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| Hermidas, Navid; Silva Jacinto, Ricardo; Eggenhuisen, Joris T.; Luthi, Stefan M.. |
| A new viscoelastic constitutive model for subaqueous clay-rich gravity flows is presented. It is explained that for the materials which exhibit a minimum in their strain controlled flow curves the structure parameter must be a symmetric function of strain rate and stress. Therefore, the destruction of structure within the material is modeled using the dissipation energy. An expression for the elastic strain of the flowing structure is derived. The final set of equations can reproduce the viscosity bifurcation that clay suspensions may exhibit under a given load. This is explained to be important for prediction of the run-out distance of clay-rich gravity flows. The ability of the model to reproduce the general response of pasty materials to step stress and... |
| Tipo: Text |
Palavras-chave: Gravity flow; Thixotropy; Clay suspension; Viscosity bifurcation. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00483/59497/62365.pdf |
