HR: 11:00h
AN: V42B-03 [Abstracts]
TI: Application of Two-fluid Models to Debris Flows
AU: * Bursik, M
EM: mib@buffalo.edu
AF: Geophysical Mass Flow Group, University at Buffalo, SUNY, Buffalo, NY 14260
United States
AU: Kumar, D
EM: dkumar@eng.buffalo.edu
AF: Geophysical Mass Flow Group, University at Buffalo, SUNY, Buffalo, NY 14260
United States
AU: Patra, A
EM: abani@eng.buffalo.edu
AF: Geophysical Mass Flow Group, University at Buffalo, SUNY, Buffalo, NY 14260
United States
AU: Pitman, B
EM: ebpitman@buffalo.edu
AF: Geophysical Mass Flow Group, University at Buffalo, SUNY, Buffalo, NY 14260
United States
AU: Cronin, S
EM: S.J.Cronin@massey.ac.nz
AF: Soil and Earth Sciences Group
Soil and Earth Sciences Group
Soil and Earth Sciences Group, Institute of Natural Resources
Massey University
Private Bag 11 222, Palmerston North, 00000
New Zealand
AB:
Debris flows as opposed to debris avalanches are characterized by the
presence of intergranular fluid. It is postulated that intergranular
and basal friction are reduced by the presence of such fluid, thus,
higher momenta are gained and sustained over long periods of time,
carrying the flowing masses over the greater distances. Modeling the
complex interaction between solid and fluid phases in such flows is
difficult and a number of models have been presented in recent
years. In this work we present application of a two fluid model using
hyperbolic solution methodology for such debris flows, and apply it to
simulating flows over natural terrain at two sites of interest:
Ruapehu volcano, New Zealand, and Colima volcano, Mexico. In contrast
to mixture theory models, the two fluid model separately solves for
granular and fluid phase mass and momenta with the interaction between
phases represented by a drag force-like term. Adaptive parallel
solution methodology and integration with a geographic information
system, make it feasible to do realistic simulations on
representations of the natural terrains.
UR: http://www.gmfg.buffalo.edu
DE: 1810 Debris flow and landslides
DE: 3225 Numerical approximations and analysis (4260)
DE: 8488 Volcanic hazards and risks
SC: Volcanology, Geochemistry, Petrology [V]
MN: Fall Meeting 2005