barchans are dunes of crescentic shape found on Earth, Mars, and other celestial bodies, growing usually on polydisperse granular beds. In this Letter, we investigate experimentally the growth of subaqueous barchans consisting of bidisperse grains. We found that the grain distribution within the dune changes with the employed pair, and that a transient stripe appears on the dune surface. We propose that observed patterns result from the competition between fluid entrainment and easiness of rolling for each grain type, and that grains segregate with a diffusion-like mechanism. Our results provide new insights into barchan structures found in other environments. (AU) | |
| FAPESP's process: | 18/14981-7 - Modeling of dense granular flows: experiments, numerical simulations and stability analyses |
| Grantee: | Erick de Moraes Franklin |
| Support Opportunities: | Research Grants - Young Investigators Grants - Phase 2 |
| FAPESP's process: | 16/18189-0 - Liquid-fluidized beds in narrow pipes: dynamics and instabilities |
| Grantee: | Fernando David Cúñez Benalcázar |
| Support Opportunities: | Scholarships in Brazil - Doctorate |