Numerical analysis of Mud flow using VOF scheme with Non-Newtonian model

The Tenth International Symposium on Mitigation of Geo-disasters in Asia Matsue Symposium Place: Shimane Civil Center, Matsue Date: 8 October 2012The behavior of high concentration sediment flow was examined as incompressible viscosity free surface fluid with a pseudo-plastic non-Newton fluid model, and the validity is verified by accuracy verification by experiment. The dam break experiment is conducted with various water content ratios, and the fluid-analysis result and experimental result by the VOF method are compared. Correlations between water content ratio and the dynamic viscosity in N-S equation was examined. The result can reproduce the almost same form and it is thought that the correlation between dynamic viscosity and moisture content can be examined

Examination of flowing groundwater condition on riverbank bed using One-meter Depth Temperature and Multipoint Temperature Logging

The Tenth International Symposium on Mitigation of Geo-disasters in Asia Matsue Symposium Place: Shimane Civil Center, Matsue Date: 8 October 2012Various types of soil disaster related with groundwater behaviour. Especially, flowing groundwater flows in very local area causes destabilization of the soil structure. It is very important for clarification of mechanism of the soil disasters. However, exploration of flowing groundwater in local area is very difficult because of heterogeneity of soil quality and groundwater condition. This paper has provided principle and measurement results of two types of exploring method of flowing groundwater. One-meter Depth Temperature method is developed to get information of flowing groundwater route reflected by the ground surface. One-meter Depth Temperature is simple, inexpensive and stable method to detect the local flowing groundwater. We can get information of existence of flowing groundwater by measuring one-meter depth soil temperature, simply. Multipoint Temperature Logging method is also developed. We can get information of vertical location of layers with flowing groundwater. Boring hole was used in Multipoint Temperature Logging method. Measurement of vertical temperature distribution of temperature decreasing process indicates the location of the layers with flowing groundwater. Results of these two methods indicated the three dimensional location of existence of the flowing groundwater in detail

センテイジョウ サイハ ノ ナイブ トクセイ ト エネルギー イッサン ニ カンスル ケンキュウ

本研究は、潜提上砕波に特有の砕波形態を調べ、各砕波形態の内部特性、及びエネルギー逸散特性を、実験、数値解析によって解明することを目的とするものである