Mathematical models for the sedimentation of suspensions

Berres, S; Wendland W.L.; Burger, R


Mathematical models for sedimentation processes are needed in numerous industrial applications for the description, simulation, design and control of solid-liquid separation processes of suspensions. The first simple but complete model describing the settling of a monodisperse suspension of small rigid spheres is the kinematic sedimentation model due to Kynch [93], which leads to a scalar nonlinear conservation law. The extension of this model to flocculated suspensions, pressure filters, polydisperse suspensions and continuously operated clarifier-thickener units give rise to a variety of time-dependent partial differential equations with intriguing non-standard properties. These properties include strongly degenerate parabolic equations, free boundary problems, strongly coupled systems of conservation laws which may fail to be hyperbolic, and conservation laws with a discontinuous flux. This contribution gives an overview of the authors' research that has been devoted to the mathematical modeling of solid-liquid separation, the existence and uniqueness analysis of these equations, the design and convergence analysis of numerical schemes, and the application to engineering problems. Extensions to other applications and general contributions to mathematical analysis are also addressed. © Springer-Verlag Berlin Heidelberg 2006.

Más información

Título según SCOPUS: Mathematical models for the sedimentation of suspensions
Título de la Revista: Lecture Notes in Applied and Computational Mechanics
Volumen: 2006
Número: 28
Editorial: Springer Verlag
Fecha de publicación: 2006
Página de inicio: 7
Página final: 44
Idioma: eng