A Two-Layer Framework for the Modelling of Submarine Slide-Induced Debris Flows Transitioning to Turbidity Currents

摘要

In the present work, a two-layer model is introduced to study thedynamics of transitional flows. It considers a dense basal layer withhigh density that is characterized by a non-Newtonian rheology, and adilute upper layer of variable density constituting a turbulent turbiditycurrent with Newtonian rheology. Results from this depth-averagedtwo-layer model are presented for a 2D case on idealized bathymetryfeaturing a slope break, as well as for a hypothetical 2D case study onan actual submarine bathymetry.