Résumé Fluidized beds are a particular hydrodynamic configuration in which a pack (either
dense or loose) of particles laid inside a container is re-suspended as a result of an upward …

Rapid gravitational flows such as debris avalanches and debris flows may entrain significant
amounts of in situ material along their tracks, increasing their volume. Interactions between …

Bed load sediment transport is typically formulated as a nonlinear function of the shear
stress exerted on the bed in excess of a critical value. However, due to the inherent spatial …

Hydrodynamics of circulating fluidized beds deal, on the one hand, with the dynamics of gas—
solid suspensions over a certain solid concentration range (voidage: 0.7–0.999) and, on the …

In steep rivers, sediment is often transported over immobile cobbles and boulders. Previous
studies of such conditions have observed that the entrainment rate of the mobile sediment …

As mentioned in the introduction, currently we are still using the classical concept of relating
bed shear stress to a particle transport rate. In this chapter, we discuss this commonly used …

Numerical models are a powerful tool for investigating the dynamic processes in the interior
of the Earth and other planets, but the reliability and predictive power of these discretized …

Bed load transport is a highly complex process. The probability density function (PDF) of
particle velocities results from the local particle momentum variability in response to fluid …

Field measurements indicate that, in gravel bed rivers, bed load may not be a one‐to‐one
response to shear stress but may instead fluctuate a great deal over time for a given flow …

Bedload measurements comprise an important component in the development of reliable
formulae, in an effort to obtain the necessary constitutive relations between amount of …