The problem of steady Magnetohydrodynamic boundary layer flow of an electrically conducting nanofluid due to an exponentially permeable stretching sheet with heat source/sink in presence of thermal radiation is numerically investigated. The effect of transverse Brownian motion and thermophoresis on heat transfer and nano particle volume fraction considered. The governing partial differential eq...

In Ireland, timber and biomass haulage faces the challenge of transporting enough material within strict legal dimensions and gross vehicle weights restrictions for trucks and trailers. The objective of this study was to develop a method to control payload weight by knowing the moisture content of the wood. Weights, volumes, and moisture content were gathered from 100 truckloads of Sitka spruce...

Adaptive materials with rapidly controllable and switchable energy-absorption and stiffness properties have a number of potential applications. We have developed, characterized and modeled a class of adaptive energy-absorbing systems consisting of nonlinear poroelastic composites wherein a field-responsive fluid, such as a magnetorheological fluid or a shear-thickening fluid, has been used to m...

This paper presents a new mathematical technique for the identification of two rheological model functions (namely, the hindered settling and effective solid stress functions) obtained from concentration profiles measured during the centrifugation of flocculated suspensions. We consider both a rotating tube and a basket centrifuge at a given angular velocity, and assume that the radius (i.e., t...

The viscosity or, more precisely, the rheological behavior of colloidal suspensions is most sensitive to the overall properties of both the particles (mainly size and shape) and their double layers (surface charge and double layer thickness). The mere presence of uncharged colloids alters the ̄ow ®eld in such a way that the apparent dynamic viscosity of the suspension, g, is larger than that of ...

We use the lattice element method to investigate stress fields at the subparticle scale in granular solids composed of particles embedded in a cementing matrix. The stress distributions are found to be similar in 2D and 3D samples subjected to vertical loading with free lateral boundaries. We find that the number of strong forces falls off exponentially at high particle volume fractions where a...

The present investigation is based on the idea of intensifying the gas-solids contact in a circulating fluidized bed by introducing obstacles into it. Such obstacles may effectively suppress radial inhomogeneities in the solids flux and concentration, increase the dynamic solids hold-up, and break up solids clusters. This article (Part I) deals with the hydrodynamics (pressure drop and solids h...

the aim of the present paper is to study the cu-water nanofluid flow and heat transfer characteristics of a stretching permeable cylinder. thermal radiation effect is considered in energy equation. the governing partial differential equations with the corresponding boundary conditions are reduced to a set of ordinary differential equations with the appropriate boundary conditions using similari...

The numerical simulation of solid-gas two-phase flow is an important tool in the prediction of its flow behavior. Predicting the axial pressure profile is one of the major difficulties in modeling of solid-gas two-phase flow. A model using a Particle Based Approach (PBA) is developed to accurately predict the axial pressure profile in a vertical annular tube. The simulation model accounts for t...

We study ionic magnetic colloidal dispersions, which are constituted of -Fe2O3 nanoparticles dispersed in water, and stabilized with electrostatic interparticle repulsion. The phase diagram V versus ( : osmotic pressure, V : particle volume, : particle volume fraction) is explored, especially in the range of high and high . The osmotic pressure of the colloidal dispersion is known either by a m...