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Turbulent Particle-Laden Gas Flows

2007-07-05 Science
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Release : 2007-07-05
Genre : Science
Kind : eBook
Book Rating : 543/5 ( reviews)

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Book Synopsis Turbulent Particle-Laden Gas Flows by : Aleksei Y. Varaksin

Download or read book Turbulent Particle-Laden Gas Flows written by Aleksei Y. Varaksin. This book was released on 2007-07-05. Available in PDF, EPUB and Kindle. Book excerpt: This 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.

IUTAM Symposium on Computational Approaches to Multiphase Flow

2007-01-28 Science
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Release : 2007-01-28
Genre : Science
Kind : eBook
Book Rating : 773/5 ( reviews)

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Book Synopsis IUTAM Symposium on Computational Approaches to Multiphase Flow by : S. Balachandar

Download or read book IUTAM Symposium on Computational Approaches to Multiphase Flow written by S. Balachandar. This book was released on 2007-01-28. Available in PDF, EPUB and Kindle. Book excerpt: The book provides a broad overview of the full spectrum of state-of-the-art computational activities in multiphase flow as presented by top practitioners in the field. It starts with well-established approaches and builds up to newer methods. These methods are illustrated with applications to a broad spectrum of problems involving particle dispersion and deposition, turbulence modulation, environmental flows, fluidized beds, bubbly flows, and many others.

Investigation of Particle-laden Turbulent Flow in Free Shear Turbulent Combustion

1983
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Release : 1983
Genre :
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Book Synopsis Investigation of Particle-laden Turbulent Flow in Free Shear Turbulent Combustion by :

Download or read book Investigation of Particle-laden Turbulent Flow in Free Shear Turbulent Combustion written by . This book was released on 1983. Available in PDF, EPUB and Kindle. Book excerpt: Explicit numerical mixed phase simulations are described which couple random gasdynamic motions to inertiallly interactive gas borne particles. Theses simulations are numerical experiments intended to provide data for investigating the interaction between a developing turbulent free shear layer and gas borne solid particles it entrains. The simulations predict most probable distributions of dispersed phase trajectories, standard deviations, and gas phase mixing dynamics which include the concomitant back-influences of the particle phase on the carrier gas flow. Data for refinement of the computational scheme and physical verification are provided by experiment. The experimental evidence is developed in a splitter plate divided, two-channel free shear mixing combustion tube. A variety of particle concentrations and particle size distributions are admitted into non-combusting or combusting flows with selected heat release levels. The computations, in turn, provide guidance on design and selection of new experiments.

Modeling of Gas-to-Particle Mass Transfer in Turbulent Flows

2017-06-29 Science
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Release : 2017-06-29
Genre : Science
Kind : eBook
Book Rating : 849/5 ( reviews)

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Book Synopsis Modeling of Gas-to-Particle Mass Transfer in Turbulent Flows by : Sean C. Garrick

Download or read book Modeling of Gas-to-Particle Mass Transfer in Turbulent Flows written by Sean C. Garrick. This book was released on 2017-06-29. Available in PDF, EPUB and Kindle. Book excerpt: This Brief focuses on the dispersion of high-porosity particles, their entrainment into the vapor-laden stream, and the condensation of vapor onto the particles. The authors begin with a simple/static problem, focusing on transport within the particle. They go on to consider the high-resolution simulation of particles in a turbulent flow and the time-dependent evolution of the fluid-particle fields. Finally, they examine the more computationally-affordable large-eddy simulation of gas-to-particle mass-transfer. The book ends with a summary and challenges as well as directions for the area.

Predictive Modeling of Particle-laden, Turbulent Flows

1992
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Release : 1992
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Book Synopsis Predictive Modeling of Particle-laden, Turbulent Flows by :

Download or read book Predictive Modeling of Particle-laden, Turbulent Flows written by . This book was released on 1992. Available in PDF, EPUB and Kindle. Book excerpt: The successful prediction of particle-laden, turbulent flows relies heavily on the representation of turbulence in the gas phase. Several types of turbulence models for single-phase gas flow have been developed which compare reasonably well with experimental data. In the present work, a low-Reynolds'' k-[epsilon], closure model is chosen to describe the Reynolds stresses associated with gas-phase turbulence. This closure scheme, which involves transport equations for the turbulent kinetic energy and its dissipation rate, is valid in the turbulent core as well as the viscous sublayer. Several versions of the low-Reynolds k-[epsilon] closure are documented in the literature. However, even those models which are similar in theory often differ considerably in their quantitative and qualitative predictions, making the selection of such a model a difficult task. The purpose of this progress report is to document our findings on the performance of ten different versions of the low-Reynolds k-[epsilon] model on predicting fully developed pipe flow. The predictions are compared with the experimental data of Schildknecht, et al. (1979). With the exception of the model put forth by Hoffman (1975), the predictions of all the closures show reasonable agreement for the mean velocity profile. However, important quantitative differences exist for the turbulent kinetic energy profile. In addition, the predicted eddy viscosity profile and the wall-region profile of the turbulent kinetic energy dissipation rate exhibit both quantitative and qualitative differences. An effort to extend the present comparisons to include experimental measurements of other researchers is recommended in order to further evaluate the performance of the models.

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