TITLE:
Size Exclusion Mechanism, Suspension Flow through Porous Medium
AUTHORS:
Hooman Fallah, Afrouz Fallah, Abazar Rahmani, Mohammad Afkhami, Ali Ahmadi
KEYWORDS:
Transport; Porous Medium; Particulate Suspension Flow; Size Exclusion
JOURNAL NAME:
International Journal of Modern Nonlinear Theory and Application,
Vol.1 No.4,
January
2,
2013
ABSTRACT: A lot of investigations have been done in order to understand the mechanisms of the transport of particulate suspension flow through porous medium. In general, Deep Bed Filtration studies have been conducted to analyse the mechanism involved in the processes of capturing and retaining particles occurs throughout the entire depth of the filter and not just on the filter surface. In this study, the deep bed filtration mechanism and the several mechanisms for the capture of suspended particles are explained then the size exclusion mechanism has been focused (particle capture from the suspension by the rock by the size exclusion). The effects of particle flux reduction and pore space inaccessibility due to selective flow of different size particles will be included in the model for deep bed filtration. The equations for particle and pore size distributions have been derived. The model proposed is a generalization of stochastic Sharma-Yortsos equations. Analytical solution for low concentration is obtained for any particle and pore size distributions. As we will see, the averaged macro scale solutions significantly differ from the classical deep bed filtration model.