Acoustic waves in unsaturated soils

Determination of sediments diameter using acoustic waves

The use of acoustic waves in researches related to sea water is of most importance among scientists recently. Since these waves are the only waves, transmitted in water with lowest attenuation and high speed, they can be used in many scientific fields. The main goal of this research is to better understand the physics and mechanisms of sound-seabed interaction, including acoustic penetration, p...

Flow Simulation in Unsaturated, Heterogeneous Soils

Porous media flow models are applied in important areas of interest, including environmental studies or industrial applications. In this case, large-scale experiments are usually expensive, or even impossible, so computer simulations should replace them. Here we focus on the numerical simulation of a flow in an unsaturated, heterogeneous soil. We summarize briefly some results concerning the mo...

Steady flows in unsaturated soils are stable

The stability of steady, vertically upward and downward flow of water in a homogeneous layer of soil is analyzed. Three equivalent dimensionless forms of the Richards equation are introduced, namely the pressure head, saturation, and matric flux potential forms. To illustrate general results and derive special results, use is made of several representative classes of soils. For all classes of s...

Electromagnetic Waves in Contaminated Soils

Theoretical Undrained Shear Behaviour of Unsaturated Soils

Prediction method for undrained shear behaviour of unsaturated soils is discussed in this paper. Based on Original Cam Clay model, authors have proposed constitutive model for unsaturated soils that the effect of water content is incorporated into superloading surface concept. Firstly, stress path of constant volume shear test is formulated under constant void ratio condition. And relationship ...