Computational Fluid Dynamics Cfd To Simulate Slug Flow In Horizontal Pipeline And Annular Pipe
DOWNLOAD
Download Computational Fluid Dynamics Cfd To Simulate Slug Flow In Horizontal Pipeline And Annular Pipe PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Computational Fluid Dynamics Cfd To Simulate Slug Flow In Horizontal Pipeline And Annular Pipe book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Computational Fluid Dynamics Cfd To Simulate Slug Flow In Horizontal Pipeline And Annular Pipe
DOWNLOAD
Author : Hassn Hadia
language : en
Publisher:
Release Date : 2018
Computational Fluid Dynamics Cfd To Simulate Slug Flow In Horizontal Pipeline And Annular Pipe written by Hassn Hadia and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Slug flow can emerge as a factor in several industrial processes, especially in the oil and gas (O&G) industry. However, because of the complications that are inherent in multiphase flow, finding or developing a viable analysis tool has thus far proven elusive. For the past few decades, computational fluid dynamics (CFD) has served as the preferred approach in the flow analysis of single phase flow, yet it is only now beginning to be used in multiphase flow. Therefore, if CFD is to be adopted on a larger scale in the (O&G) industry, it is imperative that we first explore the wide variety of models currently existing in the commercial realm. This thesis investigates the commercial CFD package ANSYS 16.2 analysis of (air-water slug flow) and (water-sand slurry flow) inside a horizontal pipe (2-15 m long with a 0.05-0.059 m internal diameter) and an annular pipe (2- 4.5 m long, 0.02- 0.088 m inner and 0.04-0.12 m outer diameter). A range of two-phase air/water flow simulations is carried out using the Eulerian model with the Reynolds Stress Model (RSM), and the volume of fluid (VOF) model with the Shear-Stress-Transport (SST) model option of turbulence. The aim is to simulate a range of fluid velocities between 1.66 and 7 m/s and a range of gas velocities between 0.55 and 11 m/s. Additional investigations include comparing CFD predictions along with experimental measurements in the literature and performing sensitivity studies. In the present work, the impact from fluid-structure interaction (FSI) is demonstrated by using a 2-way coupling in ANSYS, effectively joining CFD and structural analysis. At the same time, stress and pressure changes are measured, along with the deformational structural response arising from unsteady multiphase flow. It is hoped that the outcome of this study will assist engineers and researchers in making better decisions in terms of operation, design, and sizing of two-phase flow systems, as these systems have broad and promising applications in subsea (O&G) pipelines.
Cfd Simulation Of Two Phase Gas Non Newtonian Fluid Flows In Pipes
DOWNLOAD
Author : Miguel Andrés Mauricio Daza Gómez
language : en
Publisher:
Release Date : 2018
Cfd Simulation Of Two Phase Gas Non Newtonian Fluid Flows In Pipes written by Miguel Andrés Mauricio Daza Gómez and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
The multiphase flow has always been a major concern since it is encountered in many industrial processes that are crucial. Gas/non-Newtonian two-phase flow is found in the upstream of the petroleum industry, where slug flow is the most common flow pattern. This flow pattern has complex hydrodynamics which are crucial to study and evaluate. This study assessed the two-phase gas/non-Newtonian fluid flow in different configurations of pipes. The model was developed using Computational Fluid Dynamics (CFD) with an orthogonal mesh to evaluate the behavior of the slug dynamics in the different configurations. The model Volume of Fluid (VOF) was used to estimate and predict the most important parameters: pressure drop, slug frequency and length. First the model was validated with experimental data found in literature in a horizontal 9 m long glass pipe, with an inner diameter of 22.8 mm. The validation was made with CarboxyMethyl Cellulose CMC-water solutions as test fluids...
2d Cfd Modelling Of The Drift Flux Velocity In Two Phase Air Newtonian Slug Flow Pattern Flow Along Horizontal Pipelines
DOWNLOAD
Author : Mariana Alarcón López
language : en
Publisher:
Release Date : 2018*
2d Cfd Modelling Of The Drift Flux Velocity In Two Phase Air Newtonian Slug Flow Pattern Flow Along Horizontal Pipelines written by Mariana Alarcón López and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018* with categories.
The present study analyzes the drift velocity of a synthetic oil in horizontal two-phase slug flow pipelines, by evaluating the effect of some physical properties, such as density and dynamic viscosity, and pipeline characteristics, such as the length of the pipe, due to its applications in various industries as in the O&G industry processes. This was achieved by using Computational Fluid Dynamics (CFD) tool approaches. The STAR-CCM+ software was utilized to simulate a half circular pipeline with a symmetry plane in a 2D mesh model, analyzing three different turbulence models. This model was fixed with a mesh independence test to obtain an accurate number of cells for the grid. The CFD results were compared with the experimental data gathered by the Tulsa University Fluid Flow Project (2018) research group. The drift velocity results achieved with a reasonable accuracy level in the pipeline, with error values under 15%. A dimensionless analysis for the experimental and CFD Reynolds numbers was done, concluding that the drift velocity within the pipe is dominated by viscous forces that overcome the inertial forces.
Computational Fluid Dynamics
DOWNLOAD
Author : Jiyuan Tu
language : en
Publisher: Butterworth-Heinemann
Release Date : 2018-02-06
Computational Fluid Dynamics written by Jiyuan Tu and has been published by Butterworth-Heinemann this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-02-06 with Technology & Engineering categories.
Computational Fluid Dynamics: A Practical Approach, Third Edition, is an introduction to CFD fundamentals and commercial CFD software to solve engineering problems. The book is designed for a wide variety of engineering students new to CFD, and for practicing engineers learning CFD for the first time. Combining an appropriate level of mathematical background, worked examples, computer screen shots, and step-by-step processes, this book walks the reader through modeling and computing, as well as interpreting CFD results. This new edition has been updated throughout, with new content and improved figures, examples and problems. Includes a new chapter on practical guidelines for mesh generation Provides full coverage of high-pressure fluid dynamics and the meshless approach to provide a broader overview of the application areas where CFD can be used Includes online resources with a new bonus chapter featuring detailed case studies and the latest developments in CFD
Slurry Flow
DOWNLOAD
Author : C A Shook
language : en
Publisher: Elsevier
Release Date : 2013-10-22
Slurry Flow written by C A Shook and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-22 with Science categories.
Slurry Flow: Principles and Practice describes the basic concepts and methods for understanding and designing slurry flow systems, in-plan installations, and long-distance transportation systems. The goal of this book is to enable the design or plant engineer to derive the maximum benefit from a limited amount of test data and to generalize operating experience to new situations. Design procedures are described in detail and are accompanied by illustrative examples needed by engineers with little or no previous experience in slurry transport. The technical literature in this field is extensive: this book facilitates its use by surveying current research results and providing explanations of mechanistic flow models. This discussion of background scientific principles helps the practitioner to better interpret test data, select pumps, specify materials of construction, and choose measuring devises for slurry transport systems. The extensive range of topics covered in Slurry Flow: Principles and practice includes slurry rheology, homogeneous and heterogeneous slurry flow principles, wear mechanisms, pumping equipment, instrumentation, and operating aspects.
Experimental Investigation And Cfd Simulation Of Slug Flow In Horizontal Channels
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2007
Experimental Investigation And Cfd Simulation Of Slug Flow In Horizontal Channels written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Computational Fluid Dynamics For Engineers
DOWNLOAD
Author : Bengt Andersson
language : en
Publisher: Cambridge University Press
Release Date : 2011-12-22
Computational Fluid Dynamics For Engineers written by Bengt Andersson and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-12-22 with Technology & Engineering categories.
Computational fluid dynamics, CFD, has become an indispensable tool for many engineers. This book gives an introduction to CFD simulations of turbulence, mixing, reaction, combustion and multiphase flows. The emphasis on understanding the physics of these flows helps the engineer to select appropriate models to obtain reliable simulations. Besides presenting the equations involved, the basics and limitations of the models are explained and discussed. The book combined with tutorials, project and power-point lecture notes (all available for download) forms a complete course. The reader is given hands-on experience of drawing, meshing and simulation. The tutorials cover flow and reactions inside a porous catalyst, combustion in turbulent non-premixed flow, and multiphase simulation of evaporation spray respectively. The project deals with design of an industrial-scale selective catalytic reduction process and allows the reader to explore various design improvements and apply best practice guidelines in the CFD simulations.
Experimental Investigation And Cfd Simulation Of Slug Flow In Horizontal Channels
DOWNLOAD
Author : Horst-Michael Prasser
language : en
Publisher:
Release Date : 2010
Experimental Investigation And Cfd Simulation Of Slug Flow In Horizontal Channels written by Horst-Michael Prasser and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Experimental And Cfd Modelling Of The Drift Flux In Two Phase Air Non Newtonian Slug Flow Pattern Flow Along Horizontal And Inclined Pipelines
DOWNLOAD
Author : Paula Daniela Pico Viviescas
language : en
Publisher:
Release Date : 2018
Experimental And Cfd Modelling Of The Drift Flux In Two Phase Air Non Newtonian Slug Flow Pattern Flow Along Horizontal And Inclined Pipelines written by Paula Daniela Pico Viviescas and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
The present study analyzes the influence of the physical properties of Newtonian and non-Newtonian fluids, such as density, effective viscosity and surface tension, as well as operational parameters of the piping, such as diameter, length and inclination angle on the drift velocity for two-phase gas-liquid flow. This study comprises experimental and Computational Fluid Dynamic (CFD) approaches. The simulation model was calibrated through a mesh independence test, which considered experimental and literature data as benchmark, and was divided in three sections based on the viscosity of the fluid and the positioning of the pipeline. The results obtained through the CFD model showed good agreement with the experimental data gathered for the present study, keeping the experimental deviations under 30% for all cases. The relationship between the Froude number (Fr) and Viscosity number (Nvis) was studied and an inverse exponential pattern was found for all the parameters and fluids tested. Additionally, the relation observed between Fr and Nvis for a horizontal setting on Newtonian fluids had good resemblance with the models proposed in literature, predicting accurately a decreasing behavior of the drift velocity for increasing viscosity. The data gathered for all fluids on the drift velocity's behavior against operational parameters showed the influence of the governing forces for each case based on a dimensionless analysis using Etvos (Eo) and Reynolds (Re) numbers. For dominant capillary or viscous forces, the drift velocity changed with the variation of these parameters. However, it was found that for dominant inertial and gravitational forces, the drift velocity maintained a constant value regardless of the operational settings. Finally, it was observed that the rheological nature of the non-Newtonian fluids has a significant influence on the drift velocity's behavior, deviating its patterns from the Newtonian fluids as the effective viscosity changes.
A Study Of Taylor Bubbles In Vertical And Inclined Slug Flow Using Multiphase Cfd With Level Set
DOWNLOAD
Author : Enrique Lizarraga-García
language : en
Publisher:
Release Date : 2016
A Study Of Taylor Bubbles In Vertical And Inclined Slug Flow Using Multiphase Cfd With Level Set written by Enrique Lizarraga-García and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Slug flow commonly occurs in gas and oil systems. Current predictive methods are based on mechanistic models, which require the use of closure relations to complement the conservation equations to predict integral flow parameters such as liquid holdup (or void fraction) and pressure gradient. These closure relations are typically developed either empirically or from semi-empirical models assuming idealized geometry of the interface, thus they carry the highest uncertainties in the mechanistic models. In this work, sensitivity analysis has determined that Taylor bubble velocity in slug flow is one such closure relation which significantly affects the calculation of these parameters. The main objective is to develop a unified higher-fidelity closure relation for Taylor bubble velocity. Here, we employ a novel approach to overcome the experimental limitations: validated 3D Computational Multiphase Fluid Dynamics (CMFD) with Interface Tracking Methods (ITMs) where the interface is tracked with a Level-Set method implemented in the commercial code TransAT®. In the literature, the Taylor bubble velocity is modeled based on two different contributions: (i) the drift velocity, i.e., the velocity of propagation of a Taylor bubble in stagnant liquid, and (ii) the liquid flow contribution. Here, we first analyze the dynamics of Taylor bubbles in stagnant liquid by generating a large numerical database that covers the most ample range of fluid properties and pipe inclination angles explored to date (Eo [epsilon] [10, 700], Mo [epsilon] [1 . 10-6, 5 . 103], and [theta] [epsilon] [0°, 90°]). A unified Taylor bubble velocity correlation, proposed for use as a slug flow closure relation in the mechanistic model, is derived from that database. The new correlation predicts the numerical database with 8.6% absolute average relative error and a coefficient of determination R2 = 0.97, and other available experimental data with 13.0% absolute average relative error and R2 = 0.84. By comparison, the second best correlation reports absolute average relative errors of 120% and 37%, and R2 = 0.40 and 0.17, respectively. Furthermore, two key assumptions made in the CMFD simulations are justified with simulations and experiments: (i) the lubricating liquid film formed above the bubble as the pipe inclines with respect to the horizontal does not breakup, i.e., the gas phase never touches the pipe wall and triple line is not formed; and (ii) the Taylor bubble length does not affect its dynamics in inclined pipes. To verify the robustness of the first assumption, the gravity-induced film drainage is analytically modeled and experimentally validated. From this model, a criterion to avoid film breakup is obtained, which holds in the simulations performed. The second assumption is validated with both experiments and simulations. Finally, simulations of Taylor bubbles in upward and downward fluid flow in vertical and inclined pipes are performed, from where it is concluded that an improvement of the current velocity prediction models is needed. In particular, Taylor bubbles in vertical downward flow where the bubble becomes non-axisymmetric at high enough liquid flows are remarkably ill-predicted by current correlations.