Determination Of Cohesive And Normal Stresses And Simulation Of Fluidization Using Kinetic Theory PDF Download
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Author | : Rukmini Bezbaruah |
Publisher | : |
Total Pages | : 180 |
Release | : 1991 |
Genre | : |
ISBN | : |
Download Determination of Cohesive and Normal Stresses and Simulation of Fluidization Using Kinetic Theory Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 101 |
Release | : 1991 |
Genre | : |
ISBN | : |
Download Determination of Cohesive and Normal Stresses and Simulation of Fluidization Using Kinetic Theory Book in PDF, ePub and Kindle
The general objective of this study is focused on the solid stresses involved in gas-solid flow. These stresses are generally included in the momentum conservation equations, essentially for stability and to prevent particles from collapsing to unreasonably low values of gas volume fraction. The first half of this work undertakes the measurement of the stresses in various powders by direct means, while the second part uses a newly developed kinetic theory constitutive equation for stress to predict the flow and also the solids viscosity in a CFB. The cohesive or tensile stress found to exist in some classes of powders is measured using a Cohetester, based on which a cohesive force model is derived, which is sensitive to the characteristic properties of the powder material. The normal stress is measured using a Consolidometer, and the powder solids modulus is obtained as a function of the volume fraction. The solids modulus is seen to vary with particle size and particle type, with the smaller size particles being more compressible. The simulation of flow in the CFB using Gidaspow's (1991) extension of Ding's (1990) kinetic theory model to dilute phase flow, predicts realistic values of solids viscosity that are comparable to viscosities obtained experimentally by Miller (1991). However, to obtain a match between the two the value of the restitution coefficient has to be close to unity. The flow behavior showed periodic oscillations of flow (turbulence) as seen in a real system. 26 refs., 51 figs., 1 tab.
Author | : |
Publisher | : |
Total Pages | : 312 |
Release | : 1992 |
Genre | : Aeronautics |
ISBN | : |
Download Scientific and Technical Aerospace Reports Book in PDF, ePub and Kindle
Author | : Dimitri Gidaspow |
Publisher | : Academic Press |
Total Pages | : 490 |
Release | : 1994-01-18 |
Genre | : Science |
ISBN | : 0122824709 |
Download Multiphase Flow and Fluidization Book in PDF, ePub and Kindle
It clarifies many physical concepts (such as particulate viscosity and solids pressure) and introduces the new dependent variable - the volume fraction of the dispersed phase. Exercises are provided for further study, and lead into applications not covered in the text itself
Author | : |
Publisher | : |
Total Pages | : 488 |
Release | : 1992-02 |
Genre | : Power resources |
ISBN | : |
Download Energy Research Abstracts Book in PDF, ePub and Kindle
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Publisher | : |
Total Pages | : 580 |
Release | : 1992 |
Genre | : Science |
ISBN | : |
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Publisher | : |
Total Pages | : 1400 |
Release | : 1992 |
Genre | : Government reports announcements & index |
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Author | : Huilin Lu |
Publisher | : |
Total Pages | : 0 |
Release | : 2021 |
Genre | : |
ISBN | : 9789811615597 |
Download Computational Fluid Dynamics and the Theory of Fluidization Book in PDF, ePub and Kindle
This book is for engineers and students to solve issues concerning the fluidized bed systems. It presents an analysis that focuses directly on the problem of predicting the fluid dynamic behavior which empirical data is limited or unavailable. The second objective is to provide a treatment of computational fluidization dynamics that is readily accessible to the non-specialist. The approach adopted in this book, starting with the formulation of predictive expressions for the basic conservation equations for mass and momentum using kinetic theory of granular flow. The analyses presented in this book represent a body of simulations and experiments research that has appeared in numerous publications over the last 20 years. This material helps to form the basis for university course modules in engineering and applied science at undergraduate and graduate level, as well as focused, post-experienced courses for the process, and allied industries.
Author | : |
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Total Pages | : 884 |
Release | : 2005 |
Genre | : Dissertations, Academic |
ISBN | : |
Download Dissertation Abstracts International Book in PDF, ePub and Kindle
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Publisher | : |
Total Pages | : 316 |
Release | : 2007 |
Genre | : Granular materials |
ISBN | : |
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