Author(s)

J. Mls

Abstract

A contribution to the problem of the suspension dewatering J. Mls Faculty of Science, Charles University, Prague, Czech Republic Abstract During the sedimentation process of a suspension, a sharp interface develops separating the upper zone of free sedimentation from the lower zone of compression. The position of this interface results from the balance of mass exchange between both the zones. The weight of the solid phase in the compression zone increases the liquid phase pressure. Consequently, the liquid phase is pushed out which causes the required dewatering of the suspension. The paper presents a numerical solution of the process. Based on the equations of Darcian mechanics of two-phase systems and the constitution relations, the governing equations of the problem are formulated. Making use of the mass-balance equation as an additional boundary condition, the problem becomes a moving boundary problem for the compression zone. The form of the governing equations and the imposed boundary co

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