Search results for "multiphase flow"

showing 4 items of 24 documents

On the bubbling dynamics of binary mixtures of powders in 2D gas-solid fluidized beds

2012

Abstract The bubbling behavior of fluidized beds has been thoroughly investigated in the last decades by means of several techniques (e.g. X-ray, Inductance, Resistance and Impedance based techniques). In recent years, Digital Image Analysis Techniques have shown their potential for accurate and cost effective measurements. Most of the works related to the experimental analysis of bubble behavior in the field of gas-solid fluidization actually deal with monodispersed particles although almost all industrial equipments operate with mixtures of particles. Among the works available in literature dealing with mixtures of particles having different diameters and/or densities, most of them aim at…

Work (thermodynamics)Settore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciMaterials scienceSteady stateFluidized bed Multiphase flow Bubbles Imaging Binary mixtureBUBBLESGeneral Chemical EngineeringBubbleMultiphase flowMixing (process engineering)Binary numberThermodynamicsBINARY MIXTURESMechanicsPhysics::Fluid DynamicsFluidized bedFluidizationMultiphase flowBubbling fluidized bed
researchProduct

Modelling wet-air oxidation of phenol in a trickle-bed reactor using active carbon as a catalyst

2016

catalytic phenol wet oxidation;active carbon as catalyst;trickle-bed reactors;Euler–Euler model;multiphase flow (CFD);plug flow modelJournal of Chemical Technology and Biotechnology
researchProduct

The Origin of Non-thermal Fluctuations in Multiphase Flow in Porous Media

2021

Core flooding experiments to determine multiphase flow in properties of rock such as relative permeability can show significant fluctuations in terms of pressure, saturation, and electrical conductivity. That is typically not considered in the Darcy scale interpretation but treated as noise. However, in recent years, flow regimes that exhibit spatio-temporal variations in pore scale occupancy related to fluid phase pressure changes have been identified. They are associated with topological changes in the fluid configurations caused by pore-scale instabilities such as snap-off. The common understanding of Darcy-scale flow regimes is that pore-scale phenomena and their signature should have a…

displacementMaterials science010504 meteorology & atmospheric sciencesScale (ratio)fluctuations0208 environmental biotechnologyRELATIVE PERMEABILITYThermal fluctuations02 engineering and technologymultiphaseHAINES JUMPSPRESSUREEnvironmental technology. Sanitary engineering01 natural sciencesPhysics::Fluid DynamicsFLUID DISPLACEMENTFIELDWETTABILITYTD1-10660105 earth and related environmental sciencesWater Science and TechnologyCoalescence (physics)Science & TechnologySTATE 2-PHASE FLOWMultiphase flowfractional flow analysispore scaleMechanicsBreakupCURRENT SPONTANEOUS IMBIBITIONPORE-SCALECapillary number020801 environmental engineeringFlow (mathematics)GASPhysical SciencesWater ResourcesRelative permeabilityFrontiers in Water
researchProduct

EXPERIMENTAL INVESTIGATION OF DILUTE SOLID-LIQUID SUSPENSION IN AN UNBAFFLED STIRRED VESSELS BY A NOVEL PULSED LASER BASED IMAGE ANALYSIS TECHNIQUE

2009

The availability of experimental information on solid distribution inside stirred tanks is a topic of great importance in several industrial applications. The measurement of solid particle distribution in turbulent multiphase flow is not simple and the development of suitable measurement techniques is still in progress. In this work a novel non-intrusive technique for measuring particle concentration fields in solid-liquid systems is employed. The technique makes use of a laser sheet, a high sensitivity digital camera for image acquisition and a Matlab procedure for post-processing the acquired images. Experimental data are here obtained for the case of an unbaffled stirred tank. Stable tor…

lcsh:Computer engineering. Computer hardwareSettore ING-IND/25 - Impianti Chimicilcsh:TP155-156lcsh:TK7885-7895lcsh:Chemical engineeringThe availability of experimental information on solid distribution inside stirred tanks is a topic of great importance in several industrial applications. The measurement of solid particle distribution in turbulent multiphase flow is not simple and the development of suitable measurement techniques is still in progress. In this work a novel non-intrusive technique for measuring particle concentration fields in solid-liquid systems is employed. The technique makes use of a laser sheet a high sensitivity digital camera for image acquisition and a Matlab procedure for post-processing the acquired images. Experimental data are here obtained for the case of an unbaffled stirred tank. Stable toroidal attractors for particles are observed under given circumstances. Their existence consistency and extension depends on particle type fluid properties tank geometry and impeller velocity.Chemical Engineering Transactions
researchProduct