Based on governing equations of saturated porous media and Liapunovs stability, the onset strain localizations of porous media that formularized by solid phase stress and effective stress under seepage flow state are presented here.
Two conclusions are induced from the BISQ model: there is no squirt mechanism in inviscid fluid saturated porous media and there is no “dynamic compatibility” phenomenon in viscid fluid saturated porous media.
After effective fluid model and Darcy′s law in partially saturated porous media are introduced to Biot-Geertsma-Gassmann(BGG) equation,the elastic wave propagating from a saturated porous medium to a Biot-type porous medium saturated by a liquid-gas mixture is investigated.
On the basis of the integral formula mentioned above, the time-domain explicit finite element method is developed for calculation and analysis of the elasto-plastic dynamic response of fluid-saturated porous media.
The approach proposed by Podil'chuk [1] is used to derive a system of equations of motion for saturated porous media, allowance being made for the mutual influence of the solid, liquid, and gas phases.
Some one-dimensional nonlinear effects associated with wave propagation in weakly permeable fluid-saturated porous media are investigated.
On the propagation of pressure waves in saturated porous media
Osmotic Mechanism of Fracture Growth in Saturated Porous Media
The natural convective heat transfer in fluid saturated porous media within a rectangular enclosure heated from below and cooled at the top,both isothermally,while the rest walls are adiabatic,is investigated for the 2-dimensional case,numerically.Rayleigh numbers range from 30 to 300. The indication of the onset of convective flow with the first critical Rayleigh number Ra_c at 40 is verified by the present analysis.The variations in flow field,temperature distribution and heat transfer with the increase...
The natural convective heat transfer in fluid saturated porous media within a rectangular enclosure heated from below and cooled at the top,both isothermally,while the rest walls are adiabatic,is investigated for the 2-dimensional case,numerically.Rayleigh numbers range from 30 to 300. The indication of the onset of convective flow with the first critical Rayleigh number Ra_c at 40 is verified by the present analysis.The variations in flow field,temperature distribution and heat transfer with the increase of Rayleigh number are shown.Correlations of Nusselt number Nu with Rayleigh number Ra at various aspect ratios are given in order to facilitate the heat transfer calculations.
Some pheuomena which can not be interpreted with tradirional hydrodynamic theory were found through careful observation of groundwater regimc. Starting from the elasticity and permeability of water-saturated porous media, the properties of storage and flow of groundwater in elastically deformed confined aquifers were discussed. The gen(?) differential equation and the expression of (?) coefficient (S_s)of groundwater flow through three-(?)sional-elastically deformed confined aquifer were derived. It is...
Some pheuomena which can not be interpreted with tradirional hydrodynamic theory were found through careful observation of groundwater regimc. Starting from the elasticity and permeability of water-saturated porous media, the properties of storage and flow of groundwater in elastically deformed confined aquifers were discussed. The gen(?) differential equation and the expression of (?) coefficient (S_s)of groundwater flow through three-(?)sional-elastically deformed confined aquifer were derived. It is pointed out that: (1)S_s is a constant which is not affected by the flowing of groundwater; (2) the effect of stress or strain on the pore pressure or water level in wells is a wide-spread phenomeuon, The causes of groundwater microbehavior are explained theorelicaly.
This article utilizes the theory of mixtures to formulate a general theory of wave propagation with mass-coupling effect in fluid-saturated porous media. An attempt is made to discuss the physical interpretation and the thermodynamic restriction of the coefficients appearing in the equations obtained. By the comparison it is shown that Biot's classical theory and the present one are essentially consistent. Also, wave velocities in some special cases are calculated, from which it is concluded that mass-coupling...
This article utilizes the theory of mixtures to formulate a general theory of wave propagation with mass-coupling effect in fluid-saturated porous media. An attempt is made to discuss the physical interpretation and the thermodynamic restriction of the coefficients appearing in the equations obtained. By the comparison it is shown that Biot's classical theory and the present one are essentially consistent. Also, wave velocities in some special cases are calculated, from which it is concluded that mass-coupling and permeability of media greatly affect wave propagation behavior.
saturated porous media
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