Rheological flow laws can be obtained from studies using multi-anvil high-pressure systems with synchrotron-based piezometers and strain metrics. The high flux X-ray source provides minute-scale time resolution with accurate measurement of diffraction patterns and direct sample images. Measurements of length changes with an accuracy of one part in 104 are being developed and will provide a new ...

Economic processing of lignocellulosic biomass requires handling the biomass at high solids concentration. This creates challenges because concentrated biomass behaves as a Bingham-like material with large yield stresses. Here we employ torque rheometry to measure the rheological properties of concentrated lignocellulosic biomass (corn stover). Yield stresses obtained using torque rheometry agr...

In t h i s paper we b r i e f l y p resen t t h e main re levan t physical q u a n t i t i e s i n t h e rheology of concentrated d i spers ions . Main l i n e s o f t h r e e t o p i c s ( s h e a r v i scos i ty , sedimentation ve loc i ty and aggregation processes) a r e then given. The importance o r ordered or random s t r u c t u r e s is emphasized. Nature and i n d u s t i a l processes...

Abstract Bulk directional enhancement factors are determined for axisymmetric (girdle and single-maximum) orientation fabrics using a transversely isotropic grain rheology with an orientation-dependent non-linear fluidity. Compared to fluidities that simplified as independent, we find bulk strain-rate enhancements intermediate-to-strong can be up factor of ten larger, assuming stress homogeniza...

The flow of sand on a rough inclined plane is investigated experimentally. We directly show that a jammed layer of grains spontaneously forms below the avalanche. Its properties and its relation with the rheology of the flowing layer of grains are presented and discussed. In a second part, we study the dynamics of erosion and deposition solitary waves in the domain where they are transversally ...

To explain Venus' young surface age and lack of plate tectonics, tectonic regime has often been proposed to be either an episodic-lid with global lithospheric overturns, or equilibrium resurfacing numerous volcanic activities. Here, we use 2-D thermochemical convection models realistic parameters, including rheology (dislocation creep, diffusion plastic yielding), experiment-based plagioclase (...