A thermodynamically consistent constitutive model for fluid mud |
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| Authors: | Anna Hülsmann Udo Nackenhorst Andreas Wurpts |
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| Institution: | 1. Institute of Mechanics and Computational Mechanics, Leibniz Universität Hannover, Appelstr. 9A, D-30167 Hannover;2. Coastal Research Station, NLWKN-Bst. Norden-Norderney, An der Mühle 5, D-26548 Norderney |
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| Abstract: | In this contribution, an approach towards a thermodynamically consistent constitutive model for fluid mud is presented. Fluid mud exhibits highly non-Newtonian, thixotropic behaviour. It can be classified as a structured fluid. Typically, its viscosity is modeled using Bingham-type rheological models of different complexity 1, 2]. Here, the three-dimensional non-Newtonian constitutive behaviour will be modeled based on a visco-elasto-plastic model. At the current stage, a Drucker-Prager-like yield function has been formulated. Viscosity is assumed to be a function of shear viscosity. First results show the general ability to represent experimental data. (© 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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