Item: Simulation of Snow Avalanche Based on Thixotropy Model for Snow-Covered Model
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Title: Simulation of Snow Avalanche Based on Thixotropy Model for Snow-Covered Model
Proceedings: International Snow Science Workshop 2016 Proceedings, Breckenridge, CO, USA
Authors:
- Kenichi Oda [ College of Science and Technology Nihon University, Tokyo, Japan ]
- Masatoshi Yamada [ Graduate School of Science and Technology, Nihon University, Tokyo, Japan ]
- Yoshikazu Kobayashi [ College of Science and Technology Nihon University, Tokyo, Japan ]
- Isao Kamiishi [ National Research Institute for Earth Science and Disaster Prevention, Niigata, Japan ]
Date: 2016-10-02
Abstract: In this research, the CFD-based numerical method for snow avalanche using Bingham fluid model is development. This simulation model has already been confirmed that reproduced to actual avalanche motions. However, it is difficult to reproduced a complete resting state of snow avalanche motions because it is solved using the CFD. For this reason, it is not possible to consider the case such as effect of incorporation snow-covered condition. Therefore, this simulation should be set up excessively large value of snow avalanche on initial area of before flowing. In order to be closer to actual avalanche motions, this model should be additionally high accuracy is required. In this study, we introduced new viscosity model such as thixotropy model for reproduced the resting state with snow-covered condition. It was modeled the result from experiment for the viscosity characteristics on fluidized snow. In order to validate that effectiveness of proposed model, the flow experiments of artificial avalanche under the model slope was carried out. In the experiment, to confirm the effect of snow-covered conditions it was previously. And then the simulation of experiments was carried out. These results of simulation and experiment has shown that proposed model is possible to reproduce the experimental. For next step, this research plan to reproduce the actual avalanche using proposed model.
Language of Article: English
Presenters:
Keywords: avalanche, CFD, snow-covered condition, thixotropy
Page Number(s): 509-513
Subjects: snow cover thixotropy model CFD
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Digital Abstract Not Available
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