Download or read book Measurement of Particle Dispersion in Turbulent Pipe Flow written by Gylfi Arnason and published by . This book was released on 1982 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Motions of Particles in Turbulent Flows written by Shao Lin Lee and published by . This book was released on 1980 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Interaction Between Dispersed Particles and Fluid Turbulence in a Flat plate Turbulent Boundary Layer in Air written by Christopher Buergin Rogers and published by . This book was released on 1989 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transport Processes of Particles in Dilute Suspensions in Turbulent Water Flow Phase II written by and published by . This book was released on 1972 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measuring Particle Response to Fluid Turbulence in the Particle Lagrangian Reference Frame written by Steven B. Ainley and published by . This book was released on 1997 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method for emulating the motion of a particle with a time constant on the order of the fluid turbulent time scales was investigated for a turbulent channel flow. This method was used to measure the fluid velocity in the reference frame of the moving particle (particle-Lagrangian reference frame). The objectives were to calculate the fluid and particle turbulence statistics along the particle path and to develop a model which predicts the dispersion with only the knowledge of the fluid turbulence and the particle parameters. The particles were assumed to have much greater density than the surrounding fluid and the Stokes flow around the particle was assumed. The path of a solid particle was emulated by mounting a two component laser velocimeter (LV) system on a two-dimensional traverse system. The fluid velocity in two components was measured by the LV and then sent to the computer. The instantaneous acceleration that a real particle would undergo in each direction was calculated using the measured fluid velocity and the Stokes transport equation. When the traverse had reached its new desired velocity (5 ms), the fluid velocity was measured and the sequence repeated. This cycle required 10 ms to complete compared to an estimated Kolmogorov time scale of 200 msec. Fluid and particle velocity autocorrelation functions, energy spectra, and turbulence intensity measurements were taken along a particle path for particles with Stokes numbers ranging from 0.5 to 3.5 and drift velocities ranging from 0% to 10% of the mean centerline velocity. The Reynolds numbers (based on centerline velocity and channel half-width) were 3300 and 6600. The fluid velocity field observed from the particle-Lagrangian reference frame was weakly affected by the particle time constant but was strongly affected by the drift velocity. The particle response, however, was strongly affected by the particle time constant, as would be expected. A model was developed to predict particle dispersion. This model compared favorably to the measured particle dispersion especially for Stokes numbers near unity and small drift velocities.
Download or read book Transport Processes of Particles in Dilute Suspensions in Turbulent Water Flow Phase III written by and published by . This book was released on 1974 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Particle Laden Flow written by Bernard Geurts and published by Springer Science & Business Media. This book was released on 2007-10-20 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains a selection of the papers that were presented at the EUROMECH colloquium on particle-laden flow held at the University of Twente in 2006. The multiscale nature of this challenging field motivated the calling of the colloquium and reflects the central importance that the dispersion of particles in a flow has in various geophysical and environmental problems. The spreading of aerosols and soot in the air, the growth and dispersion of plankton blooms in seas and oceans, or the transport of sediment in rivers, estuaries and coastal regions are striking examples.
Download or read book Multiphase Flow Handbook Second Edition written by Efstathios Michaelides and published by CRC Press. This book was released on 2016-10-26 with total page 1559 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Multiphase Flow Handbook, Second Edition is a thoroughly updated and reorganized revision of the late Clayton Crowe’s work, and provides a detailed look at the basic concepts and the wide range of applications in this important area of thermal/fluids engineering. Revised by the new editors, Efstathios E. (Stathis) Michaelides and John D. Schwarzkopf, the new Second Edition begins with two chapters covering fundamental concepts and methods that pertain to all the types and applications of multiphase flow. The remaining chapters cover the applications and engineering systems that are relevant to all the types of multiphase flow and heat transfer. The twenty-one chapters and several sections of the book include the basic science as well as the contemporary engineering and technological applications of multiphase flow in a comprehensive way that is easy to follow and be understood. The editors created a common set of nomenclature that is used throughout the book, allowing readers to easily compare fundamental theory with currently developing concepts and applications. With contributed chapters from sixty-two leading experts around the world, the Multiphase Flow Handbook, Second Edition is an essential reference for all researchers, academics and engineers working with complex thermal and fluid systems.
Download or read book Stochastic Lagrangian Modeling for Large Eddy Simulation of Dispersed Turbulent Two Phase Flows written by Abdallah Sofiane Berrouk and published by Bentham Science Publishers. This book was released on 2011 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the dispersion and the deposition of inertial particles convected by turbulent flows is a domain of research of considerable industrial interest. Inertial particle transport and dispersion are encountered in a wide range of flow configurations, whether they are of industrial or environmental character. Conventional models for turbulent dispersed flows do not appear capable of meeting the growing needs of chemical, mechanical and petroleum industries in this regard and physical environment testing is prohibitive. Direct Numerical Simulation (DNS) and Large Eddy Simulation (LES) ha.
Download or read book Particles in Turbulent Flows written by Leonid I. Zaichik and published by John Wiley & Sons. This book was released on 2008-12-04 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: The only work available to treat the theory of turbulent flow with suspended particles, this book also includes a section on simulation methods, comparing the model results obtained with the PDF method to those obtained with other techniques, such as DNS, LES and RANS. Written by experienced scientists with background in oil and gas processing, this book is applicable to a wide range of industries -- from the petrol industry and industrial chemistry to food and water processing.
Download or read book Dispersion and Deposition of Heavy Particles in Turbulent Flows written by Chunyu Jin and published by . This book was released on 2012 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Particle Dispersion in Inhomogeneous Turbulent Flow written by M. Veenman and published by . This book was released on 2001 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: A DNS code based on a spectral-element method is developed. The code is applied to calculate Eulerian space-time velocity correlation functions and to study the possibility to describe the dispersion of particles by a Langevin equation for particle velocity. The preliminary results indicate that it is possible to derive the damping coefficients from the correlation functions.
Download or read book Progress In Astronautics and Aeronautics written by Herman Branover and published by AIAA. This book was released on 1998 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Direct and Large Eddy Simulation I written by Peter R. Voke and published by Springer Science & Business Media. This book was released on 1994-10-31 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is a truism that turbulence is an unsolved problem, whether in scientific, engin eering or geophysical terms. It is strange that this remains largely the case even though we now know how to solve directly, with the help of sufficiently large and powerful computers, accurate approximations to the equations that govern tur bulent flows. The problem lies not with our numerical approximations but with the size of the computational task and the complexity of the solutions we gen erate, which match the complexity of real turbulence precisely in so far as the computations mimic the real flows. The fact that we can now solve some turbu lence in this limited sense is nevertheless an enormous step towards the goal of full understanding. Direct and large-eddy simulations are these numerical solutions of turbulence. They reproduce with remarkable fidelity the statistical, structural and dynamical properties of physical turbulent and transitional flows, though since the simula tions are necessarily time-dependent and three-dimensional they demand the most advanced computer resources at our disposal. The numerical techniques vary from accurate spectral methods and high-order finite differences to simple finite-volume algorithms derived on the principle of embedding fundamental conservation prop erties in the numerical operations. Genuine direct simulations resolve all the fluid motions fully, and require the highest practical accuracy in their numerical and temporal discretisation. Such simulations have the virtue of great fidelity when carried out carefully, and repre sent a most powerful tool for investigating the processes of transition to turbulence.
Download or read book Measurements with Particle Image Velocimetry on Fully Developed Turbulent Pipe Flow at Low Reynolds Number written by J. Westerweel and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements with particle image velocimetry were carried out in fully developed turbulent pipe flow at a Reynolds number of 5,277. Data were obtained in a plane through the centerline of the pipe, across the full diameter. Statistical properties of the flow obtained by ensemble averaging of the data along the axial direction were in good agreement with direct numerical simulation. Maps of instantaneous tangential vorticity reveal spatial structures near the pipe wall that resemble coherent flow structures predicted by direct numerical simulation. (Author).
Download or read book Turbulence Modification in Dispersed Multiphase Flows written by Efstathios Michaelides and published by . This book was released on 1989 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report written by United States. National Bureau of Standards and published by . This book was released on 1968 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
