Two-phase modeling of batch sedimentation

A two-phase model for the simulation of sedimentation processes is presente d. The model solves the continuity and momentum equations for the pure-clea r liquid and the sludge phases, and it is verified against a well-known ben chmark problem, for which analytical solutions exist, Numerical simulations of a typical 1-D batch sedimentation process for mono-dispersed particles are carried out and results are found to be in satisfactory agreement with experimental data and model predictions of other researchers. A further exp ansion of the model to two-dimensions leads to predictions of the dynamic b ehavior of settling tanks and the effect of the inclination angle on the se dimentation process. (C) 1999 Elsevier Science Inc. All rights reserved.