Combined depth and cake filtration coupled to flow simulation

Almost all theoretical studies on solid-liquid separation are either dedicated to depth filtration or cake filtration regimes, just a few are considering the case, when depth filtration is followed by cake filtration. At the same time, very little attention is paid to a case, which often occurs for polydisperse dust, namely combined depth and cake filtration. This study is devoted to the macroscopic modeling of such filtration processes. The flow resistivity and the filtration efficiency are studied in the case of a relatively dilute suspension of polydisperse spherical particles. Constant flow rate filtration is considered, which leads to an increase of the pressure drop. A mathematical model based on macroscopic equations for depth filtration is used. A first effort is made to couple this model with a flow simulation for two-dimensional problems.