Mathematical model and numerical simulation of the dynamics of flocculated suspensions in clarifier-thickeners [An article from: Chemical Engineering Journal]

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Description:
We formulate a mathematical model for continuous sedimentation-consolidation processes of flocculated suspensions in clarifier-thickener units. The governing equation of this model is a scalar, strongly degenerate parabolic equation in which both the convective flux and the diffusion term depend on parameters that are discontinuous functions of the depth variable. A simple finite-difference scheme for the numerical solution of the model is introduced. We perform a limited analysis of steady states as desired stationary modes of operation. Finally, numerical examples illustrate that the model realistically describes the dynamics of flocculated suspensions in clarifier-thickeners.