By Christian Holm, Kurt Kremer, S. Auer, K. Binder, J.G. Curro, D. Frenkel, G.S. Grest, D.R. Heine, P.H. Hünenberger, L.G. MacDowell, M. Müller, P. Virnau
Soft subject technological know-how is these days an acronym for an more and more vital
class of fabrics, which levels from polymers, liquid crystals,
colloids as much as advanced macromolecular assemblies, masking sizes from
the nanoscale up the microscale. desktop simulations have confirmed as an
indispensable, if now not the main strong, software to appreciate homes
of those fabrics and hyperlink theoretical types to experiments. during this
first quantity of a small sequence well-known leaders of the sphere assessment
advanced subject matters and supply serious perception into the state of the art
methods and clinical questions of this full of life area of sentimental
condensed subject research.
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Extra info for Advanced Computer Simulation Approaches for Soft Matter Sciences I
Thus, the structure formation is facilitated by a gentle shearing motion (rolling) but a more intense motion (shaking) destroys the structure. This suggests that there is a critical amount of shear beyond which re-formation of structure is not induced but breakdown occurs. They attributed this behavior to the anisometric shape of RAJ: “dk3171_c002” — 2006/6/8 — 23:03 — page 31 — #23 32 Bubbles, Drops, and Particles in Fluids gypsum particles. It is not uncommon for the same suspension/dispersion to display both thixotropy as well as rheopexy under appropriate conditions of shear rate and the solid contents.
Limited efforts have also been made to establish the nature of dependences of the fluid model parameters on composition, temperature, etc. , 1998). ) of the material. 3 Shear-Thickening Fluids These materials, also known as dilatant materials, are similar to shear-thinning materials in that they show no yield stress but their apparent viscosity increases with increasing shear rate. This type of flow behavior is encountered in concentrated suspensions of solids, and can be qualitatively explained as follows: When a suspension is at rest, the voidage is minimum and the liquid present is just sufficient to fill the void spaces.
The chapter is concluded by presenting a brief discussion on the variety of anomalous phenomena observed in packed beds such as slip effects, adsorption, gel formation, differences between the bulk and the in situ rheological characteristics, mechanical degradation of polymers in flow conditions, etc. Hydrodynamically similar problems of fluidization and sedimentation are treated in Chapter 8. In particular, the influence of non-Newtonian characteristics on the bed expansion dynamics, minimum fluidization velocity, and the rate of sedimentation of concentrated suspensions in the initial constant concentration region are examined in this chapter.
Advanced Computer Simulation Approaches for Soft Matter Sciences I by Christian Holm, Kurt Kremer, S. Auer, K. Binder, J.G. Curro, D. Frenkel, G.S. Grest, D.R. Heine, P.H. Hünenberger, L.G. MacDowell, M. Müller, P. Virnau
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