TITLE:
Improved Model for Soil as a Two-Phase Mixture Based on Smoothed Particle Hydrodynamics (SPH)
AUTHORS:
Kousuke Nakamura, Tomoaki Satomi, Hiroshi Takahashi
KEYWORDS:
Soil Improvement, Water Absorption Test, Saturated and Unsaturated Soil, Smoothed Particle Hydrodynamics
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.2 No.12,
November
25,
2014
ABSTRACT: It is desired to resolve soil contamination
with reduced costs. “Insoluble treatment” is a soil improvement method for
heavy metal containing soil, which uses soil mixers to mix soil and soil improvement
liquid agents. To reduce the costs of this method, soil mixers have to be
optimized. However, it is not achieved due to the lack of theoretical knowledge
on mixing solid with liquid. Therefore, a numerical model to simulate the
dynamic behavior of solid and liquid is on the development in this study using
Smoothed Particle Hydrodynamics (SPH) method. To validate the numerical model,
several experiments were carried out and numerically reproduced. The comparisons
of the results showed that the numerical model replicated a liquid flow with an
error rate of 2.1% and a seepage flow with an error rate up to 26.1%.
Especially, the water distribution in the soil pores was highly improved with
absolute gaps in volumetric water content up to 4.4% in the porosity range of
10% - 90%. For the water absorption into dry sand, the simulation result became
more realistic by concerning soil suction.