Title Simulation of a snow avalanche model test using computational fluid dynamics
Author Oda, K.; Moriguchi, S.; Kamiishi, I.; Yashima, A.; Sawada, K.; Sato, A.
Author Affil Oda, K., Gifu University, Gifu, Japan. Other: National Research Institute for Earth Science and Disaster Prevention, Japan
Source Annals of Glaciology, 52(58), p.57-64, . Publisher: International Glaciological Society, Cambridge, United Kingdom. ISSN: 0260-3055
Publication Date 2011
Notes In English. 20 refs. GeoRef Acc. No: 310210
Index Terms avalanches; density (mass/volume); experimentation; fluid dynamics; mass movements (geology); measurement; models; simulation; environment simulation; slope stability; slopes; snow; viscosity; density; experimental studies; fluidization; friction angles; laboratory studies; mass movements; motions; natural hazards; numerical models; two-phase models
Abstract Here we apply a two-phase flow model to simulate snow avalanche motion. Flowing snow is modeled as a Bingham fluid. Small- scale laboratory experiments were conducted using a rotating viscometer to validate the constitutive model. Experimental scale model test-runs were also performed, and run-out distances and impact pressures obtained in the model tests were reproduced using the twophase flow model. Comparisons revealed that the simulated results were strongly dependent on the basal friction angle and calculation mesh size. Although the method reproduced the laboratory model results quite well, constitutive aspects of the basal surface remained unsolved. Future research will need to incorporate a numerical technique to handle the basal boundary, such as a boundary-fitted coordinate technique.
URL http://www.igsoc.org/annals/v52/58/A58A090.pdf
Publication Type journal article
Record ID 65007353