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Author : Miloš Müller
Publisher :
ISBN 13 : 9788073722418
Total Pages : 108 pages
Book Rating : 4.7/5 (224 download)
Download or read book Dynamic Behaviour of Cavitation Bubbles Generated by Laser written by Miloš Müller and published by . This book was released on 2008 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Technická univerzita v Liberci. Katedra energetických zařízení
Publisher :
ISBN 13 : 9788073722760
Total Pages : 27 pages
Book Rating : 4.7/5 (227 download)
Download or read book Dynamic Behaviour of Laser-inducet Cavitation Bubbles written by Technická univerzita v Liberci. Katedra energetických zařízení and published by . This book was released on 2008 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Can F. Delale
Publisher : Springer Science & Business Media
ISBN 13 : 3642342965
Total Pages : 393 pages
Book Rating : 4.6/5 (423 download)
Download or read book Bubble Dynamics and Shock Waves written by Can F. Delale and published by Springer Science & Business Media. This book was released on 2012-10-07 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the interplay of bubble dynamics and shock waves, covering shock wave emission by laser generated bubbles, pulsating bubbles near boundaries, interaction of shock waves with bubble clouds, applications in shock wave lithotripsy, and more.
Author : Christopher E. Brennen
Publisher : Cambridge University Press
ISBN 13 : 1107644763
Total Pages : 269 pages
Book Rating : 4.1/5 (76 download)
Download or read book Cavitation and Bubble Dynamics written by Christopher E. Brennen and published by Cambridge University Press. This book was released on 2014 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cavitation and Bubble Dynamics deals with fundamental physical processes of bubble dynamics and cavitation for graduate students and researchers.
Author : Koichi Terasaka
Publisher : CRC Press
ISBN 13 : 1000333639
Total Pages : 294 pages
Book Rating : 4.0/5 (3 download)
Download or read book Ultrafine Bubbles written by Koichi Terasaka and published by CRC Press. This book was released on 2021-09-15 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrafine bubbles (UFBs) are gas-filled bubbles with a diameter smaller than 1 μm. They are sometimes called bulk nanobubbles because these are not on a solid surface but inside a bulk liquid (water). They are already being used in commercial processes such as cleaning and plant cultivation. However, many mysteries still exist with respect to UFBs, such as mechanisms of stability, OH radical formation, and biological and medical effects. This is the first book on UFBs that reviews research done on them. It is helpful for those interested in the fundamentals of this emerging field and its applications, including cleaning, biological, medical, and dental students and researchers.
Author : David Aaron Steinmetz
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.:/5 (395 download)
Download or read book Laser Induced Cavitation written by David Aaron Steinmetz and published by . This book was released on 1992 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kyuichi Yasui
Publisher : Springer
ISBN 13 : 3319682377
Total Pages : 131 pages
Book Rating : 4.3/5 (196 download)
Download or read book Acoustic Cavitation and Bubble Dynamics written by Kyuichi Yasui and published by Springer. This book was released on 2017-10-26 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: This brief explains in detail fundamental concepts in acoustic cavitation and bubble dynamics, and describes derivations of the fundamental equations of bubble dynamics in order to support those readers just beginning research in this field. Further, it provides an in-depth understanding of the physical basis of the phenomena. With regard to sonochemistry, the brief presents the results of numerical simulations of chemical reactions inside a bubble under ultrasound, especially for a single-bubble system and including unsolved problems. Written so as to be accessible both with and without prior knowledge of fundamental fluid dynamics, the brief offers a valuable resource for students and researchers alike, especially those who are unfamiliar with this field. A grasp of fundamental undergraduate mathematics such as partial derivative and fundamental integration is advantageous; however, even without any background in mathematics, readers can skip the equations and still understand the fundamental physics of the phenomena using the book’s wealth of illustrations and figures. As such, it is also suitable as an introduction to the field.
Author : Zhaohao Li
Publisher : Springer Nature
ISBN 13 : 3031542460
Total Pages : 91 pages
Book Rating : 4.0/5 (315 download)
Download or read book Cavity Dynamics and Splashing Mechanism in Droplets written by Zhaohao Li and published by Springer Nature. This book was released on with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jean-Pierre Franc
Publisher : Springer Science & Business Media
ISBN 13 : 1402022336
Total Pages : 321 pages
Book Rating : 4.4/5 (2 download)
Download or read book Fundamentals of Cavitation written by Jean-Pierre Franc and published by Springer Science & Business Media. This book was released on 2006-01-22 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book treats cavitation, which is a unique phenomenon in the field of hyd- dynamics, although it can occur in any hydraulic machinery such as pumps, propellers, artificial hearts, and so forth. Cavitation is generated not only in water, but also in any kind of fluid, such as liquid hydrogen. The generation of cavitation can cause severe damage in hydraulic machinery. Therefore, the prevention of cavitation is an important concern for designers of hydraulic machinery. On the contrary, there is great potential to utilize cavitation in various important applications, such as environmental protection. There have been several books published on cavitation, including one by the same authors. This book differs from those previous ones, in that it is both more physical and more theoretical. Any theoretical explanation of the cavitation phenomenon is rather difficult, but the authors have succeeded in explaining it very well, and a reader can follow the equations easily. It is an advantage in reading this book to have some understanding of the physics of cavitation. Therefore, this book is not an introductory text, but a book for more advanced study. However, this does not mean that this book is too difficult for a beginner, because it explains the cavitation phenomenon using many figures. Therefore, even a beginner on cavitation can read and can understand what cavitation is. If the student studies through this book (with patience), he or she can become an expert on the physics of cavitation.
Author : Phoevos Koukouvinis
Publisher : Elsevier
ISBN 13 : 0128233982
Total Pages : 355 pages
Book Rating : 4.1/5 (282 download)
Download or read book Cavitation and Bubble Dynamics written by Phoevos Koukouvinis and published by Elsevier. This book was released on 2021-09-24 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Author : John R. Blake
Publisher : Springer Science & Business Media
ISBN 13 : 9401109389
Total Pages : 485 pages
Book Rating : 4.4/5 (11 download)
Download or read book Bubble Dynamics and Interface Phenomena written by John R. Blake and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains papers presented at the IUTAM Symposium on Bubble Dynamics and Interface Phenomena held at the University of Birmingham from 6-9 September 1993. In many respects it follows on a decade later from the very successful IUTAM Symposium held at CALTECH in June 1981 on the Mechanics and physics of bubbles in liquids which was organised by the late Milton Plesset and Leen van Wijngaarden. The intervening period has seen major development with both experiment and theory. On the experimental side there have been ad vances with very high speed photography and data recording that provide detailed information on fluid and interface motion. Major developments in both computer hardware and software have also led to extensive improvement in our understand ing of bubble and interface dynamics although development is still limited by the sheer complexity of the laminar and turbulent flow regimes often associated with bubbly flows. The symposium attracts wide and extensive interest from engineers, physical, chemical, biological and medical scientists and applied mathematicians. The sci entific committee sought to achieve a balance between theory and experiment over a range of fields in bubble dynamics and interface phenomena. It was our intention to emphasise both the breadth and recent developments in these various fields and to encourage cross-fertilisation of ideas on both experimental techniques and theo retical developments. The programme, and the proceedings recorded herein, cover bubble dynamics, sound and wave propagation, bubbles in flow, sonoluminescence, acoustic cavitation, underwater explosions, bursting bubbles and ESWL.
Author : Qian Feng
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (115 download)
Download or read book Optical-fiber-based Laser-induced Cavitation for Dynamic Mechanical Characterization of Soft Materials written by Qian Feng and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In the laser-induced cavitation (LIC) technique, a vapor-gas cavity is generated in water, or a soft material by focusing an intense laser pulse into the sample. The high-strain-rate mechanical properties of these samples can be investigated through a real-time size measurement of the expanding cavity bubble. Although this LIC technique has been applied to multiple research fields such as mechanical, biological and medical areas. It is possible to simplify and improve this LIC method by introducing optical-fibers. In this approach, we propose to employ an optical-fiber to deliver the intense laser pulse to an arbitrary position of an optical opaque specimen. At the same time, we also attempt to generate LIC at one end of the optical-fiber. This optical-fiber based LIC is achieved by dip-coating of the laser absorbing film on the fiber end. Thus, the film can absorb the laser pulse and generate LIC within the sample. In this study, the development of the coating material, the introduction of the optical-fiber into the existing LIC system, and the optical-fiber based LIC experiments are performed to characterize high-strain-rate mechanical properties of soft materials. We investigate the coating conditions and verify the consistency of the ablation based on the optimized coating materials. By conducting LIC experiments with gelatin samples, the feasibility of developed LIC method is investigated, LIC events are successfully formed at the fiber end which is inserted into the sample, and the rapid expanding dynamics are imaged with ultrafast stroboscopic microscopy. Using the multiple-exposure images, the expanding speeds and maximum cavity sizes are quantified to provide high-strain-rate characteristics of the soft materials. The inconsistency of the cavitation behavior resulted by the fluctuation of the coating condition and the high power intense laser conducting optical-fiber destruction can be improved by developing new coating method and new protective coating on the fiber end in the future.
Author : Amir Faghri
Publisher : Academic Press
ISBN 13 :
Total Pages : 1072 pages
Book Rating : 4.3/5 (91 download)
Download or read book Transport Phenomena in Multiphase Systems written by Amir Faghri and published by Academic Press. This book was released on 2006 with total page 1072 pages. Available in PDF, EPUB and Kindle. Book excerpt: Engineering students in a wide variety of engineering disciplines from mechanical and chemical to biomedical and materials engineering must master the principles of transport phenomena as an essential tool in analyzing and designing any system or systems wherein momentum, heat and mass are transferred. This textbook was developed to address that need, with a clear presentation of the fundamentals, ample problem sets to reinforce that knowledge, and tangible examples of how this knowledge is put to use in engineering design. Professional engineers, too, will find this book invaluable as reference for everything from heat exchanger design to chemical processing system design and more. * Develops an understanding of the thermal and physical behavior of multiphase systems with phase change, including microscale and porosity, for practical applications in heat transfer, bioengineering, materials science, nuclear engineering, environmental engineering, process engineering, biotechnology and nanotechnology * Brings all three forms of phase change, i.e., liquid vapor, solid liquid and solid vapor, into one volume and describes them from one perspective in the context of fundamental treatment * Presents the generalized integral and differential transport phenomena equations for multi-component multiphase systems in local instance as well as averaging formulations. The molecular approach is also discussed with the connection between microscopic and molecular approaches * Presents basic principles of analyzing transport phenomena in multiphase systems with emphasis on melting, solidification, sublimation, vapor deposition, condensation, evaporation, boiling and two-phase flow heat transfer at the micro and macro levels * Solid/liquid/vapor interfacial phenomena, including the concepts of surface tension, wetting phenomena, disjoining pressure, contact angle, thin films and capillary phenomena, including interfacial balances for mass, species, momentum, and energy for multi-component and multiphase interfaces are discussed * Ample examples and end-of-chapter problems, with Solutions Manual and PowerPoint presentation available to the instructors
Author : Emil Brujan
Publisher : Springer Science & Business Media
ISBN 13 : 3642153437
Total Pages : 274 pages
Book Rating : 4.6/5 (421 download)
Download or read book Cavitation in Non-Newtonian Fluids written by Emil Brujan and published by Springer Science & Business Media. This book was released on 2010-09-28 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-Newtonian properties on bubble dynamics and cavitation are fundamentally different from those of Newtonian fluids. The most significant effect arises from the dramatic increase in viscosity of polymer solutions in an extensional flow, such as that generated about a spherical bubble during its growth or collapse phase. In addition, many biological fluids, such as blood, synovial fluid, and saliva, have non-Newtonian properties and can display significant viscoelastic behaviour. This monograph elucidates general aspects of bubble dynamics and cavitation in non-Newtonian fluids and applies them to the fields of biomedicine and bioengineering. In addition it presents many examples from the process industries. The field is strongly interdisciplinary and the numerous disciplines involve have and will continue to overlook and reinvent each others’ work. This book helps researchers to think intuitively about the diverse physics of these systems, to attempt to bridge the various communities involved, and to convey the interest, elegance, and variety of physical phenomena that manifest themselves on the micrometer and microsecond scales.
Author : Noriah Bidin
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (969 download)
Download or read book High Speed Photography of Laser Induced Cavitation-bubble Dynamics in the Neighbourhood of a Solid Boundary written by Noriah Bidin and published by . This book was released on 1994 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser induced cavitation buble dynamics has been observed by high-speed photography. The bubble growth and contraction during the early phase of the first collapse was found to be of spherical form. A second shock wave is radiated during cavitation bubble collapse. A counterjet occured at the top of the bubble and protusion occured at the bottom part due to the Bjerkness effect. The impulsive pressure due to the impact of the jet on the solid surface was estimated to be 150 MPa with a pressure duration of 0.3 usec and the calculated stagnation pressure was 5 MPa. [Authors' abstract].
Author : Tianming Wu
Publisher :
ISBN 13 :
Total Pages : 424 pages
Book Rating : 4.:/5 (314 download)
Download or read book Bubble Mediated Focused Ultrasound written by Tianming Wu and published by . This book was released on 2007 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Cavitation is often the result of rapid and intense hyperthermia using high-intensity focused ultrasound (HIFU) to treat malignant tumors deep in tissue. With proper parameters, cavitation bubbles are very efficient in transforming acoustic energy into heat. In vivo and in vitro studies have shown that bubble enhanced heating can potentially increase HIFU efficacy. However, sporadic nucleation of bubbles and subsequent nonlinear oscillations allow uncontrolled cavitation to induce irregular lesions and other unpredictable and thus undesirable effects. This work takes a modeling approach to investigate the physical mechanisms necessary for developing bubble-mediated HIFU therapy with a satisfactory degree of predictability and controllability. Controlled nucleation is possible with a transient vapor cavity generated from a laser heated gold nano-particle in combination with proper acoustic conditions. Preliminary experimental studies in optically transparent gel phantoms have been conducted and results show that the combined use of laser, HIFU and nano-particles reduces the cavitation threshold significantly, and the temporal and spatial characteristics of cavitation events can be controlled by the sound-light interaction mediated with the particles. A mathematical model for particle heating, vapor bubble nucleation and the subsequent bubble dynamics is constructed to predict cavitation thresholds of laser and HIFU energy, and results are comparable with experiments. A parametric study is presented to investigate the effects of particle size and laser pulse length for the optimization of this technique to generate cavitation on demand. In another effort, the interactions of acoustic propagation and the thermal effects in the presence of cavitation bubbles (mostly gas) and boiling bubbles (mostly vapor) are modeled. By introducing temperature dependent viscosity, surface tension coefficient and vapor pressure into the nonlinear gas bubble dynamics, the variation of the bubble radial oscillations, size distributions and subsidiary heating due to the temperature elevation are studied. A continuum bubbly medium is constructed with effective sound speed and attenuation derived from the temperature dependent nonlinear gas bubble When boiling occurs, the vapor bubbles are simply modeled as pressure release cavities. An iterative simulation for acoustic, cavitation(boiling) and thermal fields is then constructed to model the lesion developments, with updating time scales estimated from intrinsic space-time scales related to the evolution of bubble clusters observed from experiments. Results indicate that cavitation enhances ultrasonic absorption and creates larger and wider lesions in a shorter time. The scattering due to the impedance mismatch in the cavitation zone is responsible for the irregular lesions. The heating from cavitation bubbles also accelerates the emerging of vapor bubbles and boiling. The current scheme has exhibited its effectiveness in predicting the position, shape and size of an evolving lesion during bubble-mediated HIFU therapy, given the thermal and acoustical properties of the target tissue and the ultrasonic insonation parameters such as focal intensity and exposure duration.
Author : Jack Elias Abboud
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.:/5 (787 download)
Download or read book The Liquid Micro Jet from Laser Induced Cavitation Bubbles written by Jack Elias Abboud and published by . This book was released on 2009 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: A cavitation bubble grows spherically in an infinite medium to a maximum radius, collapses to a minimum volume while retaining its spherical shape, and then may rebound for a second or more oscillations before it disintegrates into many mic ro bubbles. However, when the bubble collapses above a blank solid boundary, a f ast liquid micro-jet is formed owing to the asymmetry of the surrounding flow fi eld. The jet starts by penetrating the upper bubble wall, impacts the lower side of the bubble and then continues its path towards the wall, leading to a deform ation in the bubble. This fast micro-jet seems to be responsible for cavitation erosion and damage in hydro-machinery. In this work, we are motivated by the fas t liquid micro-jet formation from laser-induced cavitation bubbles and the poten tial for cultivating this jet for a variety of applications such as micro surger y of soft tissue. If a hole is intentionally drilled in the solid boundary under neath the collapsing bubble, it is hypothesized that the jet might pass through and be cultivated on the other side of the hole. Bubbles will be generated in an infinite medium, as well as above blank and drilled solid boundaries. Investiga tions will be focused on the dynamics of the bubble and jet, as a function of th eir distance to the wall for the case of blank solid boundary, and as function o f the hole diameter once a hole is present in the wall.
