Linear Stability Analysis And Direct Numerical Simulation Of A Miscible Two Fluid Channel Flow PDF Download
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Author | : Siina Ilona Haapanen |
Publisher | : |
Total Pages | : 364 |
Release | : 2008 |
Genre | : |
ISBN | : |
Download Linear Stability Analysis and Direct Numerical Simulation of a Miscible Two-fluid Channel Flow Book in PDF, ePub and Kindle
Author | : Martín López de Bertodano |
Publisher | : Springer |
Total Pages | : 367 |
Release | : 2016-11-09 |
Genre | : Technology & Engineering |
ISBN | : 3319449680 |
Download Two-Fluid Model Stability, Simulation and Chaos Book in PDF, ePub and Kindle
This book addresses the linear and nonlinear two-phase stability of the one-dimensional Two-Fluid Model (TFM) material waves and the numerical methods used to solve it. The TFM fluid dynamic stability is a problem that remains open since its inception more than forty years ago. The difficulty is formidable because it involves the combined challenges of two-phase topological structure and turbulence, both nonlinear phenomena. The one dimensional approach permits the separation of the former from the latter.The authors first analyze the kinematic and Kelvin-Helmholtz instabilities with the simplified one-dimensional Fixed-Flux Model (FFM). They then analyze the density wave instability with the well-known Drift-Flux Model. They demonstrate that the Fixed-Flux and Drift-Flux assumptions are two complementary TFM simplifications that address two-phase local and global linear instabilities separately. Furthermore, they demonstrate with a well-posed FFM and a DFM two cases of nonlinear two-phase behavior that are chaotic and Lyapunov stable. On the practical side, they also assess the regularization of an ill-posed one-dimensional TFM industrial code. Furthermore, the one-dimensional stability analyses are applied to obtain well-posed CFD TFMs that are either stable (RANS) or Lyapunov stable (URANS), with the focus on numerical convergence.
Author | : |
Publisher | : |
Total Pages | : 132 |
Release | : 1981 |
Genre | : |
ISBN | : |
Download Advanced Stability Analysis for Laminar Flow Control Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 400 |
Release | : 1948 |
Genre | : Mechanics, Applied |
ISBN | : |
Download Applied mechanics reviews Book in PDF, ePub and Kindle
Author | : Bhadraiah Vempati |
Publisher | : |
Total Pages | : 116 |
Release | : 2007 |
Genre | : |
ISBN | : 9780549277460 |
Download Numerical Simulation of Immiscible Liquid-liquid Flows in Pipe and Inclined Channel Book in PDF, ePub and Kindle
Immiscible multi-fluid flows are of great industrial importance. The nature of such flows and their stability is the topic of study here. Results of the present study has are prescribed in two parts. First part discusses the two layer fluid flows in pipe geometry while the second part looks in the properties of two layer fluid flows in inclined channel geometry.
Author | : Daniel D. Joseph |
Publisher | : Springer |
Total Pages | : 508 |
Release | : 1992-12-18 |
Genre | : Mathematics |
ISBN | : |
Download Fundamentals of Two-Fluid Dynamics Book in PDF, ePub and Kindle
Two-fluid dynamics is a challenging subject rich in physics and prac tical applications. Many of the most interesting problems are tied to the loss of stability which is realized in preferential positioning and shaping of the interface, so that interfacial stability is a major player in this drama. Typically, solutions of equations governing the dynamics of two fluids are not uniquely determined by the boundary data and different configurations of flow are compatible with the same data. This is one reason why stability studies are important; we need to know which of the possible solutions are stable to predict what might be observed. When we started our studies in the early 1980's, it was not at all evident that stability theory could actu ally work in the hostile environment of pervasive nonuniqueness. We were pleasantly surprised, even astounded, by the extent to which it does work. There are many simple solutions, called basic flows, which are never stable, but we may always compute growth rates and determine the wavelength and frequency of the unstable mode which grows the fastest. This proce dure appears to work well even in deeply nonlinear regimes where linear theory is not strictly valid, just as Lord Rayleigh showed long ago in his calculation of the size of drops resulting from capillary-induced pinch-off of an inviscid jet.
Author | : Uday S. Dixit |
Publisher | : Springer Nature |
Total Pages | : 279 |
Release | : 2020-07-23 |
Genre | : Technology & Engineering |
ISBN | : 9811557128 |
Download Mechanical Sciences Book in PDF, ePub and Kindle
This book consists of review articles by experts on recent developments in mechanical engineering sciences. The book has been composed to commemorate the Silver Jubilee of the Mechanical Engineering Department, Indian Institute of Technology Guwahati. It includes articles on modern mechanical sciences subjects of advanced simulation techniques and molecular dynamics, microfluidics and microfluidic devices, energy systems, intelligent fabrication, microscale manufacturing, smart materials, computational techniques, robotics and their allied fields. It presents the upcoming and emerging areas in mechanical sciences which will help in formulation of new courses and updating existing curricula. This book will help the academicians and policy makers in the field of engineering education to chart out the desired path for the development of technical education.
Author | : Daniel D. Joseph |
Publisher | : Springer |
Total Pages | : 494 |
Release | : 1992-12-18 |
Genre | : Mathematics |
ISBN | : 9780387979106 |
Download Fundamentals of Two-Fluid Dynamics Book in PDF, ePub and Kindle
Two-fluid dynamics is a challenging subject rich in physics and prac tical applications. Many of the most interesting problems are tied to the loss of stability which is realized in preferential positioning and shaping of the interface, so that interfacial stability is a major player in this drama. Typically, solutions of equations governing the dynamics of two fluids are not uniquely determined by the boundary data and different configurations of flow are compatible with the same data. This is one reason why stability studies are important; we need to know which of the possible solutions are stable to predict what might be observed. When we started our studies in the early 1980's, it was not at all evident that stability theory could actu ally work in the hostile environment of pervasive nonuniqueness. We were pleasantly surprised, even astounded, by the extent to which it does work. There are many simple solutions, called basic flows, which are never stable, but we may always compute growth rates and determine the wavelength and frequency of the unstable mode which grows the fastest. This proce dure appears to work well even in deeply nonlinear regimes where linear theory is not strictly valid, just as Lord Rayleigh showed long ago in his calculation of the size of drops resulting from capillary-induced pinch-off of an inviscid jet.
Author | : National Aeronautics and Space Adm Nasa |
Publisher | : Independently Published |
Total Pages | : 28 |
Release | : 2018-10-22 |
Genre | : Science |
ISBN | : 9781729072448 |
Download Low Reynolds Number Two-Equation Modeling of Turbulent Flows Book in PDF, ePub and Kindle
A k-epsilon model that accounts for viscous and wall effects is presented. The proposed formulation does not contain the local wall distance thereby making very simple the application to complex geometries. The formulation is based on an existing k-epsilon model that proved to fit very well with the results of direct numerical simulation. The new form is compared with nine different two-equation models and with direct numerical simulation for a fully developed channel flow at Re = 3300. The simple flow configuration allows a comparison free from numerical inaccuracies. The computed results prove that few of the considered forms exhibit a satisfactory agreement with the channel flow data. The model shows an improvement with respect to the existing formulations. Michelassi, V. and Shih, T.-H. Glenn Research Center NASA ORDER C-99066-G...
Author | : Julien Hoessler |
Publisher | : |
Total Pages | : |
Release | : 2011 |
Genre | : |
ISBN | : |
Download Direct Numerical Simulations and Stability Analysis of Vortex-dominated Flows Around Complex Geometries Book in PDF, ePub and Kindle