Modelling the thixotropic behaviour of dense cohesive sediment suspensions
Modelling the thixotropic behaviour of dense cohesive sediment suspensions
复制标题
DOI：
10.1007/bf00366724
复制
发表时间：
1997
期刊：
影响因子：
2.3
通讯作者：
E. Toorman
中科院分区：
文献类型：
--
作者：
E. Toorman
主要含有粘土颗粒的致密粘性沉积物悬浮液是一种具有真实屈服应力的触变非理想宾厄姆流体。其随时间变化的流变行为可以用结构动力学理论来描述，其中屈服应力作为结构参数的度量。这个理论允许构造一个更一般的状态方程，它独立于速率方程。通过恒结构曲线和瞬态特性的预测实例，证明了该模型的适用性。触变性模型被纳入到Navier-Stokes解算器中，以刺激Couette粘度计的流动行为。
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.