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Author : Andrew Martin McMahon
Publisher :
ISBN 13 :
Total Pages : 398 pages
Book Rating : 4.:/5 (76 download)
Download or read book Modelling the Flow Behaviour of Gas Bubbles in a Bubble Column written by Andrew Martin McMahon and published by . This book was released on 2009 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wolf-Dieter Deckwer
Publisher : John Wiley & Sons
ISBN 13 :
Total Pages : 564 pages
Book Rating : 4.4/5 (91 download)
Download or read book Bubble Column Reactions written by Wolf-Dieter Deckwer and published by John Wiley & Sons. This book was released on 1992-04-08 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: This technology, though used for many years, has shown great vitality recently and is still in a state of flux. Provides an account of developments up to the present and also an orderly evaluation of literature already published on the subject. Considerable space is devoted to bubble column reactor performance predictions based on mathematical models and the importance of each is explained with practical examples.
Author : Martin Sommerfeld
Publisher : Springer Science & Business Media
ISBN 13 : 3642185401
Total Pages : 354 pages
Book Rating : 4.6/5 (421 download)
Download or read book Bubbly Flows written by Martin Sommerfeld and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 : A.K. Sulayman
Publisher : Lulu.com
ISBN 13 : 1409257118
Total Pages : 280 pages
Book Rating : 4.4/5 (92 download)
Download or read book Energy-based Mathematical Modelling of the Flow Field in Bubble Columns written by A.K. Sulayman and published by Lulu.com. This book was released on 2008 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Asem M. Al Jarrah
Publisher :
ISBN 13 : 9781109872705
Total Pages : 158 pages
Book Rating : 4.8/5 (727 download)
Download or read book Modeling Gas-liquid Bubble Flow and Computational Fluid Dynamics Simulation of Interfacial Area Concentration in Bubble Columns written by Asem M. Al Jarrah and published by . This book was released on 2006 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: It was found that, in a fully developed turbulent flow bubble column, the liquid and gas velocity profiles far from the wall are approximately flat. Close to the wall, the velocity profiles are very sharp. In general, the velocity profiles for the gas and the liquid are similar to the velocity profile of one fluid flow in a pipe.
Author : Bernard Geurts
Publisher : Springer Science & Business Media
ISBN 13 : 9401712638
Total Pages : 543 pages
Book Rating : 4.4/5 (17 download)
Download or read book Direct and Large-Eddy Simulation IV written by Bernard Geurts and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 : Waldo Coetzee
Publisher :
ISBN 13 :
Total Pages : 220 pages
Book Rating : 4.:/5 (858 download)
Download or read book Development of a Computationally Efficient Bubble Column Simulation Approach by Way of Statistical Bubble Micro-flow Modelling written by Waldo Coetzee and published by . This book was released on 2013 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A. K. Sulayman
Publisher :
ISBN 13 : 9789090131719
Total Pages : 270 pages
Book Rating : 4.1/5 (317 download)
Download or read book Energy-based Mathematical Modelling of the Flow Field in Bubble Columns written by A. K. Sulayman and published by . This book was released on 1999 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Subrata Kumar Majumder
Publisher : CRC Press
ISBN 13 : 1351249843
Total Pages : 168 pages
Book Rating : 4.3/5 (512 download)
Download or read book Hydrodynamics and Mass Transfer in Downflow Slurry Bubble Columns written by Subrata Kumar Majumder and published by CRC Press. This book was released on 2019-01-02 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Slurry bubble column reactors are intensively used as a multiphase reactor in the chemical, biochemical, and petrochemical industries for carrying out reactions and mass transfer operations in which a gas, made up of one or several reactive components, comes into contact or reacts with a liquid. This volume describes the hydrodynamics of three-phase gas-liquid-solid flow in a downflow slurry bubble column. The efficiency of the downflow gas interacting system is characterized by the self-entrainment of secondary gas. The book covers the gas entrainment phenomena, gas holdup characteristics, pressure drop, gasliquid mixing characteristics, bubble size distribution, interfacial phenomena, and the mass transfer phenomena in the downflow slurry system. This volume will be useful in chemical and biochemical industries and in industrial research and development sectors, as well as in advanced education courses in this area. The book will be helpful for further understanding the multiphase behavior in gas interacting multiphase systems for research and development. The hydrodynamic and mass transfer characteristics discussed will be useful in the design and installation of the modified slurry bubble column in industry for specific applications.
Author : Mohd Shahimie Selamat
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (953 download)
Download or read book Modelling of Hydrodynamics in Heterogeneous Bubble Column written by Mohd Shahimie Selamat and published by . This book was released on 2010 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The applications of bubble columns are very important as multiphase contactors and reactors in process industry. They are wide and extensively used in chemical, petrochemical and biochemical industries. The advantages of bubble column are low maintenance and operating cost due to the compactness and no moving part. They also have an excellent mass and heat transfer characteristic or high heat and mass transfer coefficients, and high durability of catalyst or packing material. It is important to understand the nature of hydrodynamics and operational parameters to characterize their operation including pressure drop, gas superficial velocity, bubble rise velocity, etc., to do the design and scale-up process. Although experimental methods are available to elucidate the multiphase flow in bubble column by the means of advanced experimental methods i.e. X-ray tomography and laser doppler anemometry, the experimental setup is often expensive to develop. Alternatively, the computational fluid dynamics can be used to evaluate the performance of bubble column at lower cost compared to experimental setup. In this work commercial CFD software, FLUENT 6.3 was employed for modeling of gasliquid flow in a bubble column. Multiphase simulations were performed using an Eulerian-Eulerian two-fluid model and the drag coefficient of spherical and distorted bubbles was modeled using the Tomiyama (1995) and Schiller-Naumann (1935) models. The effect of the void fractions on the drag coefficient was modeled using the correlation by Behzadi (2004). The CFD predictions were compared to the experimental measurement adopted from literature. The CFD predicts the turbulent kinetic energy, gas hold-up and the liquid axial velocity fairly well, although the results seem to suggest that further improvement on the interfacial exchange models and possibly further refinement on the two-fluid modeling approaches are necessary especially for the liquid axial velocity and turbulent kinetic energy. It is clear from the modeling exercise performed in this work that CFD is a great method for modeling the performance of bubble column. Furthermore, the CFD method is certainly less expensive than the experimental characterization studies.
Download or read book Recueil factice progr. et extr. presse concernant l'Hérodienne, l'Apollonide et Polyeucte donnés en 1925 au Théâtre Antique d'Orange written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Esther Iris Viola van den Hengel
Publisher :
ISBN 13 : 9789036520201
Total Pages : 221 pages
Book Rating : 4.5/5 (22 download)
Download or read book Multi-level Modelling of Gas-liquid Two-phase Flow in a Bubble Column written by Esther Iris Viola van den Hengel and published by . This book was released on 2004 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. Clift
Publisher : Courier Corporation
ISBN 13 : 0486317749
Total Pages : 402 pages
Book Rating : 4.4/5 (863 download)
Download or read book Bubbles, Drops, and Particles written by R. Clift and published by Courier Corporation. This book was released on 2013-04-22 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume offers a unified treatment and critical review of the literature related to the fluid dynamics, heat transfer, and mass transfer of single bubbles, drops, and particles. 1978 edition.
Author : Subrata Kumar Majumder
Publisher : Elsevier
ISBN 13 : 012803288X
Total Pages : 464 pages
Book Rating : 4.1/5 (28 download)
Download or read book Hydrodynamics and Transport Processes of Inverse Bubbly Flow written by Subrata Kumar Majumder and published by Elsevier. This book was released on 2016-03-31 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrodynamics and Transport Processes of Inverse Bubbly Flow provides the science and fundamentals behind hydrodynamic characteristics, including flow regimes, gas entrainment, pressure drop, holdup and mixing characteristics, bubble size distribution, and the interfacial area of inverse bubble flow regimes. Special attention is given to mass and heat transfer. This book is an indispensable reference for researchers in academia and industry working in chemical and biochemical engineering. Hydrodynamics and Transport Processes of Inverse Bubbly Flow helps facilitate a better understanding of the phenomena of multiphase flow systems as used in chemical and biochemical industries. - A first book in the market dedicated to the hydrodynamics of inverse bubbly flows - Includes fundamentals of conventional and inverse bubble columns for different hydrodynamic parameters - Includes recommendations for future applications of bubble flows
Author : Weibin Shi
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (115 download)
Download or read book Modelling of Bubbly Flow in Bubble Column Reactors with an Improved Breakup Kernel Accounting for Bubble Shape Variations written by Weibin Shi and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Bubble shapes have been assumed to be spherical in the currently available breakup models such as the one developed by Luo and Svendsen (1996). This particular breakup model has been widely accepted and implemented into CFD modelling of gas-liquid two-phase flows. However, simulation results obtained based on this model usually yield unreliable predictions about the breakage of very small bubbles. The incorporation of bubble shape variation into breakup models has rarely been documented in the study but the bubble shape plays an important role when considering the interactions with the surrounding turbulent eddies in turbulent bubbly flows, especially when the effects of bubble deformation, distortion and bubble internal pressure change are considered during the events of eddy-bubble collision. Thus, the assumption of spherical bubbles seems to be no longer appropriate in reflecting this phenomenon. This study proposes and implements an improved bubble breakup model, which accounts for the variation of bubble shapes when solving the population balance equations for CFD simulation of gas-liquid two-phase flows in bubble columns.
Author : Hugo A. Jakobsen
Publisher : Springer Science & Business Media
ISBN 13 : 3319050923
Total Pages : 1589 pages
Book Rating : 4.3/5 (19 download)
Download or read book Chemical Reactor Modeling written by Hugo A. Jakobsen and published by Springer Science & Business Media. This book was released on 2014-04-02 with total page 1589 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical Reactor Modeling closes the gap between Chemical Reaction Engineering and Fluid Mechanics. The second edition consists of two volumes: Volume 1: Fundamentals. Volume 2: Chemical Engineering Applications In volume 1 most of the fundamental theory is presented. A few numerical model simulation application examples are given to elucidate the link between theory and applications. In volume 2 the chemical reactor equipment to be modeled are described. Several engineering models are introduced and discussed. A survey of the frequently used numerical methods, algorithms and schemes is provided. A few practical engineering applications of the modeling tools are presented and discussed. The working principles of several experimental techniques employed in order to get data for model validation are outlined. The monograph is based on lectures regularly taught in the fourth and fifth years graduate courses in transport phenomena and chemical reactor modeling and in a post graduate course in modern reactor modeling at the Norwegian University of Science and Technology, Department of Chemical Engineering, Trondheim, Norway. The objective of the book is to present the fundamentals of the single-fluid and multi-fluid models for the analysis of single and multiphase reactive flows in chemical reactors with a chemical reactor engineering rather than mathematical bias. Organized into 13 chapters, it combines theoretical aspects and practical applications and covers some of the recent research in several areas of chemical reactor engineering. This book contains a survey of the modern literature in the field of chemical reactor modeling.
Author : Joseph Wakim
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (143 download)
Download or read book Modeling, Simulation & Analysis of the Flow in a Bubble Column written by Joseph Wakim and published by . This book was released on 2024 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding multiphase flows in bubble columns is crucial for various engineering applications. This study models a rectangular bubble column of laminar flow with a height of 2 meters and a width of 0.5 meters, where the inlet velocity of air is set at 3.3 mm/s. The simulations were done on Ansys Fluent using the mixture model, Volume of Fluid model and Eulerian model for two different numerical schemes, namely the first order upwind and the quadratic upstream interpolation for convective kinetics schemes. The mesh independence study demonstrated that in 2D simulations, mesh independence was achieved exclusively using the Eulerian model indicating that the Eulerian model is the most effective for simulating bubbly flow. Furthermore, when applying finer meshes in 3D simulations, the results closely aligned with the 2D simulations, supporting the validity of a 2D approach in the case of such flat bubble column. Additionally, finer meshes show thinner bubble swarms, particularly at the inlet. This study also investigated the impact of various parameters on bubble flow dynamics. It was found that the air inlet velocity, bubble sizes, and the properties of the working fluids significantly influenced the results. Specifically, as the air inlet velocity increased, the air volume fraction also increased. Conversely, increasing bubblesizes led to a decrease in both the air volume fraction and the water velocity, due to a reduced surface area to volume ratio. Moreover, changes in the working fluids showed that viscosity and density greatly affect the bubbly flow within the bubble column, highlighting the sensitivity of the system to these fluid properties.
