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channels into account. The results are used to calculate the permeability (K) from an equivalent channel model. Variation of σ … and K with porosity are compared with geological field data. The agreement is quite satisfactory. …
Persistent link: https://www.econbiz.de/10011057284
). Using the results of simulations, the effects of porosity and particle diameters on the hydraulic permeability are …Hydraulic permeability is studied in porous media consisting of randomly distributed monodisperse spheres by means of … regime. The hydraulic permeability is calculated from the Darcy equation once the mean values of velocity and pressure …
Persistent link: https://www.econbiz.de/10011057299
porosity P of the deposits scales as P∼py−δ for small values of p. This general scaling relation is confirmed by our numerical …
Persistent link: https://www.econbiz.de/10011062793
Local densities of a hard sphere fluid in a cylindrical pore filled with quenched disordered hard-sphere matrix are calculated using Born–Green–Yvon equation with Fisher–Methfessel approximation. The solution of replica Ornstein–Zernike equation in the Percus–Yevick approximation for a...
Persistent link: https://www.econbiz.de/10011063013
of structural changes on the porosity network; for example, during the uniaxial compaction of soft spheres, we find the …
Persistent link: https://www.econbiz.de/10010589807
We study the restructuring process of diagenesis in sedimentary rocks using a geometrical model of percolation theory. The competing processes of cementation and dissolution of diagenesis are modelled by growth of vacant sites and culling of occupied sites in a percolation model depending on a...
Persistent link: https://www.econbiz.de/10010590567
been obtained by physical adsorption of different-sized adsorbates. The porosity of the solids is obtained from literature … dimension and porosity. These two equations also illustrate the correlation between fractal dimension and porosity of the porous …
Persistent link: https://www.econbiz.de/10010664914
) the Carman–Kozeny equation cannot describe the permeability behavior as a function of porosity and characteristic lengths …A volume averaging approach is used to estimate the porous media permeability. Contrary to traditional methods that … porous media showed that (i) the local porous medium configuration has an important effect on the permeability value, and (ii …
Persistent link: https://www.econbiz.de/10010871909
In this article, the statistical properties for the renormalized permeability obtained from the renormalization of the … correlated permeability field are investigated. In contrast to the uncorrelated porous media, the scaling of the variance of the … renormalized permeability field exhibits a crossover behavior. When the correlation lengths are larger compared with the domain …
Persistent link: https://www.econbiz.de/10010872665
A new waveguide method is used to investigate high frequency GMI and magnetic permeability in Co-rich amorphous wire … magnetic permeability decreases with increasing frequency, however, its relative change under external magnetic field is still …
Persistent link: https://www.econbiz.de/10010872704