共查询到2条相似文献,搜索用时 0 毫秒
1.
P. Bedrikovetsky 《Transport in Porous Media》2008,75(3):335-369
Micro scale population balance equations of suspension transport in porous media with several particle capture mechanisms
are derived, taking into account the particle capture by accessible pores, that were cut off the flux due to pore plugging.
The main purpose of the article is to prove that the micro scale equations allow for exact upscaling (averaging) in case of
filtration of mono dispersed suspensions. The averaged upper scale equations generalise the classical deep bed filtration
model and its latter modifications. 相似文献
2.
Chongbin Zhao B. E. Hobbs A. Ord P. Hornby Shenglin Peng 《Transport in Porous Media》2008,73(1):75-94
In this article, the effect of reactive surface areas associated with different particle shapes on the reactive infiltration
instability in a fluid-saturated porous medium is investigated through analytically deriving the dimensionless pore-fluid
pressure-gradient of a coupled system between porosity, pore-fluid flow and reactive chemical-species transport within two
idealized porous media consisting of spherical and cubic grains respectively. Compared with the critical dimensionless pore-fluid
pressure-gradient of the coupled system, the derived dimensionless pore-fluid pressure-gradient can be used to assess the
instability of a chemical dissolution front within the fluid-saturated porous medium. The related theoretical analysis has
demonstrated that (1) since the shape coefficient of spherical grains is greater than that of cubic grains, the chemical system
consisting of spherical grains is more unstable than that consisting of cubic grains, and (2) the instability likelihood of
a natural porous medium, which is comprised of irregular grains, is smaller than that of an idealized porous medium, which
is comprised of regular spherical grains. To simulate the complicated morphological evolution of a chemical dissolution front
in the case of the chemical dissolution system becoming supercritical, a numerical procedure is proposed for solving this
kind of problem. The related numerical results have demonstrated that the reactive surface area associated with different
particle shapes can have a significant influence on the morphological evolution of an unstable chemical-dissolution front
within fluid-saturated porous rocks. 相似文献