An experimental study of particle-driven gravity currents on steep slopes with entrainment of particles
| Autor: | M. Rastello, C. Ancey, F. Ousset, R. Magnard, E. J. Hopfinger |
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| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Natural Hazards and Earth System Sciences, Vol 2, Iss 3/4, Pp 181-185 (2002) |
| Druh dokumentu: | article |
| ISSN: | 1561-8633 1684-9981 |
| Popis: | Results of laboratory experiments are presented in which a finite suspension of sawdust particles was released instantaneously into a rectangular channel immersed in a water tank. Two kinds of gravity currents were studied: currents with or without entrainment of particles from the bed. Experiments were repeated for two slopes: 30° and 45°. We observed that the velocity of the front was significantly in-creased as particle entrainment occurred. In addition, our experiments showed that the front kept a quasi-constant velocity for both runs. This might suggest that the flow regime corresponded to the "slumping regime" or "adjustment phase" described earlier by Huppert and Simpson (1980). |
| Databáze: | Directory of Open Access Journals |
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