Effects of pore size, suspension concentration, and pre-sedimentation on the measurement of filter medium resistance in cake filtration

Network numerical simulation of two-dimensional nonlinear micropolar hydrodynamics in a Darcian porous medium

“…Darcian drag directly affects the Xdirection momentum equation via the term, U/(DaRe) in Eq. (10). As such the Y-direction velocity component (V) which is coupled to the U component via the convective (acceleration term),V ∂U/ ∂Y, in Eq.…”

“…Such media are important in drying systems, as described by Amanifard and Haghi [6], fluid-separation technologies, as studied by Kim and Chung [7], processes involving superposed porous saturated media and fluid layers, as elaborated by Kim et al [8], and hydrogen sulfide biofiltration systems as discussed by Jeong et al [9]. Yim et al [10] have studied porous media flows in the context of cake filtration including pre-sedimentation effects using the Ruth equation. Chun et al [11] have examined the flow of dilute polymer solutions in porous media swelling for potential applications in hydrodynamic chromatography.…”

A Study of Cake Filtration Parameters Using the Constant Rate Process

“…As such, these effects are parameters that are not recognised in the K-C equation, and they become more prevalent with the compressible talc cake. This result may be related to a number of factors, including the shape of the particles or the enhanced contribution to resistance from the fine particles with the size distribution, as discussed by number of authors [11][12][13][14][15][16][17]. The particle shape and contribution of fines to the overall resistance is also being investigated using numerical models (ANN and MVR) to determine permeabilities [40].…”

“…It has been proposed Processes 2019, 7, 746 2 of 17 that a homogeneous constant growth rate of cake, using a constant rate, provides a better packing structure of particles that is independent of cake thickness [6,9,10]. In addition, reports by many authors [11][12][13][14][15][16][17] indicate that, for the cake and the medium, the measured resistances are influenced by the migration of the fine particles, which increases the interactions between the particles and reduces fluid flow rates through them. When filtering suspension with low initial concentrations, the ability of fine particles to migrate into the filter medium is greater.…”

“…When filtering suspension with low initial concentrations, the ability of fine particles to migrate into the filter medium is greater. Therefore, during the initial stages of filtration, the medium resistance will rapidly increase to what is assumed to be a constant value, owing to clogging by fine particles, but is often orders of magnitude greater than the medium resistance in the absence of solids [11][12][13][14][15].…”