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An experimental study of particle-driven gravity currents on large slope with entrainment of particles

Abstract : Results of laboratory experiments are presented in which a finite volume of suspended sawdut particles was released instantaneously into a rectangular channel immersed in a water tank. Two kinds of experiments were performed : experiments with entrainment, by the gravity current, of deposited particles and experiments without entrainment. These two experiments were repeated for a slope angle of 30° and for a slope angle of 45°. From the comparison of these experiments it has been noticed that when entrainment occurs the front of the turbidity current is more rapid than when there is no. The exploitation of our results leads us to the conclusion that during the whole duration of the experiment the turbidity current remains in what is usually called the first or adjustment phase or even slumping regime. We show that all our gravity currents have a constant velocity during the run.
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https://hal.inrae.fr/hal-02580462
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Submitted on : Thursday, May 14, 2020 - 8:25:30 PM
Last modification on : Wednesday, October 20, 2021 - 12:58:17 AM

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  • HAL Id : hal-02580462, version 1
  • IRSTEA : PUB00010179

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Marie Rastello, C. Ancey, F. Ousset, R. Magnard, E. Hopfinger. An experimental study of particle-driven gravity currents on large slope with entrainment of particles. European Society of Geophysics, Nice, Avril 2001, 2001, nice, France. pp.6. ⟨hal-02580462⟩

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