Some applications of the AMPC model of the shear yield stress of particulate fluids |
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| Institution: | 1. Department of Materials and Metallurgical Engineering, Indian Institute of Technology, Kanpur 208016, India;2. Particle Analysis Center, 338 Comer, West Virginia University, Morgantown, WV 26506, USA;166121. Department of Mathematics and Statistics, Flinders University of South Australia, GPO Box 2100, Adelaide, S.A. 5001, Australia;1. CSIRO Molecular Science, Private Bag 10, Clayton South MDC, Victoria 3169, Australia;2. Department of Applied Chemistry, Royal Melbourne Institute of Technology, City Campus, Latrobe Street, Melbourne, Victoria 3000, Australia;1. Medical University, Faculty of Pharmacy, 1000 Sofia, Bulgaria;2. Bulgarian Academy of Sciences, Central Laboratory of Physico-Chemical Mechanics, 1113 Sofia, Bulgaria;1. Laboratoire de Bactériologie-Virologie, Faculté de Pharmacie, 1, rue Gaston Veil 44035 Nantes Cedex, France;2. Laboratoire de Bactériologie, Virologie, Hygiène hospitalière, Hôtel-Dieu, CHU, Nantes, France;3. Laboratoire de Génétique moléculaire, Hôtel-Dieu, CHU, Nantes, France |
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| Abstract: | The AMPC structural model of shear yield stress of single component suspensions is extended to three important rheological phenomena encountered in particulate fluids. These are shear yield stress of multi-component systems, time dependent shear yield stress of thixotropic suspensions, and compressive yield stress of particulate fluids. The shear yield stress of multi-component suspensions is modeled by summing the interparticle interactions due to all possible combinations of particle sizes and solid constituents. The time dependent shear yield stress of thixotropic muds is simulated by invoking the proportionality between yield stress and interparticle bond density across the shear plane. The compressive yield stress of particulate fluids is calculated by assuming that consolidation occurs by shear but at a narrower gap between the particles. The ability of the model to describe these diverse phenomena reasonably well seemingly validates its basic premise, namely, a 3-dimensional space-filling network of particles whose mechanical properties can be estimated from the theory of strength of particulate assemblage. |
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