Collisions in Particle-laden Gas Flows
Author: Aleksej Y. Varaksin
Publisher:
Published: 2013
Total Pages: 310
ISBN-13: 9781567002867
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Turbulent Particle-Laden Gas Flows
Author: Aleksei Y. Varaksin
Publisher: Springer Science & Business Media
Published: 2007-07-05
Total Pages: 204
ISBN-13: 3540680543
DOWNLOAD EBOOKThis book presents results of experimental and theoretical studies of "gas-solid particles" turbulent two-phase flows. It analyzes the characteristics of heterogeneous flows in channels (pipes), as well as those in the vicinity of the critical points of bodies subjected to flow and in the boundary layer developing on their surface. Coverage also treats in detail problems of physical simulation of turbulent gas flows which carry solid particles.
CFD simulations of particle laden flows: Particle transport and separation
Author: David Schellander
Publisher: Anchor Academic Publishing (aap_verlag)
Published: 2014-02-01
Total Pages: 152
ISBN-13: 3954896710
DOWNLOAD EBOOKThis study presents the basic models for discrete and continuous particle laden flow simulation. An overview of the two main approaches, the Lagrangian discrete particle model and the Eulerian granular phase model is given. Moreover these two approaches are combined to a hybrid model to use the benefits of the discrete and continuous description. This safes computational time and increase the efficiency of particle laden flow simulations. Furthermore the models are extended to poly-disperse particles including a simple agglomeration model based on a population balance equation. Finally the usability of the models is shown at a pneumatic particle transport system including particle strand building and the separation of particles using an industrial cyclone.
Hybrid Particle Laden Flow Modelling
Author: David Schellander
Publisher: GRIN Verlag
Published: 2013-09-20
Total Pages: 155
ISBN-13: 3656501920
DOWNLOAD EBOOKDoctoral Thesis / Dissertation from the year 2013 in the subject Engineering - Mechanical Engineering, grade: 1, University of Linz (Department on Particulate Flow Modelling), language: English, abstract: The numerical hybrid model EUgran+, which is an Eulerian-Eulerian granular phase model extended with models from the Eulerian-Lagrangian model for dense rapid particulate flows, is modified to account for poly-dispersed particle diameter distributions. These modifications include the implementation of I) a new poly-dispersed drag law and of II) new particle boundary conditions distinguishing between sliding and non-sliding particle-wall collisions and III) a new implementation of the population balance equation in the agglomeration model using the Eulerian-Lagrangian approach, referred to as Bus-stop model. Further, the applicability of the EUgran+ model is extended to cover dilute to dense poly-disperse particulate flows. Furthermore, this provides an improvement in the numerical simulation of dust separation and the formation of particle strands in industrial scale cyclones. In this PHD thesis, the EUgran+Poly model is validated at 3 specific cases with different mass loadings: I) poly-dispersed particle conveying in a square pipe with a 90 degree bend at low mass loading (L = 0:00206); II) a particle conveying case in a rectangular pipe with a double-loop at high mass loading (L = 1:5); III) in a vertical pipe the implementation of the agglomeration model is validated. To show the applicability of the presented models a simulation of an industrial cyclone in experimental scale is presented. The validation and application shows that considering a poly-disperse Eulerian-Eulerian granular phase improves the accordance of the simulation results with measurements significantly. Finally, the hybrid model is a good compromise for a computational efficient simulation of particulate transport and separation with different mass loading regimes.
Gas-Particle Flow Simulation with Considering Inter-Particle Collisions
Author: 許志宏
Publisher:
Published: 2005
Total Pages: 162
ISBN-13:
DOWNLOAD EBOOKProcess-Spray
Author: Udo Fritsching
Publisher: Springer
Published: 2016-08-01
Total Pages: 1030
ISBN-13: 3319323709
DOWNLOAD EBOOKThis book describes the latest research on producing functional particles using spray processes. The authors detail micro level elementary processes and phase boundaries, process analysis scaling and modeling, and macro level process functions and particle properties. They include numerical simulations and particulars of experiments for deriving process conditions for particle production.
Particles in Turbulent Flows
Author: Leonid I. Zaichik
Publisher: John Wiley & Sons
Published: 2008-12-04
Total Pages: 318
ISBN-13: 3527626263
DOWNLOAD EBOOKThe only work available to treat the theory of turbulent flow with suspended particles, this book also includes a section on simulation methods, comparing the model results obtained with the PDF method to those obtained with other techniques, such as DNS, LES and RANS. Written by experienced scientists with background in oil and gas processing, this book is applicable to a wide range of industries -- from the petrol industry and industrial chemistry to food and water processing.
Cold Gas Dynamic Spray
Author: Roman Gr. Maev
Publisher: CRC Press
Published: 2016-04-27
Total Pages: 342
ISBN-13: 1466584432
DOWNLOAD EBOOKYour Guide to Advanced Cold Spray TechnologyCold Gas Dynamic Spray centers on cold gas dynamic spray (or cold spray-CS) technology, one of the most versatile thermal spray coating methods in materials engineering, and effectively describes and analyzes the main trends and developments behind the spray (coating) techniques. The book combines theory
Modeling Approaches and Computational Methods for Particle-laden Turbulent Flows
Author: Shankar Subramaniam
Publisher: Academic Press
Published: 2022-10-20
Total Pages: 588
ISBN-13: 0323901344
DOWNLOAD EBOOKModelling Approaches and Computational Methods for Particle-laden Turbulent Flows introduces the principal phenomena observed in applications where turbulence in particle-laden flow is encountered while also analyzing the main methods for analyzing numerically. The book takes a practical approach, providing advice on how to select and apply the correct model or tool by drawing on the latest research. Sections provide scales of particle-laden turbulence and the principal analytical frameworks and computational approaches used to simulate particles in turbulent flow. Each chapter opens with a section on fundamental concepts and theory before describing the applications of the modelling approach or numerical method. Featuring explanations of key concepts, definitions, and fundamental physics and equations, as well as recent research advances and detailed simulation methods, this book is the ideal starting point for students new to this subject, as well as an essential reference for experienced researchers. Provides a comprehensive introduction to the phenomena of particle laden turbulent flow Explains a wide range of numerical methods, including Eulerian-Eulerian, Eulerian-Lagrange, and volume-filtered computation Describes a wide range of innovative applications of these models
Predictive Modeling of Particle-laden Turbulent Flows. Final Report
Author:
Publisher:
Published: 1993
Total Pages: 44
ISBN-13:
DOWNLOAD EBOOKEarlier work of Sinclair and Jackson which treats the laminar flow of gas-solid suspensions is extended to model dilute turbulent flow. The random particle motion, often exceeding the turbulent fluctuations in the gas, is obtained using a model based on kinetic theory of granular materials. A two-equation low Reynolds number turbulence model is, modified to account for the presence of the dilute particle phase. Comparisons of the model predictions with available experimental data for the mean and fluctuating velocity profiles for both phases indicate that the resulting theory captures many of the flow features observed in the pneumatic transport of large particles. The model predictions did not manifest an extreme sensitivity to the degree of inelasticity in the particle-particle collisions for the range of solid loading ratios investigated.
