Download or read book Generation of Oscillatory Flows written by Rudolf Wille and published by . This book was released on 1972 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Generation of Oscillatory Flows written by Rudolf Wille and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Symposium on Flow Induced Structural Vibrations written by Symposium on Flow Induced Structural Vibrations and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Generation of Oscillatory Flows written by and published by . This book was released on 1972 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat Transfer Processes in Oscillatory Flow Conditions written by Artur J. Jaworski and published by MDPI. This book was released on 2018-04-06 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Heat Transfer Processes in Oscillatory Flow Conditions" that was published in Applied Sciences
Download or read book Micromixers written by Nam-Trung Nguyen and published by William Andrew. This book was released on 2011-09-17 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability to mix minute quantities of fluids is critical in a range of recent and emerging techniques in engineering, chemistry and life sciences, with applications as diverse as inkjet printing, pharmaceutical manufacturing, specialty and hazardous chemical manufacturing, DNA analysis and disease diagnosis. The multidisciplinary nature of this field – intersecting engineering, physics, chemistry, biology, microtechnology and biotechnology – means that the community of engineers and scientists now engaged in developing microfluidic devices has entered the field from a variety of different backgrounds. Micromixers is uniquely comprehensive, in that it deals not only with the problems that are directly related to fluidics as a discipline (aspects such as mass transport, molecular diffusion, electrokinetic phenomena, flow instabilities, etc.) but also with the practical issues of fabricating micomixers and building them into microsystems and lab-on-chip assemblies.With practical applications to the design of systems vital in modern communications, medicine and industry this book has already established itself as a key reference in an emerging and important field. The 2e includes coverage of a broader range of fabrication techniques, additional examples of fully realized devices for each type of micromixer and a substantially extended section on industrial applications, including recent and emerging applications. Introduces the design and applications of micromixers for a broad audience across chemical engineering, electronics and the life sciences, and applications as diverse as lab-on-a-chip, ink jet printing, pharmaceutical manufacturing and DNA analysis Helps engineers and scientists to unlock the potential of micromixers by explaining both the scientific (microfluidics) aspects and the engineering involved in building and using successful microscale systems and devices with micromixers The author's applied approach combines experience-based discussion of the challenges and pitfalls of using micromixers, with proposals for how to overcome them
Download or read book Space Plasma Volume 2 Flow Waves and Oscillations written by I︠A︡kov Lʹvovich Alʹpert and published by CUP Archive. This book was released on 1990-04-19 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rectilinear Fluid Flow Generator of Oscillating Type written by W. H. Hoppmann and published by . This book was released on 1966 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: A rectilinear fluid flow generator of an oscillating type was developed for the purpose of studying the rheological properties and flow characteristics of both Newtonian and non-Newtonian liquids. It consists essentially of a long horizontally supported straight tube which can be filled with a liquid in which an equally long concentric cylinder can be oscillated axially in harmonic motion at a predetermined frequency and amplitude. The external tube is mounted on elastic supports of measurable stiffness so that its natural frequency of axial oscillation can be readily calculated. Also, the motion of the external tube and the resultant force acting on it are readily measurable at any time. The principle of the apparatus depends on the fact that the outside tube is moved only by the liquid which itself is caused to flow by the controlled oscillations of the inside tube. It is assumed, at least in principle, that if the motion of the outside tube is known for a given motion of the inside cylinder, the constitutive equations for the liquid can be determined. Or conversely, if the constitutive equations are known, the motion of the outside tube can be calculated for a given motion of the driving inside cylinder. (Author).
Download or read book Experimental Investigation of an Oscillating Flow Generator written by Cogan S. Semler and published by . This book was released on 2010 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this project was to construct and test a device that can transform fluid flow into the continuous oscillatory linear motion of a hydro/airfoil. This device may be used to generate power from a renewable energy source such as tidal flow or wind power. The device was constructed in the NPS machine shop. It consisted of a flat plate that is mounted on two rail guides such that it can execute a linear back-and-forth motion. The blade oscillation is flow induced due to the lift and the moment generated on the flat plate in such a way that the plate reverses direction at the stroke endpoints without active control. Tests in two water channels and one towing tank showed that flow-induced blade oscillation could be achieved for certain combinations of flow speed, blade size and pitch axis location. It is concluded that additional testing is warranted to further develop and gain understanding of this technology and its possible application to renewable power generation.
Download or read book The Generation of Water Waves with a Vertically Oscillating Flow at a Channel Bottom written by Yoshimi Gōda and published by . This book was released on 1964 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental and Theoretical Study of Oscillatory Two Phase Flows with Heat and Mass Transfer written by Faith Rose Beck and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents experimental and theoretical analyses of oscillatory two-phase flows with heat and mass transfer on liquid carryover behavior during refloodof a simulated nuclear reactor core. In a hypothetical large break loss of coolantaccident (LBLOCA), associated with a break in one of the hot- or cold-legs, theemergency core cooling system (ECCS) must provide sufficient coolant to the coreto remove decay heat and prevent the cladding from exceeding 1477.6 K. Duringreflood, flow to the core is gravity-driven, resulting in an oscillatory delivery ofcoolant. These oscillations have been attributed to vapor generation in the coreand a dynamic response of the downcomer water level. Nearly all reflood simulation experiments have been conducted with constant reflood rates, and have not considered the effect of oscillations on rod bundle thermal-hydraulics. The few studies that have been conducted with oscillating flow indicated enhanced entrainment and carryover of liquid from the quench front. While higher entrainmentcan provide precursory cooling ahead of the quench front, it can also expel morecoolant out of the system during oscillatory reflood. The amount of liquid entrained can be significant because, in an accident scenario, the quench rate will beslowed, and it can take longer to fully recover the core. At the Nuclear Regulatory Commission (NRC)/Penn State University (PSU) Rod Bundle Heat Transfer(RBHT) Test Facility, an electrically heated 77, 3.66 m (full-length) rod bundlearray has the capability of performing both constant and oscillatory forced floodingrate experiments. The facility is heavily instrumented, equipped with seven spacergrids with which to analyze droplet and heat transfer phenomena. The system canvary the oscillation period (2 to 10 s), magnitude (0.0254 to 0.0762 m/s), systempressure (0.14 to 0.41 MPa), and subcooling (5 to 55 C) in order to study theentrained droplet dynamics and heat transfer under constant and oscillatory flowconditions.This dissertation includes the analysis of forced oscillatory reflood experiments, which concentrate on the effects of flow (frequency, magnitude, and nominal flooding rate) and system parameters (pressure, subcooling, and bundle fouling) on heat transfer and entrained droplet dynamics. Major findings from the experimental work include: 1) decreasing the oscillation period decreases the peak cladding temperature and the steam temperatures, as well as enhances the liquid carryoverwhen compared with constant reflood experiments; 2) decreasing the system pres-sure enhances the effect of flow oscillations; and 3) the presence of bundle foulingimproves cooling and decreases the amount of liquid carryover. To the authorsknowledge, experiments with the parameters varied in this work, coupled with therod bundle geometry, have not been explored previously.This dissertation utilizes the unique dataset collected at the NRC/PSU RBHT to perform a stability analysis of oscillatory two-phase flows. The governing equations established for this flow incorporate Floquet and viscous-potential flow theories. From the analysis, it is found that the stability at the two-phase interface is highly dependent on the flow orientation and heat transfer to the system. Inaddition, a correlation is developed for the liquid carryover that uses parameters derived from the stability analysis to predict the carryover during oscillatory reflood. The correlation is the first of its kind to include the effects of a moving quench front on the liquid carryover. The carryover model is validated using NRC/PSU RBHT data, as well as other relevant rod bundle data, and the NRCs TRACE code.
Download or read book Oscillating Dispersed Phase Co Flow Microfluidic Droplet Generation written by Amin Shams Khorrami and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Droplet-based microfluidics have emerged as versatile platforms offering unique advantages in biology and chemistry. Although there is adequate control on size and monodispersity, most conventional microfluidic techniques cannot generate more than one droplet size at a time in a continuous and high-throughput manner. Moreover, the widely used co-flow microfluidic droplet generation technique is bottlenecked with droplet polydispersity at high throughputs due to the transition from a more-stable dripping regime to an instable jetting regime at high d-phase flow rates. We applied nozzle oscillatory motion to generate an axial shear gradient as well as inducing an additional transverse drag force. We hypothesized that the combined effects of axial and transverse drags can be used for overcoming the aforementioned limitations of co-flow systems. Nozzle oscillation effect was studied in both dripping and jetting regimes to generate repeatable patterns of multi-size monodisperse droplets and jet length reduction in different biphasic systems, respectively.
Download or read book Particles in Flows written by Tomáš Bodnár and published by Birkhäuser. This book was released on 2017-09-30 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims to face particles in flows from many different, but essentially interconnected sides and points of view. Thus the selection of authors and topics represented in the chapters, ranges from deep mathematical analysis of the associated models, through the techniques of their numerical solution, towards real applications and physical implications. The scope and structure of the book as well as the selection of authors was motivated by the very successful summer course and workshop "Particles in Flows'' that was held in Prague in the August of 2014. This meeting revealed the need for a book dealing with this specific and challenging multidisciplinary subject, i.e. particles in industrial, environmental and biomedical flows and the combination of fluid mechanics, solid body mechanics with various aspects of specific applications.
Download or read book Fundamentals of Waves and Oscillations written by K. U. Ingard and published by Cambridge University Press. This book was released on 1988-07-28 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook, addressed primarily to physics and engineering students, is a comprehensive introduction to waves and oscillations, both mechanical and electromagnetic. Elementary aspects of matter waves are also considered. One objective is to illustrate the physics involved in the description and analysis of waves through a wide range of examples, from purely mechanical and purely electromagnetic to coupled electro-mechanical waves, such as plasma oscillations and hydromagnetic waves. In this process, the use of complex amplitudes in the mathematical analysis is illuminated and encouraged to make tractable a wider range of problems than is ordinarily considered in an introductory text. General concepts and wave phenomena such as wave energy and momentum, interference, diffraction, scattering, dispersion, and the Doppler effect are illustrated by numerous examples and demonstrations. Among the special topics covered are waves on periodic structures and in solids, wave guides, a detailed analysis of light scattering from thermal fluctuations of a liquid surface, and feedback instabilities. Important ideas and equations are displayed in boxes for easy reference, and there are numerous examples throughout the text and exercises at the end of every chapter. Undergraduates and graduates should find this an indispensable account of this central subject in science and engineering.
Download or read book Audels Engineers and Mechanics Guide written by and published by . This book was released on 1921 with total page 1068 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bed Forms Generated in the Laboratory Under an Oscillatory Flow written by Marion Robert Carstens and published by . This book was released on 1969 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Generation of Unsteady Mean and Turbulent Flows in a Wind Tunnel Using an Active Grid written by Abdullah Azzam and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unsteady flows are pervasive in nature and engineering applications such as UAVs. Simulating these flows in an experimental setting is key to avoiding detrimental changes in the performance of such applications. This study explores the capabilities of an active grid in producing unsteady flows in a recirculating wind tunnel. The grid is operated in different modes that allow control over the flow frequency, amplitude and turbulence intensity. Hot-wire measurements demonstrate the grid's capabilities in generating flows typical of those used in experiments of unsteady aerodynamics. Mean grid blockage, freestream speed and tunnel size were all found to be factors influencing the resulting flow. The response of turbulence to the oscillating flow was also investigated and results showed a modulation of the turbulence intensity and dissipation rate that is dependent on the frequency of the imposed oscillations. A change in the scaling behaviour of the dissipation rate was also noted.
