Mitigation of Hydrodynamic Resistance

Mitigation of Hydrodynamic Resistance

This text presents the state of the art in friction drag/resistance reduction technologies for BODIES and crafts operating in liquids at and beneath the free surface.

Author: Marc Perlin

Publisher: World Scientific

ISBN: 9789814612272

Category: Technology & Engineering

Page: 164

View: 210

This text presents the state of the art in friction drag/resistance reduction technologies for BODIES and crafts operating in liquids at and beneath the free surface. It is useful for professionals with backgrounds in advanced fluid dynamics as well as by academics teaching introductory graduate courses in this area. Active control of resistance will include a discussion of friction reduction, for example through the injection of gas that can form air layers and polymers that initially reside adjacent to the hull, including the use of partial and super cavities. The book discusses passive resistance control achieved through changes in the overall hull shape and appendages, including the application of lifting bodies, bulbous bows, and stern flaps. It also addresses passive reduction of skin friction through the application of hull coatings and other elements of hull husbandry. Contents:IntroductionActive Techniques:Modification of Drag by Polymer InjectionFriction Drag Reduction by Bubble/Gas InjectionTransition from BDR and Air Layer Drag ReductionFriction Drag Reduction by Partial Air Cavities or PCDRPassive Techniques:Drag Reduction by Super and Partial CavitiesSuper-Hydrophobic Surfaces and CoatingsPassive Resistance-Mitigation by Appendages: Bulbous Bows, Stern Flaps and Wedges, and Lifting Bodies Readership: Professionals, academics, researchers, and graduate students in ocean engineering, mechanical engineering, fluid mechanics and tribology. Keywords:Drag Reduction;Air Layers;Air Cavities;Polymer Injection;Bubble/Gas Injection;Hydrophobic Surfaces;Passive Drag Mitigation
Categories: Technology & Engineering

Mitigation of Hydrodynamic Resistance

Mitigation of Hydrodynamic Resistance

This text presents the state of the art in friction drag/resistance reduction technologies for BODIES and crafts operating in liquids at and beneath the free surface.

Author: Marc Perlin

Publisher:

ISBN: OCLC:1162061151

Category: Hulls (Naval architecture)

Page: 165

View: 416

This text presents the state of the art in friction drag/resistance reduction technologies for BODIES and crafts operating in liquids at and beneath the free surface. It is useful for professionals with backgrounds in advanced fluid dynamics as well as by academics teaching introductory graduate courses in this area. Active control of resistance will include a discussion of friction reduction, for example through the injection of gas that can form air layers and polymers that initially reside adjacent to the hull, including the use of partial and super cavities. The book discusses passive resistance control achieved through changes in the overall hull shape and appendages, including the application of lifting bodies, bulbous bows, and stern flaps. It also addresses passive reduction of skin friction through the application of hull coatings and other elements of hull husbandry.
Categories: Hulls (Naval architecture)

Geotechnical Engineering for Disaster Mitigation and Rehabilitation

Geotechnical Engineering for Disaster Mitigation and Rehabilitation

ANALYSIS METHOD To cylinder bridge piers, the hydrodynamic pressure of the ... rate of bridge pie the hydrodynamic resistance pressure caused is little, ...

Author: Han-Long Liu

Publisher: Springer Science & Business Media

ISBN: 3540798463

Category: Science

Page: 1104

View: 245

"Geotechnical Engineering for Disaster Mitigation and Rehabilitation" presents the latest developments and case studies in the field. All contributions to this proceedings were rigorously reviewed to cover the newest developments in disasters related to earthquakes, landslides and slopes, soil dynamics, risk assessment and management, disaster mitigation and rehabilitation, and others. The book will be a useful reference for geotechnical scientists, engineers and professionals in these areas.
Categories: Science

Foam Engineering

Foam Engineering

... the increased hydrodynamic resistance of foam film resulted in an increase in the mitigation [32, 33]. However, as the liquid fraction, ...

Author: Paul Stevenson

Publisher: John Wiley & Sons

ISBN: 9781119961093

Category: Technology & Engineering

Page: 548

View: 532

Containing contributions from leading academic and industrial researchers, this book provides a much needed update of foam science research. The first section of the book presents an accessible summary of the theory and fundamentals of foams. This includes chapters on morphology, drainage, Ostwald ripening, coalescence, rheology, and pneumatic foams. The second section demonstrates how this theory is used in a wide range of industrial applications, including foam fractionation, froth flotation and foam mitigation. It includes chapters on suprafroths, flotation of oil sands, foams in enhancing petroleum recovery, Gas-liquid Mass Transfer in foam, foams in glass manufacturing, fire-fighting foam technology and consumer product foams. Key features: Foam fractionation is an exciting and emerging technology, starting to gain significant attention Discusses a vital topic for many industries, especially mineral processing, petroleum engineering, bioengineering, consumer products and food sector Links foam science theory to industrial applications, making it accessible to an engineering science audience Summarizes the latest developments in this rapidly progressing area of research Contains contributions from leading international researchers from academia and industry
Categories: Technology & Engineering

Tsunami Engineering Perspective For Mitigation Protection And Modeling

Tsunami  Engineering Perspective For Mitigation  Protection And Modeling

Hydrodynamics of Offshore Structures. Computational Mechanics Publications, Southampton Boston. Chen, C. I. (1976). “Flow resistance in board shallow ...

Author: Vallam Sundar

Publisher: World Scientific

ISBN: 9789811216077

Category: Technology & Engineering

Page: 292

View: 255

The most pertinent tsunami related issues such as water borne debris during tsunami flooding, design loads to incorporate for impact forces on coastal zone infrastructure, detection and warning are meticulously incorporated in this book.Modelling of various coastal processes have proven to be successful in the recent past, which includes extreme events such as storm surge, cyclone, etc. The possible provisions for computational/numerical tsunami modelling and real physical modelling in laboratory are elaborated. The propagation, evolution and run-up of tsunami waves and their associated non-linear dynamics are discussed.The significant inferences from the experts who have had hands-on experience working with the extensive magnitude of a tsunami disaster reported on the signature studies and post-facto effects of the 2004 Indian Ocean Tsunami, with respect to the damages along the Indian coast.
Categories: Technology & Engineering

Ecosystem Based Disaster Risk Reduction and Adaptation in Practice

Ecosystem Based Disaster Risk Reduction and Adaptation in Practice

Hydrodynamic attenuation is equal to the proportion of wave height/current flow ... 2006) in a non-linear relationship, and is caused by flow resistance, ...

Author: Fabrice G. Renaud

Publisher: Springer

ISBN: 9783319436333

Category: Nature

Page: 598

View: 810

This book is a compilation of recent developments in the field of ecosystem-based disaster risk reduction and climate change adaption (Eco-DRR/CCA) globally. It provides further evidence that ecosystem-based approaches make economic sense, and showcases how research has progressively filled knowledge gaps about translating this concept into practice. It presents a number of methods, and tools that illustrate how Eco-DRR/CCA has been applied for various ecosystems and hazard contexts around the world. It also discusses how innovative institutional arrangements and policies are shaping the field of Eco-DRR/CCA. The book is of relevance to scientists, practitioners, policy-makers and students in the field of ecosystem management for disaster risk reduction and climate change adaptation.
Categories: Nature

Metrology of Pedestrian Locomotion and Slip Resistance

Metrology of Pedestrian Locomotion and Slip Resistance

... forces which may mitigate or eliminate the hydrodynamic effects that form the phenomenological basis of wet-surface pedestrian slip resistance.

Author: ASTM International Committee F13 on Safety and Traction for Footwear

Publisher: ASTM International

ISBN: 0803134541

Category: Flooring

Page: 136

View: 392

Papers from the June 2001 Symposium on Metrology of Pedestrian Locomotion and Slip Resistance present the latest research findings on both how much friction pedestrians require during ambulation and how to measure the friction available between the walkway surface and the shoe bottom. Some specific
Categories: Flooring

Handbook of Coastal Disaster Mitigation for Engineers and Planners

Handbook of Coastal Disaster Mitigation for Engineers and Planners

Hydrodynamic and impact forces are required to be increased by an Importance ... This overall systemic strength will also provide resistance to the lateral ...

Author: Miguel Esteban

Publisher: Butterworth-Heinemann

ISBN: 9780128012703

Category: Technology & Engineering

Page: 788

View: 164

The world’s population is expected to increase to over 8 billion by 2020. About 60% of the total population of the world lives in coastal areas and 65% of the cities with a population of over 2.5 million are located in coastal areas. Written by an international panel of experts in the fields of engineering and risk management, The Handbook of Coastal Disasters Mitigation presents a coherent overview of 10 years of coastal disaster risk management and engineering, during which some of the most relevant events of recent time have taken place, including the Indian Ocean tsunami, hurricanes Katrina and Sandy in the United States or the 2011 Japanese tsunami. International case studies offer practical lessons on how disaster resilience can be improved in the future Contains tools and techniques for analyzing and managing the risk of coastal disasters Provides engineering measures for mitigating coastal vulnerability to tsunamis, tropical cyclones, and hurricanes Includes crucial tactics for rehabilitation and reconstruction of the infrastructure
Categories: Technology & Engineering

A New Era for Microbial Corrosion Mitigation Using Nanotechnology

A New Era for Microbial Corrosion Mitigation Using Nanotechnology

This was investigated in two different hydrodynamic circumstances; orbital shaking ... Decrease in corrosion resistance of A36 CS occurred because of the ...

Author: Basma A. Omran

Publisher: Springer Nature

ISBN: 9783030495329

Category: Technology & Engineering

Page: 201

View: 771

This book focuses on corrosion and microbial corrosion, providing solutions for these problems based on nanotechnology and nanobiotechnology. It introduces the causes, consequences, cost and control of corrosion processes. It gives a particular emphasis on microbial corrosion of steel and other metals in oil, gas and shipping industries. The book presents the materials vulnerable to such kind of corrosion, and the use of nanomaterials to control it.
Categories: Technology & Engineering

Methods and Techniques for Preventing and Mitigating Water Hazards in Mines

Methods and Techniques for Preventing and Mitigating Water Hazards in Mines

The resistance along the way is low, resulting in a large amount of water and ... hydrodynamic pressure to break through the argillaceous-cemented filling.

Author: Shuning Dong

Publisher: Springer Nature

ISBN: 9783030670597

Category: Science

Page: 510

View: 798

This book summarizes the advances in mine hydrogeology in terms of the development of new technologies and sustainable mining to prevent water inrush disasters during coal-mine construction and production in China. It presents holistic topics that balance safe coal mining and the minimization of impacts on the environment and human beings. Systematically describing the methods and techniques used in China’s coal mines to predict, prevent and mitigate water inrushes, it includes nine case studies to illustrate the practical engineering solutions using state-of-art methods and technologies under various conditions. It also discusses how the approaches could help solve the world’s water problems, not only in mining, but also in tunneling, disposing of nuclear waste, storing natural gas, and sequestering CO2, as well as their impact on mining industries and related fields around the world. The book intended for students, researchers and practitioners working in the mining industries.
Categories: Science

River Basin Modelling for Flood Risk Mitigation

River Basin Modelling for Flood Risk Mitigation

Michioku , K. , Takemoto , O. and Hirota , M. , 1999 , Flow resistance in an ... Naot , D. , Nezu , I. and Nakagawa , H. , 1993a , Hydrodynamic behaviour of ...

Author: Donald Knight

Publisher: CRC Press

ISBN: 1439824703

Category: Technology & Engineering

Page: 616

View: 948

Flooding accounts for one-third of natural disasters worldwide and for over half the deaths which occur as a result of natural disasters. As the frequency and volume of flooding increases, as a result of climate change, there is a new urgency amongst researchers and professionals working in flood risk management. River Basin Modelling for Flood Risk Mitigation brings together thirty edited papers by leading experts who gathered for the European Union’s Advanced Study Course at the University of Birmingham, UK. The scope of the course ranged from issues concerning the protection of life, to river restoration and wetland management. A variety of topics is covered in the book including climate change, hydro-informatics, hydro-meterology, river flow forecasting systems and dam-break modelling. The approach is broad, but integrated, providing an attractive and informative package that will satisfy researchers and professionals, while offering a sound introduction to students in Engineering and Geography.
Categories: Technology & Engineering

Earthquake Hazards and Mitigation

Earthquake Hazards and Mitigation

Effects of hydrostatic and hydrodynamic forces (along with self weight of the ... They have high degree of resistance due to their damping and flexibility ...

Author: R. Ayothiraman

Publisher: I. K. International Pvt Ltd

ISBN: 9788189866778

Category: Earthquake engineering

Page: 564

View: 132

discusses the new developments in the field of earthquake engineering and allied areas, * gives information about present state-of-the-art and current practices adopted globally in prediction and mitigation of earthquake hazards, * explores novel and innovative methods for prediction and mitigation of hazards considering the future earthquakes for building sustainable/ safe infrastructures and ensuring safety of community.
Categories: Earthquake engineering

Techniques for Disaster Risk Management and Mitigation

Techniques for Disaster Risk Management and Mitigation

COUPLED WAVE‐HYDRODYNAMIC MODELS Prior studies have used wave and hydrodynamic ... to experience an increased bottom resistance in the presence of waves.

Author: Prashant K. Srivastava

Publisher: John Wiley & Sons

ISBN: 9781119359173

Category: Science

Page: 352

View: 120

A comprehensive guide to managing and mitigating natural disasters Recent years have seen a surge in the number, frequency, and severity of natural disasters, with further increases expected as the climate continues to change. However, advanced computational and geospatial technologies have enabled the development of sophisticated early warning systems and techniques to predict, manage, and mitigate disasters.Techniques for Disaster Risk Management and Mitigation explores different approaches to forecasting disasters and provides guidance on mitigation and adaptation strategies. Volume highlights include: Review of current and emerging technologies for disaster prediction Different approaches to risk management and mitigation Strategies for implementing disaster plans and infrastructure improvements Guidance on integrating artificial intelligence with GIS and earth observation data Examination of the regional and global impacts of disasters under climate variability
Categories: Science

Air Lubricated and Air Cavity Ships

Air Lubricated and Air Cavity Ships

... which demonstrated that the hydrodynamic resistance of the models were ... in the natural ocean medium, and found an important reduction of velocity ...

Author: Gennadiy Alexeevitch Pavlov

Publisher: Springer Nature

ISBN: 9781071604250

Category: Technology & Engineering

Page: 469

View: 488

Air Lubrication and Air Cavity Technology is a major development that has emerged in recent years as a means to reduce resistance and powering for many types of ships, and an efficient design for high speed marine vessels. This book introduces the mechanisms for boundary layer drag reduction and concepts studied in early research work. Air bubble and sheet lubrication for displacement vessels is outlined and the key projects introduced. Generation of low volume flow air cavities under the hull of displacement, semi displacement and planing vessels are introduced together with theoretical and empirical analysis and design methods. Resistance reduction, power reduction and fuel efficiency are covered for both displacement and high speed vessels. Air layer and air cavity effects on vessel static and dynamic stability are covered, linked to regulatory requirements such as IMO. Seaway motions and reduced impact load of high speed craft in waves are discussed including model test results. Integration of propulsion systems for optimum powering is summarized. A design proposal for a wave piercing air cavity craft is included in an appendix. A comprehensive listing of document resources and internet locations is provided for further research.
Categories: Technology & Engineering

Environmental Software Systems Infrastructures Services and Applications

Environmental Software Systems  Infrastructures  Services and Applications

The mitigation modeling tool being developed consists of the following key components: 1. Hydrodynamic Module - A 2D shallow water based model will be used ...

Author: Ralf Denzer

Publisher: Springer

ISBN: 9783319159942

Category: Computers

Page: 611

View: 858

This book constitutes the refereed proceedings of the 11th IFIP WG 5.11 International Symposium on Environmental Software Systems, ISESS 2015, held in Melbourne, Australia, in March 2015. The 62 revised full papers presented were carefully reviewed and selected from 104 submissions. The papers are organized in the following topical sections: information systems, information modeling and semantics; decision support tools and systems; modelling and simulation systems; architectures, infrastructures, platforms and services; requirements, software engineering and software tools; analytics and visualization; and high-performance computing and big data.
Categories: Computers

Progress of Geo Disaster Mitigation Technology in Asia

Progress of Geo Disaster Mitigation Technology in Asia

... as open structures that will allow water to flow through with minimal resistance. ... Direct hydrostatic and hydrodynamic forces from water inundation.

Author: Fawu Wang

Publisher: Springer Science & Business Media

ISBN: 9783642291074

Category: Nature

Page: 624

View: 141

This book includes the recent 10-year achievement of geo-disaster mitigation by leading Asian scientists from Japan, China, Indonesia, Korea, Iran and Far East of Russia. Case studies on recent occurred geo-disasters in Asian region have been presented. The forming mechanics of hazards such as earthquake and landslide are deeply discussed, and the disaster mitigation technology for building and pipeline safety, landslide hazard assessment and risk management are introduced.
Categories: Nature

Scaling in Biology

Scaling in Biology

The hydrodynamic resistance of a given tube, Z2, is given by the classic Poiseuille ... This linear increase in resistance would seemingly mitigate against ...

Author: James H. Brown

Publisher: Oxford University Press on Demand

ISBN: 9780195131420

Category: Medical

Page: 352

View: 276

Scaling relationships have been a persistent theme in biology at least since the time of Leonardo da Vinci and Galileo. Because scaling relationships are among the most general empirical patterns in biology, they have stimulated research to develop mechanistic hypotheses and mathematical models. While there have been many excellent empirical and theoretical investigations, there has been little attempt to synthesize this diverse but interrelated area of biology. In an effort to fill this void, Scaling in Biology, the first general treatment of scaling in biology in over 15 years, covers a broad spectrum of the most relevant topics in a series of chapters written by experts in the field. Some of those topics discussed include allometry and fractal structure, branching of vascular systems of mammals and plants, biomechanical and life history of plants, invertebrates and vertebrates, and species-area patterns of biological diversity. Many more examples are included within this text to complete the broader picture. Scaling in Biology conveys the diversity, promise, and excitement of current research in this area, in a format accessible to a wide audience of not only specialists in the various sub-disciplines, but also students and anyone with a serious interest in biology.
Categories: Medical

Mitigating Environmental Impact of Petroleum Lubricants

Mitigating Environmental Impact of Petroleum Lubricants

... such as diamond films • Have high resistance to deterioration in ... and wear than for hydrodynamic lubrication • Have poor heat dissipation with low ...

Author: Ignatio Madanhire

Publisher: Springer

ISBN: 9783319313580

Category: Technology & Engineering

Page: 239

View: 635

This book explores effective environmental impact mitigation for petroleum-based lubricants to reduce their negative persistence during usage and upon end-of-life disposal. The book reviews the basic tribology of lubricants as well as initiatives that may enhance the environmental and economic effectiveness of lubricating oils from the composition design perspective across industries. Considering the blending, application, and disposal of petroleum lubricants in a holistic manner, the book presents and extends current best practices that minimize or eliminate adverse environmental impact throughout the product’s life cycle. The book reviews methods including: raw material substitution, minimizing oil losses during and after manufacturing, raw material and energy consumption reduction, and environmentally friendly applications of oil disposal as ways forward for cleaner and more effective production. This book provides readers with strategies for incorporating cleaner production practices into their operations – a benefit to both environmental legal compliance and business competitiveness – all the while preserving the environment for sustainable development. The book is therefore of interest to both manufacturers and consumers in the lubricants industry.
Categories: Technology & Engineering