A general two-phase debris flow model

• Published in: Journal of Geophysical Research: Earth Surface Vol. 117; no. F3
• Main Author: Pudasaini, Shiva P.
• Format: Journal Article
• Language: English
• Published: Washington, DC Blackwell Publishing Ltd 01.09.2012; American Geophysical Union
• Subjects: Avalanches; Buoyancy; Cryosphere; Debris flow; Detritus; Earth sciences; Earth, ocean, space; Exact sciences and technology; general two-phase debris flow; generalized drag; generalized drag, buoyancy, virtual mass, Newtonian and non‐Newtonian viscous stresses; Hydrology; Landslides & mudslides; Momentum transfer; Multiphase flow; Newtonian and non-Newtonian viscous stresses; particle-laden and dispersive flows; physical modeling; Sediment transport; sediment transports; sediment transports, particle‐laden and dispersive flows; virtual mass; advection; stress; models; Two phase flow; mixing; debris flows; plasticity; Submarine; Strong coupling; buoyancy; lead; dynamics; Momentum transfer; sediment transport; avalanches; Drag; separation; deformation; Diffusion; particles; Natural hazards; inclusions

This paper presents a new, generalized two‐phase debris flow model that includes many essential physical phenomena. The model employs the Mohr‐Coulomb plasticity for the solid stress, and the fluid stress is modeled as a solid‐volume‐fraction‐gradient‐enhanced non‐Newtonian viscous stress. The gener...