Turbulence Modelling Of Bubbly Flow Using A Two Equation Model
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| Author | : Martin Sommerfeld |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 354 |
| Release | : 2012-12-06 |
| Genre | : Science |
| ISBN | : 3642185401 |
The book summarises the outcom of a priority research programme: 'Analysis, Modelling and Computation of Multiphase Flows'. The results of 24 individual research projects are presented. The main objective of the research programme was to provide a better understanding of the physical basis for multiphase gas-liquid flows as they are found in numerous chemical and biochemical reactors. The research comprises steady and unsteady multiphase flows in three frequently found reactor configurations, namely bubble columns without interiors, airlift loop reactors, and aerated stirred vessels. For this purpose new and improved measurement techniques were developed. From the resulting knowledge and data, new and refined models for describing the underlying physical processes were developed, which were used for the establishment and improvement of analytic as well as numerical methods for predicting multiphase reactors. Thereby, the development, lay-out and scale-up of such processes should be possible on a more reliable basis.
| Author | : Tuncer Cebeci |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 140 |
| Release | : 2003-12-04 |
| Genre | : Science |
| ISBN | : 9783540402886 |
After a brief review of the more popular turbulence models, the author presents and discusses accurate and efficient numerical methods for solving the boundary-layer equations with turbulence models based on algebraic formulas (mixing length, eddy viscosity) or partial-differential transport equations. A computer program employing the Cebeci-Smith model and the k-e model for obtaining the solution of two-dimensional incompressible turbulent flows without separation is discussed in detail and is presented in the accompanying CD.
| Author | : Guan Heng Yeoh |
| Publisher | : Elsevier |
| Total Pages | : 658 |
| Release | : 2009-10-07 |
| Genre | : Computers |
| ISBN | : 0080914896 |
Mixed or multiphase flows of solid/liquid or solid/gas are commonly found in many industrial fields, and their behavior is complex and difficult to predict in many cases. The use of computational fluid dynamics (CFD) has emerged as a powerful tool for the understanding of fluid mechanics in multiphase reactors, which are widely used in the chemical, petroleum, mining, food, beverage and pharmaceutical industries. Computational Techniques for Multiphase Flows enables scientists and engineers to the undertand the basis and application of CFD in muliphase flow, explains how to use the technique, when to use it and how to interpret the results and apply them to improving aplications in process enginering and other multiphase application areas including the pumping, automotive and energy sectors. - Understandable guide to a complex subject - Important in many industries - Ideal for potential users of CFD
| Author | : Grétar Tryggvason |
| Publisher | : Cambridge University Press |
| Total Pages | : 337 |
| Release | : 2011-03-10 |
| Genre | : Computers |
| ISBN | : 1139496700 |
Accurately predicting the behaviour of multiphase flows is a problem of immense industrial and scientific interest. Modern computers can now study the dynamics in great detail and these simulations yield unprecedented insight. This book provides a comprehensive introduction to direct numerical simulations of multiphase flows for researchers and graduate students. After a brief overview of the context and history the authors review the governing equations. A particular emphasis is placed on the 'one-fluid' formulation where a single set of equations is used to describe the entire flow field and interface terms are included as singularity distributions. Several applications are discussed, showing how direct numerical simulations have helped researchers advance both our understanding and our ability to make predictions. The final chapter gives an overview of recent studies of flows with relatively complex physics, such as mass transfer and chemical reactions, solidification and boiling, and includes extensive references to current work.
| Author | : Mamoru Ishii |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 462 |
| Release | : 2006-09-28 |
| Genre | : Technology & Engineering |
| ISBN | : 0387291873 |
This book has been written for graduate students, scientists and engineers who need in-depth theoretical foundations to solve two-phase problems in various technological systems. Based on extensive research experiences focused on the fundamental physics of two-phase flow, the authors present the detailed theoretical foundation of multi-phase flow thermo-fluid dynamics as they apply to a variety of scenarios, including nuclear reactor transient and accident analysis, energy systems, power generation systems and even space propulsion.
| Author | : David C. Wilcox |
| Publisher | : |
| Total Pages | : 522 |
| Release | : 2006 |
| Genre | : Fluid dynamics |
| ISBN | : 9781928729082 |
| Author | : Christophe Morel |
| Publisher | : Springer |
| Total Pages | : 365 |
| Release | : 2015-07-17 |
| Genre | : Technology & Engineering |
| ISBN | : 3319201042 |
This book develops the theoretical foundations of disperse two-phase flows, which are characterized by the existence of bubbles, droplets or solid particles finely dispersed in a carrier fluid, which can be a liquid or a gas. Chapters clarify many difficult subjects, including modeling of the interfacial area concentration. Basic knowledge of the subjects treated in this book is essential to practitioners of Computational Fluid Dynamics for two-phase flows in a variety of industrial and environmental settings. The author provides a complete derivation of the basic equations, followed by more advanced subjects like turbulence equations for the two phases (continuous and disperse) and multi-size particulate flow modeling. As well as theoretical material, readers will discover chapters concerned with closure relations and numerical issues. Many physical models are presented, covering key subjects including heat and mass transfers between phases, interfacial forces and fluid particles coalescence and breakup, amongst others. This book is highly suitable for students in the subject area, but may also be a useful reference text for more advanced scientists and engineers.
| Author | : Andrea Prosperetti |
| Publisher | : Cambridge University Press |
| Total Pages | : 392 |
| Release | : 2009-06-25 |
| Genre | : Mathematics |
| ISBN | : 1139459902 |
Thanks to high-speed computers and advanced algorithms, the important field of modelling multiphase flows is an area of rapid growth. This one-stop account – now in paperback, with corrections from the first printing – is the ideal way to get to grips with this topic, which has significant applications in industry and nature. Each chapter is written by an acknowledged expert and includes extensive references to current research. All of the chapters are essentially independent and so the book can be used for a range of advanced courses and the self-study of specific topics. No other book covers so many topics related to multiphase flow, and it will therefore be warmly welcomed by researchers and graduate students of the subject across engineering, physics, and applied mathematics.
| Author | : Bernard Geurts |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 543 |
| Release | : 2013-06-29 |
| Genre | : Technology & Engineering |
| ISBN | : 9401712638 |
This volume contains the proceedings of the 2001 DLES4 workshop. It describes and discusses state-of-the-art modeling and simulation approaches for complex flows. Fundamental turbulence and modeling issues but also elements from modern numerical analysis are at the heart of this field of interest.
| Author | : Mehrzad Tabatabaian |
| Publisher | : Mercury Learning and Information |
| Total Pages | : 213 |
| Release | : 2015-05-15 |
| Genre | : Computers |
| ISBN | : 1942270623 |
This book can be used as a reference for the topic of turbulence modeling, especially in an engineering modeling and simulation course or as a tool for professionals on practical applications. Turbulent flow modeling has many applications in industry. The relevant numerical methods have advanced to the level that could be used by industry professionals to model many natural turbulent flows with acceptable accuracy. In this book we cover the fundamentals of turbulence, modeling techniques, and algorithms (including RANS) available in COMSOL® as well as providing several modeling examples and instructions for building these models. The companion DVD includes models and figures discussed in the book. eBook Customers: Companion files are available for downloading with order number/proof of purchase by writing to the publisher at [email protected]. Features: •Includes companion DVD with models and figures discussed in the book •Explains the physics and principles of turbulence and provides modeling examples using COMSOL
