Steady, Darcian, 1-D, 1-phase evaporation through a vertically inhomogeneous soil from a horizontal water table is simulated as an optimal control problem, i.e. the hydraulic properties of the porous medium (relative permeability of moisture and capillary water retention curve) are considered as control functions. The Richards nonlinear ordinary differential equation is integrated twice as a bo...

The bearing capacity of strip footings on unsaturated soils is studied using slip line theory. The suction profiles considered are non-uniform with depth and correspond to vertical flow of water by infiltration or evaporation. The slip line theory assumes a plastic equilibrium state of a Mohr-Coulomb soil in which suction influences are included using the effective stress concept. This paper sh...

Suction caissons are widely used foundations in offshore engineering. The change excess pore pressure and seepage field caused by penetration suction significantly affects the soil resistance around caisson wall tip, also deformation of within adjacent to caisson. This study uses Arbitrary Lagrangian–Eulerian (ALE) large solid-fluid coupled FEM investigate changes during process installation sa...

Heavy rainfall can lead to shallow slips in slopes that are initially in a state of partial water saturation. Multiphysics numerical modelling approaches taking into account the involved physical key processes in variably saturated soils during rainfall events could help in understanding the main slip mechanisms. The concerned processes are related to water flow through the solid matrix, soil w...

The compression efficiency of a rolling piston type rotary compressor for room airconditioners was analyzed, Suction passage loss is one of the detracting factors in compression efficiency and we studied its main cause, i.e. the pressure pulsation generated in the suction line, and clarified the relation between suction line specification and suction passage loss. A method of evaluating the suc...

Six slab-on-grade houses in Polk County, Florida, with indoor radon levels between 19 and 80 pCi/1 were mitigated using sub-slab depressurization systems. With the compacted, moist soil fill under the slabs, sufficient sub-slab communications were difficult to establish. Increasing the suction pit size and using more powerful fans improved the strength of the pressure fields within 3 to 8 m of ...