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Showing 1 to 20 of 20 for “"Particle suspension"”.
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Continuum modeling of particle suspension conductivity
A suspension of network-forming, electrically conductive particles imparts electrical conductivity to an otherwise insulating medium. This effect can be used to great effect in many industrial applications. The ability to describe these networks and to predict their physical properties is a key …
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Dilute Non-Newtonian Particle Suspension Rheology And Microstructure
The study of polymeric particle suspensions has been the subject of a number of past experimental and theoretical studies. However, fundamental questions about suspension rheology and shear flow-induced microstructural effects remain. First, a quasi-analytical study is presented that gives the first …
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Examination of Fluid-Particle in Turbulent, Non-Dilute, Particle Suspension Flow
Theoretical modeling and experimental studies of particles suspended in fully developed turbulent water flow in a vertical pipe (I.D. = 18.4 cm) have been conducted. An analytical model has been developed to predict the stochastic motion of particles in a non-dilute turbulent suspension flow. The …
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Analysis of particle suspension and mixing in biological systems : an application of tomography
Includes bibliographical references.
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Experimental and simulation analysis of the jitter response of a single-shot oil switch with a high-K particle suspension
… second of which considers the effects of high-K particle additions to the best-performing fluids. A single-shot high voltage advanced dielectric test stand (HVADTS) was designed and built to test these oils. The HVADTS is capable of applying a 250 kV pulse with a ‘1-cos’ rise-time of 1.6 μs to a …
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Direct Simulations of Fluid-Particle Flow in Newtonian and non-Newtonian Fluids Using Coupled Lattice Boltzmann and Discrete Element Methods
… are employed to investigate a suite of fluid-particle flow problems in both Newtonian and non-Newtonian fluids. First, the rheological properties of finer particle suspensions in a Newtonian fluid are investigated, as the particle shape and solid fraction vary. An increase of the relative …
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A Novel Shear Thinning and Thixotropic Plga Micro Particulate Suspension System for Controlled Drug Delivery
… gelling system formulated as polymer micro particle suspension for low viscosity and better injectability. The system comprised of a hydrophobic polymer plasticizer(s) that resulted in a more diffusion controlled drug release. Necessary physical stability of the suspension based formulation …
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An Analysis of the Turbulent Dispersion of Concentrations of Non-Stokesian Particles (Transport, Low Reynolds Number, Uniform Distributions)
… dispersion of a concentration of non-Stokesian particles has been developed. The basic assumptions for the fluid are that the turbulence is Gaussian, homogeneous, and ergodic. The assumptions for the particle suspension are that the spatial distribution of particles is uniform, the particle …
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Segregation of granular particles in suspension flow
… development of longitudinal stripes of granular particles due to instabilities in particle suspension flow. Research was conducted to characterize environmental phenomena related to granular flows, namely avalanches, mudslides, and the movement of glaciers. Results show the stripes were found to …
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Strengthening porous metal skeletons by metal deposition from a nanoparticle dispersion
… can be accomplished by depositing a metal from a suspension of nanometer-scale iron particles. The nanoparticle deposits from the suspension concentrate in regions of high stress when the solvent is removed by drying. The particles are sintered to create a dense structure that reinforces the …
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Suspension, yielding, microstructure and applications of bacterial cellulose dispersion
… network that forms spontaneously from attractive particles. Fluid products containing colloidal gels have superior suspension abilities, because they possess a yield stress that makes the fluid elastic until a threshold stress is exceeded. Yield stress fluids have been widely studied, but the …
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ΔΙΦΑΣΙΚΗ ΡΟΗ ΑΕΡΑ - ΣΤΕΡΕΩΝ ΣΩΜΑΤΙΔΙΩΝ ΣΕ ΚΛΕΙΣΤΟΥΣ ΑΓΩΓΟΥΣ
THE GAS-PARTICLE TWO PHASE FLOW IN CLOSED, STRAIGHT, HORIZONTAL PIPES IS EXAMINED. IN DERIVING THE EQUATIONS, IT IS ASSUMED THAT A GAS PARTICLE SUSPENSION MAYBE REGARDED AS A CONTINUUM, I.E. THE PARTICLES ARE CONSIDERED TO BE CONTINUOUSLY, BUT NOT NECESSARILY UNIFORMLY, DISTRIBUTED THROUGHOUT THE …
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Heat Transfer Due to Particle-Wall Collisions in Suspension Flows
… clarify the mechanisms of heat transfer in fluid-particle suspension flows. Such flows, including fluidization, are of considerable industrial importance. The present research focuses on heat transfer due to particle-wall collisions, of which three mechanisms can be unambiguously identified: (1) …
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Quenching of particle-gas combustible mixtures using the electric particulate suspension (EPS) method
… referred to as EPS (electric particulate suspension) designed for quenching distance measurement of combustible powder suspensions has been taken from concept to working prototype. The method is validated in both normal gravity and microgravity.</p> <p>Particle suspension concentration …
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Magnetic quartz crystal microbalance
… of a QCM with conducting polymer (polyaniline) suspension in poly(ethylene glycol) was observed to increase with increasing applied DC magnetic field. The change in population of free spins through doping with HCl vapor is reflected in increased frequency-field curve magnitude. The second body …
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Development of a nanoHydroxyapatite-collagen composite scaffold for bone tissue engineering
… technique to produce non-aggregating nano-sized particles (<100 nm) of HA was developed using a novel, dispersant-aided synthesis procedure.<br/><br/>In Chapter 3, the incorporation of the synthesised nHA into the collagen scaffolds was investigated. The optimised technique involved the addition …
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Development and Characterization of Polymeric Nanoparticulate Delivery System for Hydrophillic Drug: Gemcitabine.
… (PLGA:PCL 80:20) nanoparticles were prepared by multiple emulsion-solvent evaporation methodology. An aqueous solution of low viscosity alginate containing gemcitabine was emulsified into 10% solution of dioctyl-sulfosuccinate in dichloro methane (DCM) by sonication. …
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Minimum agitation speed for solid suspension and mixing time in a torispherical -bottomed pharmaceutical stirred tank under different baffling conditions
… speed, NS, required to just suspend solid particles dispersed in water was experimentally determined in this work for a glass-lined type of mixing tank provided with a torispherical bottom and agitated with a retreat-blade impeller under different baffling configurations. Ns for the same …
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Structure-Property Relations in Bubble and Solid Particle Suspensions with Moderate Reynolds Numbers
… properties of inertial bubble and solid particle suspensions have been characterized using numerical simulations. These properties include the hindered settling velocity and microstructure in solid particle suspensions, the scaling of the velocity variance and hydrodynamic diffusivity in …
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Hydrodynamics, dissolution, and mass transfer effects in different dissolution testing apparatuses and laboratory systems
… a number of tools were used, including Particle Image Velocimetry (PIV) and Computational Fluid Dynamics (CFD) to investigated the hydrodynamics of these systems; experimental tablet dissolutions under a number of controlled environments; and a combination of experimental, computational …