A stochastic approach to modelling solid transport in settling tanks - Chebbo, G.; Forgues, N.; Lucas-Aiguier, E.; Berthebaud, S. (Water Science and Technology, 1998)
Dispersion and settling models for suspended solids (SS) in turbulent flow are in the majority of cases Eulerian and deterministic. They simulate SS transport using a convection-diffusion equation. When the diffusion term is supposed not to be zero at the boundary of a settling tank, we show that an alternative(or equivalent) description of the basic convection-diffusion equation for the concentration of suspended solids consists in modelling the particles trajectories as a stochastic diffusion process. This paper has two aims, firstly to present the proposed stochastic approach and secondly to apply this new method to the calculation of a settling tank’s efficiency. (C) 1998 IAWQ. Published by Elsevier Science Ltd.
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