This paper proposes a thin layer depth-averaged two-phase model provided by a dissipative energy balance to describe avalanches of solid-fluid mixtures. This model is derived from a 3D two-phase model based on the equations proposed by Jackson [R. Jackson, The Dynamics of Fluidized Particles, 2000] which takes into account the force of buoyancy and the forces of interaction between the solid an...

The occurrence of the secondary disasters of forest fire has significant impacts on the environment quality and human health and safety. Post-fire debris flow is one of the most hazardous secondary disasters of forest fire. To understand the occurrence conditions of post-fire debris flow and to master its occurrence situation are the critical elements in post-fire hazard assessment. From the vi...

Debris flow is an important sedimenttransport mechanism in subaerial and subaqueous environments. Its properties change almost continuously as sediment and water are added to or subtracted from it (Smith and Lowe, 1991; Vallance, 2000). In subaerial environments, debris flows are commonly diluted into hyperconcentrated flows when they encounter a streamflow (Pierson and Costa, 1987; Costa, 1988...

multiphase flows are commonly encountered in oil and gas industries. the transport of multiphase flow causes the formation of slug, the increase of pressure drop and the possibility of phase changes therefore, a set of simulation runs was performed to predict flow regimes in a horizontal pipeline, and the results were compared with the baker chart. the effects of small downward inclinations of ...

Debris flows are typically modelled as a single homogeneous surge due to lack of data support more complex model development and time funding for the practitioner communities they aim support. Coarse debris characterized by coarse front, followed muddy slurry, that is then hyperconcentrated flow phase with lesser sediment concentrations. Presented herein modelling hazard assessment Hummingbird ...

Taiwan is located at the collision boundary of the Philippine sea plate and the Eurasian plate. The mountain terrain is precipitous and the region, on the whole, is characterized by fragile rocks and frequent seismic activity. In addition, the concentrated torrential rainfall brought by typhoons cause extensive disasters, debris flow, the most serious disaster caused by torrential rainfall, lea...