Effect of Coarse Particle Volume Fraction on the Yield Stress of Muddy Sediments from Marennes Oléron Bay

Abstract

Coastal erosion results from a combination of various factors, both natural and humaninduced, which have different time and space patterns. In addition, uncertainties still remain about the interactions of the forcing agents, as well as on the significance of non-local causes of erosion. We focused about the surface sediments in the Marennes Oléron bay, after a general description of the site that has many various activities. The superficial sediments show a mechanical behavior, mainly depends on the fine fraction for a composition that contains up to 60% of sandy material. Fine sediments fraction has a typical yield stress depending naturally of concentration or water content. This yield could be modified slightly or significantly by adding silt or sand. As a result, the rheological measurement sensitivity allows us to characterize five typical sediments that correlate with solid fraction and fine fraction.

Rheology and Biostratigraphy of the Mariana Serpentine Muds Unravel Mud Volcano Evolution

“…More hydrated (and more porous) samples yield lower viscosities than their less hydrated (and less porous) counterparts (Figure ), thus highlighting how water content deeply affects the viscous properties of serpentine muds. In these samples, grain size seems not to have a particular effect on viscosity, whereas changes in solid fraction are directly proportional to changes in viscosity (Figure ), in agreement with Pantet et al ().…”

Rheological behaviour of pure clay and coarse-grained clay suspensions using an inclined blade vane-in-cup

“…Journal Pre-proof dissipation within the suspension [e.g., 6,28,38,39,40]. Based on a nonlinear homogenization method, Chateau et al [41] developped a model to predict the yield stress τ y as a function of the coarse volume fraction φ c as…”

Soft Robot Actuation Strategies for Locomotion in Granular Substrates

“…We performed all the experiments for this work in an acrylic enclosure filled with plastic polypropylene pellets, (Fig.2). These particles where chosen because of their heterogeneous shape, and most importantly because this material has a volume fraction of 0.5 similar to a sand silt mixture [45]. The volume fraction for the polypropylene pellets was calculated as = / where ϕ denotes the volume fraction, the volume of the particles, and the total volume.…”