Fine grinding in wet stirred media mills is a key operation numerous industrial processes. During milling, beads (typically millimetre scale) collide with each other under rapid agitation. These collisions transfer energy into the surrounding medium, feed stream comprising premixed slurry (a suspension of micron-sized particles), leading to reduced particle size. Numerical simulation provides a...

Vertical stirred mills have been widely applied in the minerals industry, due to its greater efficiency comparison with conventional tumbling mills. In this context, agitator liner wear plays an important role maintenance planning and operational costs. paper, we use discrete element method (DEM) simulation evaluate screw wear. Three different mill rotational velocities are evaluated simulation...

Abstract Carboxymethylcellulose (CMC) and ultrasound gel (USG) seem to be suitable clear model fluids substitute real ultra-high-performance concretes (UHPCs), enabling experimental monitoring of events occurring within these mixtures at similar flow behaviour. USG is eligible for UHPC with significant yield stress. CMC having a concentration better UHPCs exhibiting indistinct The rheological b...

knowledge of fluid flow can play a basic role in optimizing mixing processes. in preparation of sodium perborate, sodium metaborate and hydrogen peroxide, as raw materials, mix and react in the presence of a turbine mixer. in this investigation, the effect of the presence of baffle in a mixing tank equipped with a two-impeller turbine agitator was studied. at first, steady state flow in the tan...

SIR—The concept of ‘frailty’ has been used to identify older adults at increased risk for disability [1, 2]. A major obstacle to developing primary prevention strategies for frailty is the lack of clinical markers of early frailty, especially among high functioning older adults. The Physical Performance Battery (PPB) has been reported to predict disability in older adults [3, 4], but its associ...

PURPOSE The objective of this study was to describe spatial and temporal parameters during gait in pregnant women, and to compare it with women in post-partum and with a control group. METHODS To investigate alteration in natural locomotion, we used an electronic walkway (GAITRite system). Fifty-eight pregnant women (four last months of pregnancy), nine post-partum women and twenty-three heal...

This study investigates the relation between walking speed and the distribution of peak plantar pressure and compares a traditional ten-region subsampling (10RS) technique with a new technique: pedobarographic statistical parametric mapping (pSPM). Adapted from cerebral fMRI methodology, pSPM is a digital image processing technique that registers foot pressure images such that homologous struct...

Several industrial fields require mixing and mechanical agitation processes. This operation is mainly used to enhance heat mass transfer inside stirred tank systems improve the degree of homogeneity obtain a high-quality final product. The main goal this research paper analyze thermal hydrodynamic behavior non-Newtonian nanofluid (Bingham–Papanastasiou–Al2O3) symmetrically tank. A 3D numerical ...