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Article Dans Une Revue Natural Hazards and Earth System Sciences Année : 2002

An experimental study of particle-driven gravity currents on steep slopes with entrainment of particles

Résumé

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).
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Dates et versions

hal-00330885 , version 1 (18-06-2008)

Identifiants

  • HAL Id : hal-00330885 , version 1

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Marie Rastello, Christophe Ancey, Frédéric Ousset, R. Magnard, Emil J. Hopfinger. An experimental study of particle-driven gravity currents on steep slopes with entrainment of particles. Natural Hazards and Earth System Sciences, 2002, 2 (3/4), pp.181-185. ⟨hal-00330885⟩
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