Sturzstroms are a rare category of rock avalanche that travel vast horizontal distances with only a comparatively small vertical drop in height. Their extraordinary mobility appears to be a consequence of sustained fluid-like behavior during motion, which persists even for driving stresses well below those normally associated with granular flows. One mechanism that may explain this temporary in...

The hydrodynamic studies of fluidized bed reactor has been reported in terms of pressure drop, minimum fluidization velocity and bed volume expansion to contribute to the optimization of the CNTs production parameters in fluidized bed reactors. Minimum fluidization velocity and pressure drop, as the most important parameters, were taken into account for the investigation of the hydrodynamic beh...

A CFD-DEM model for aerated vibratory convection was developed to explore the coupled gas-solid interactions governing bulk powder bed dynamics. Each simulation prepared by carefully characterizing rough, porous conveyor baseplate and four candidate particle sizes representative of typical beds. Trends in particles between 20 250 μm diameter could be explained considering each powder's minimum ...

This study presents a new method to remove lignin from wheat straw (lignocellulosic) using the ozonation technique. Lignocellulosic material is complex biopolymer composed of cellulose, hemicellulose and lignin. Apart lignin, which acts as chemical resistant, lignocellulosic main resource cellulose sugars. The reaction takes place in two-phase solid–gas fluidization stainless steel reactor. foc...

The fluidization of Petri nets is a relaxation technique introduced in the literature in order to avoid the so called state explosion problem. This technique results in a model, named continuous or fluid, whose state variables (the marking at the places) take real nonnegative values. Among the implications, the fluidization opens the possibility for transferring concepts and techniques from the...

The vibrofluidized bed developed in this work, consisting of a transparent plexiglass tube with an inner diameter of 0.1 m and a height of 0.5 m, was designed for the fluidization of adipic acid. The fluidization behavior of dry adipic acid with particle diameters in the range of 75 600 μm and a density of 1340kg/m was studied using mechanical vibration for different sample loads. Variables stu...

Hemolysis and fluidization of erythrocytes (RBC) membranes by some newly synthesized aminophosphonates as well as their potency to induce electrolyte efflux from cucumber (Cucumis sativus cv "Wisconsin") cotyledons were studied. Also, the chlorophyll content in aminophosphonate-treated cotyledons was affected. The compounds studied differed mainly in hydrophobicity of their substituents at the ...

In this paper, the mechanism of fault pressurization in rapid slip events is analyzed on the basis of a complete characterization of the thermo-poro-mechanical behavior of a clayey gouge extracted at 760m depth in Aigion fault in the active seismic zone of the Gulf of Corinth, Greece. It is shown that the thermally collapsible character of this clayey gouge can be responsible for a dramatic red...