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Recent Developments in Cavitation Mechanisms

Recent Developments in Cavitation Mechanisms
  • Author : Seiichi Washio
  • Publisher :Unknown
  • Release Date :2017-11-13
  • Total pages :288
  • ISBN : 0081015321
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Summary : How does cavitation start? Presently, the nucleus theory provides the answer to this fundamental question. However the idea of nuclei contains inaccuracies that cannot be rationalized. Recent Developments in Cavitation Mechanisms discusses the uncertainties surrounding the nucleus theory, and proposes another theory of cavitation mechanism. Characteristically, the new theory is based on recent discoveries of cavity generation phenomena in separating flows. This book consists of chapters that introduce topics such as unsoundness of cavitation nuclei, and phenomena of cavity generation on walls of flow separation in hydraulic oil and water flows. Subsequent chapters cover the mechanism of cavity generation at point of flow separation, nucleation by contact motion between solids in liquid and a proposal of new cavitation mechanism based on flow separation and solid contact. The final chapters present the demonstration of a new mechanism in the hydraulic poppet valve and a concluding summary. proposes a new mechanism of cavitation inception in liquid machinesdescribes in detail phenomena of cavity generation at point of flow separation recently discovered by the authordiscusses peculiar properties of flow separation as cause of cavity generationpresents abundant experimental data of incipient cavitation obtained with high resolution of time and spaceprovides supplementary materials of slow motion videos that can help understand the very rapid and minute phenomena of cavity generation which has been discovered by the author and will be still unfamiliar to many

Recent Developments in Cavitation Mechanisms

Recent Developments in Cavitation Mechanisms
  • Author : Seiichi Washio
  • Publisher :Unknown
  • Release Date :2014-08-28
  • Total pages :288
  • ISBN : 9781782421764
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Summary : How does cavitation start? Presently, the nucleus theory provides the answer to this fundamental question. However the idea of nuclei contains inaccuracies that cannot be rationalized. Recent Developments in Cavitation Mechanisms discusses the uncertainties surrounding the nucleus theory, and proposes another theory of cavitation mechanism. Characteristically, the new theory is based on recent discoveries of cavity generation phenomena in separating flows. This book consists of chapters that introduce topics such as unsoundness of cavitation nuclei, and phenomena of cavity generation on walls of flow separation in hydraulic oil and water flows. Subsequent chapters cover the mechanism of cavity generation at point of flow separation, nucleation by contact motion between solids in liquid and a proposal of new cavitation mechanism based on flow separation and solid contact. The final chapters present the demonstration of a new mechanism in the hydraulic poppet valve and a concluding summary. proposes a new mechanism of cavitation inception in liquid machines describes in detail phenomena of cavity generation at point of flow separation recently discovered by the author discusses peculiar properties of flow separation as cause of cavity generation presents abundant experimental data of incipient cavitation obtained with high resolution of time and space provides supplementary materials of slow motion videos that can help understand the very rapid and minute phenomena of cavity generation which has been discovered by the author and will be still unfamiliar to many

Cavitation and Bubble Dynamics

Cavitation and Bubble Dynamics
  • Author : Foivos Koukouvinis,Manolos Gavaises
  • Publisher :Unknown
  • Release Date :2021-09-27
  • Total pages :354
  • ISBN : 9780128233986
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Summary : Cavitation and Bubble Dynamics: Fundamentals and Applications examines the latest advances in the field of cavitation and multiphase flows, including associated effects such as material erosion and spray instabilities. This book tackles the challenges of cavitation hindrance in the industrial world, while also drawing on interdisciplinary research to inform academic audiences on the latest advances in the fundamentals. Contributions to the book come from a wide range of specialists in areas including fuel systems, hydropower, marine engineering, multiphase flows and computational fluid mechanics, allowing readers to discover novel interdisciplinary experimentation techniques and research results. This book will be an essential tool for industry professionals and researchers working on applications where cavitation hindrance affects reliability, noise, and vibrations. Covers a wide range of cavitation and bubble dynamics phenomena, including shock wave emission, jetting, and luminescence Provides the latest advice about applications including cavitation tunnels, cavitation testing, flow designs to avoid cavitation in pumps and other hydromachinery, and flow lines Describes novel experimental techniques, such as x-ray imaging and new computational techniques

Advances in Environmental Engineering Research in Poland

Advances in Environmental Engineering Research in Poland
  • Author : Małgorzata Pawłowska,Lucjan Pawłowski
  • Publisher :Unknown
  • Release Date :2021-07-29
  • Total pages :200
  • ISBN : 9781000398816
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Summary : A side-effect of numerous anthropogenic activities involves unfavourable changes in the natural environment. The acquisition of natural resources, especially fossil fuels, solid waste and wastewater production, as well as emission of gases and particulate matter from industrial plants and means of transport contribute to disturbances in the natural cycles of elements between different parts of the environment. Local changes lead to global effects, changing the composition of atmosphere, its capacity for absorbing the infrared radiation and temperature, which has further repercussions in the form of weather anomalies, melting glaciers, flooding, migration or extinction of species, social problems, etc. These global changes can be mitigated by local remedial actions, simultaneously taken all over the world, including Poland. Only the joint efforts of communities from different countries can be successful in preserving the world as we know it for the future generations. Realisation of this task requires the cooperation of experts across many fields of science, environmental engineering being one of most relevant. It comprises the engineering actions taken to preserve the balance of the natural environment or restore it if degradation has occurred. This monograph presents several key issues related to the actions aimed at mitigating the negative impact on the environment connected with the acquisition and transport of energy, management of municipal and industrial wastes, as well as the impact of the industry on the aquatic and soil environment. This book is dedicated to academics, engineers, and students involved in environmental engineering, who are following the advances in the research on environmental aspects of energy production and waste management.

Recent Developments of Soil Mechanics and Geotechnics in Theory and Practice

Recent Developments of Soil Mechanics and Geotechnics in Theory and Practice
  • Author : Theodoros Triantafyllidis
  • Publisher :Unknown
  • Release Date :2019-08-20
  • Total pages :409
  • ISBN : 9783030285166
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Summary : This book provides essential insights into recent developments in fundamental geotechnical engineering research. Special emphasis is given to a new family of constitutive soil description methods, which take into account the recent loading history and the dilatancy effects. Particular attention is also paid to the numerical implementation of multi-phase material under dynamic loads, and to geotechnical installation processes. In turn, the book addresses implementation problems concerning large deformations in soils during piling operations or densification processes, and discusses the limitations of the respective methods. Numerical simulations of dynamic consolidation processes are presented in slope stability analysis under seismic excitation. Lastly, achieving the energy transition from conventional to renewable sources will call for geotechnical expertise. Consequently, the book explores and analyzes a selection of interesting problems involving the stability and serviceability of supporting structures, and provides new solutions approaches for practitioners and scientists in geotechnical engineering. The content reflects the outcomes of the Colloquium on Geotechnical Engineering 2019 (Geotechnik Kolloquium), held in Karlsruhe, Germany in September 2019.

Cavitation in Biomedicine

Cavitation in Biomedicine
  • Author : Mingxi Wan,Yi Feng,Gail ter Haar
  • Publisher :Unknown
  • Release Date :2015-08-29
  • Total pages :503
  • ISBN : 9789401772556
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Summary : This book offers a systematic introduction to the engineering principles and techniques of cavitation in biomedicine on the basis of its physics and mechanism. Adopting an interdisciplinary approach, it covers areas of interest ranging from physics and engineering to the biological and medical sciences. Individual chapters introduce the fundamentals of cavitation, describe its characterization, control and imaging techniques, and present cavitation-enhanced thermal and mechanical effects and their applications. Intended as both a reference work for graduate students, and as a guide for scientists and engineers who work with cavitation in biomedicine, it provides a broad and solid foundation of knowledge. The aim is to bridge the different disciplines involved, and to promote cross-discipline research, thus encouraging innovations in the scientific research and engineering applications alike. Dr. Mingxi Wan is a professor at Department of Biomedical Engineering, Xi’an Jiao Tong University, Xi’an, Shaanxi, China; Dr. Yi Feng works at Department of Biomedical Engineering, Xi’an Jiao Tong University, Xi’an, Shaanxi, China; Dr. Gail ter Haar is a professor at The Institute of Cancer Research, Sutton, Surry, UK.

Ultrasonic Cavitation Treatment of Metallic Alloys

Ultrasonic Cavitation Treatment of Metallic Alloys
  • Author : Iakovos Tzanakis,Dmitry Eskin
  • Publisher :Unknown
  • Release Date :2020-02-05
  • Total pages :110
  • ISBN : 9783039281961
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Summary : This Special Issue scrutinizes the use of ultrasonic-cavitation melt treatment in technology of high-quality metallic alloys with improved mechanical properties, and assesses the driving mechanisms of cavitation-induced effects, such as grain refinement, degassing, wetting, and particle distribution. In this context, the research published in this Special Issue considers the interaction between the cavitation field and acoustic streaming with the melt flow and the suspended solid/liquid phases, the characterization and mapping of cavitation activity in a melt volume, and the possibility of achieving high efficiency in processing large melt volumes through technological approaches for the commercial implementation of ultrasonic processing technology.

MECHANICAL ENGINEERING, ENERGY SYSTEMS AND SUSTAINABLE DEVELOPMENT -Volume III

MECHANICAL ENGINEERING, ENERGY SYSTEMS AND SUSTAINABLE DEVELOPMENT -Volume III
  • Author : Konstantin V. Frolov, Oleg N. Favorsky, R.A. Chaplin and Christos Frangopoulos
  • Publisher :Unknown
  • Release Date :2009-04-15
  • Total pages :504
  • ISBN : 9781848262966
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Summary : Mechanical Engineering, Energy Systems and Sustainable Development theme is a component of Encyclopedia of Physical Sciences, Engineering and Technology Resources in the global Encyclopedia of Life Support Systems (EOLSS), which is an integrated compendium of twenty one Encyclopedias. The Theme on Mechanical Engineering, Energy Systems and Sustainable Development with contributions from distinguished experts in the field discusses mechanical engineering - the generation and application of heat and mechanical power and the design, production, and use of machines and tools. These five volumes are aimed at the following five major target audiences: University and College Students Educators, Professional Practitioners, Research Personnel and Policy Analysts, Managers, and Decision Makers, NGOs and GOs

Fault Diagnosis and Prognosis Techniques for Complex Engineering Systems

Fault Diagnosis and Prognosis Techniques for Complex Engineering Systems
  • Author : Hamid Reza Karimi
  • Publisher :Unknown
  • Release Date :2021-06-28
  • Total pages :419
  • ISBN : 9780128224885
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Summary : Fault Diagnosis and Prognosis Techniques for Complex Engineering Systems gives a systematic description of the many facets of envisaging, designing, implementing, and experimentally exploring emerging trends in fault diagnosis and failure prognosis in mechanical, electrical, hydraulic and biomedical systems. The book is devoted to the development of mathematical methodologies for fault diagnosis and isolation, fault tolerant control, and failure prognosis problems of engineering systems. Sections present new techniques in reliability modeling, reliability analysis, reliability design, fault and failure detection, signal processing, and fault tolerant control of engineering systems. Sections focus on the development of mathematical methodologies for diagnosis and prognosis of faults or failures, providing a unified platform for understanding and applicability of advanced diagnosis and prognosis methodologies for improving reliability purposes in both theory and practice, such as vehicles, manufacturing systems, circuits, flights, biomedical systems. This book will be a valuable resource for different groups of readers – mechanical engineers working on vehicle systems, electrical engineers working on rotary machinery systems, control engineers working on fault detection systems, mathematicians and physician working on complex dynamics, and many more. Presents recent advances of theory, technological aspects, and applications of advanced diagnosis and prognosis methodologies in engineering applications Provides a series of the latest results, including fault detection, isolation, fault tolerant control, failure prognosis of components, and more Gives numerical and simulation results in each chapter to reflect engineering practices

Hydraulic Machinery and Cavitation

Hydraulic Machinery and Cavitation
  • Author : Enrique Cabrera,Vicent Espert,Fernando Martínez
  • Publisher :Unknown
  • Release Date :2015-02-27
  • Total pages :1181
  • ISBN : 9789401093859
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Summary : Hydraulic machinery such as turbines and pumps is widely used around the world. Related topics concerning design, operation and maintenance are of relevant interest. In this context, cavitation is a phenomenon to be taken into account, and this was treated in the XVIII IAHR Symposium on Hydraulic Machinery and Cavitation which took place in Valencia, Spain, 16th-19th September, 1996 and which was hosted by the Polytechnic University of Valencia. The proceedings of the Symposium have been published in two volumes. In this first volume, the papers included cover the following topics: Hydraulic Turbines, Analysis and Design Hydraulic Pumps Hydraulic Elements, Dynamic Characterization and Hydraulic Behaviour Cavitation and Sand Erosion In the second volume, the papers included cover the following topics: Hydraulic Transients and Control Systems Related to Hydraulic Machinery and Plants Oscillatory and Vibration Problems in Hydraulic Machinery and Power Stations Experimental Investigations related to Hydraulic Machinery and its Applications Practical Applications of the Hydraulic Machinery Monitoring, Predictive Maintenance and Refurbishment The 119 papers presented at the Symposium, from research groups, consulting companies and manufacturers, constitute an important collection for investigators, engineers and technicians who are interested in updated information on hydraulic machinery. This book is intended to be a reference text comprising the latest innovations on this subject.

Second International Conference on Cavitation

Second International Conference on Cavitation
  • Author : Institution of Mechanical Engineers (Great Britain). Power Industries Division,American Society of Mechanical Engineers. Fluids Engineering Division
  • Publisher :Unknown
  • Release Date :1983
  • Total pages :298
  • ISBN : UCSD:31822010002822
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Summary :

Applied Mechanics Reviews

Applied Mechanics Reviews
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :1992
  • Total pages :229
  • ISBN : OSU:32435026160556
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Summary :

IUTAM Symposium on Recent Advances in Moving Boundary Problems in Mechanics

IUTAM Symposium on Recent Advances in Moving Boundary Problems in Mechanics
  • Author : Stefanie Gutschmidt,James N. Hewett,Mathieu Sellier
  • Publisher :Unknown
  • Release Date :2019-03-28
  • Total pages :296
  • ISBN : 9783030137205
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Summary : Many problems in mechanics involve deformable domains with moving boundaries, including fluid-structure interaction, multiphase flows, flows over soft tissues and textiles, or flows involving accretion/erosion to name but a few. The presence of a moving boundary presents considerable challenges when it comes to modelling and understanding the underlying system dynamics. This proceedings volume collects contributions made at the IUTAM Symposium on Recent Advances in Moving Boundary Problems in Mechanics held in Christchurch, New Zealand in February 2018.

Biopharmaceutical Drug Design and Development

Biopharmaceutical Drug Design and Development
  • Author : Susanna Wu-Pong,Yon Rojanasakul
  • Publisher :Unknown
  • Release Date :2010-01-11
  • Total pages :375
  • ISBN : 1597455326
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Summary : This book provides a comprehensive examination of the newest biopharmaceutical drugs. Among the drugs discussed are ones in the categories of monoclonal antibodies for in-vivo use, cytokines, growth factors, enzymes, immunomodulators, thrombolytics, and immonotherapies including vaccines. Additionally, the volume examines new and emerging technologies, and contains a review of the Human Genome Project.

Unsaturated Soils. Advances in Geo-Engineering

Unsaturated Soils. Advances in Geo-Engineering
  • Author : D.G. Toll,C.E. Augarde,D. Gallipoli,S.J. Wheeler
  • Publisher :Unknown
  • Release Date :2008-06-23
  • Total pages :1006
  • ISBN : 9780203884430
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Summary : Unsaturated Soils: Advances in Geo-Engineering comprises 136 contributions from leading international researchers and practitioners, presented at the First European Conference on Unsaturated Soils (Durham, UK, 2-4 July 2008). The papers report on the latest advances in geo-engineering aspects of unsaturated soils. It is the first collection to focu

Shock Wave Science and Technology Reference Library, Vol. 1

Shock Wave Science and Technology Reference Library, Vol. 1
  • Author : Rini van Dongen
  • Publisher :Unknown
  • Release Date :2007-04-08
  • Total pages :365
  • ISBN : 9783540358466
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Summary : This book offers a timely reference on shock waves in multiphase flows, including new viewpoints and burgeoning developments. This volume treats shock and expansion waves in complex, bubbly liquids and cryogenic liquids. It also examines the relationship of shock waves with phase transitions and induced phase transitions as well as their interaction with solid foams, textiles, porous and granular media.

Trends and Opportunities in Materials Research

Trends and Opportunities in Materials Research
  • Author : National Science Foundation (U.S.). Materials Research Advisory Committee
  • Publisher :Unknown
  • Release Date :1984
  • Total pages :28
  • ISBN : UCR:31210023571522
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Summary :

Recent Developments in Polymer Macro, Micro and Nano Blends

Recent Developments in Polymer Macro, Micro and Nano Blends
  • Author : P. M. Visakh,Gordana Markovic,Daniel Pasquini
  • Publisher :Unknown
  • Release Date :2016-08-24
  • Total pages :342
  • ISBN : 9780081004272
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Summary : Recent Developments in Polymer Macro, Micro and Nano Blends: Preparation and Characterisation discusses the various types of techniques that are currently used for the characterization of polymer-based macro, micro, and nano blends. It summarizes recent technical research accomplishments, emphasizing a broad range of characterization methods. In addition, the book discusses preparation methods and applications for various types of polymer-based macro, micro, and nano blends. Chapters include thermoplastic-based polymer & nano blends, applications of rubber based and thermoplastic blends, micro/nanostructures polymer blends containing block copolymers, advances in polymer-inorganic hybrids as membrane materials, synthesis of polymer/inorganic hybrids through heterophase polymerizations, nanoporous polymer foams from nanostructured polymer blends, and natural polymeric biodegradable nano blends for protein delivery. Describes the techniques pertaining to a kind (or small number) of blends, showing specific examples of their applications Covers micro, macro, and nano polymer blends Contains contributions from leading experts in the field

TID

TID
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :19??
  • Total pages :229
  • ISBN : CORNELL:31924105636959
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Summary :

Cavitation Instabilities and Rotordynamic Effects in Turbopumps and Hydroturbines

Cavitation Instabilities and Rotordynamic Effects in Turbopumps and Hydroturbines
  • Author : Luca d'Agostino,Maria Vittoria Salvetti
  • Publisher :Unknown
  • Release Date :2017-03-17
  • Total pages :282
  • ISBN : 9783319497198
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Summary : The book provides a detailed approach to the physics, fluid dynamics, modeling, experimentation and numerical simulation of cavitation phenomena, with special emphasis on cavitation-induced instabilities and their implications on the design and operation of high performance turbopumps and hydraulic turbines. The first part covers the fundamentals (nucleation, dynamics, thermodynamic effects, erosion) and forms of cavitation (attached cavitation, cloud cavitation, supercavitation, vortex cavitation) relevant to hydraulic turbomachinery, illustrates modern experimental techniques for the characterization, visualization and analysis of cavitating flows, and introduces the main aspects of the hydrodynamic design and performance of axial inducers, centrifugal turbopumps and hydo-turbines. The second part focuses on the theoretical modeling, experimental analysis, and practical control of cavitation-induced fluid-dynamic and rotordynamic instabilities of hydraulic turbomachinery, with special emphasis on cavitating turbopumps (cavitation surge, rotating cavitation, higher order cavitation surge, rotordynamic whirl forces). Finally, the third part of the book illustrates the alternative approaches for the simulation of cavitating flows, with emphasis on both modeling and numerical aspects. Examples of applications to the simulation of unsteady cavitation in internal flows through hydraulic machinery are illustrated in detail.

Proceedings of the 2nd International Conference on Developments in Valves and Actuators for Fluid Control

Proceedings of the 2nd International Conference on Developments in Valves and Actuators for Fluid Control
  • Author : Peter Wood,Lorraine Grove
  • Publisher :Unknown
  • Release Date :2013-06-29
  • Total pages :361
  • ISBN : 9783662114636
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Summary : The flow of two-phase mixtures through restrictions. is a complex phenomenon that to date has not been fully described analytically. It is an area that received a geat deal of attention because of its application to nuclear reactor technology. The majority of the work done in this area considered ideal geometries such as nozzles, orifices and straight pipes. In the area of control valves very little work has been done. Brockett & King [1] studied subcooled water. Stiles [2] looked at subcooled freon. Martinec [4] compared subcooled freon in valves with ideal geometries. Sheldon & Schuder [3) looked experimentally at airjwater mixtures through valves that resulted in a sizing procedure. Fagerlund [10] presented an analytical model that required use of the Sheldon & Schuder data to establish the behavior of valves as opposed to more ideal geometries. However, the data used was limited to a single valve travel. Fagerlund & Storer [11] have expanded this to include several valve travels that further generalizes the technique. It is the intent of this paper to summarize a practical approach to s1z1ng valves for two-phase service that may be reduced to either a graphical or calculator procedure. Discussion of Analysis A fundamental assumption in this method is that the quality remains constant between the inlet and the vena contracta. For gas-liquid flows it is obvious providing vaporization does not occur.