Modelling the thixotropic behaviour of dense cohesive sediment suspensions
Toorman, E.A. (1997). Modelling the thixotropic behaviour of dense cohesive sediment suspensions. Rheol. Acta 36(1): 56-65
In: Rheologica Acta. Springer: Berlin; Heidelberg. ISSN 0035-4511; e-ISSN 1435-1528, meer
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| Trefwoorden |
Modelling
Models > Mathematical models
Particulates > Suspended particulate matter > Sediments > Resuspended sediments
Physics > Mechanics > Kinetics
Sediments > Cohesive sediments
Thixotropy
Marien/Kust |
| Abstract |
A dense cohesive sediment suspension, which contains primarily clay particles, is a thixotropic non-ideal Bingham fluid with a true yield stress. Its time-dependent rheological behaviour can be described by the structural kinetics theory in which the yield stress is taken as a measure for the structural parameter. This theory allows the construction of a more general equation of state, which is independent of the rate equation. The applicability of the model is demonstrated by examples of the prediction of constant structure curves and of transient behaviour. The thixotropy model is incorporated into a Navier-Stokes solver to stimulate the flow behaviour in a Couette viscometer. |
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