Download or read book Effect of Substrate Properties on Molten Metal Droplet Impact written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Substrate Properties on Molten Metal Droplet Impact written by Saeid Shakeri Siavoshani and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The impact of molten metal droplets on a flat surface was studied experimentally. A single shot photographic technique was used to photograph droplet impact, and the spread factor and number of fingers around a splashing drop were measured from these photographs. Experiments were done using stainless steel and glass substrates with different roughness. The stainless steel surface temperature was varied from 25°C to 240°C. The initial temperature of tin droplets was maintained at either 246°C or 384°C. Some experiments were done on the impact of molten zinc droplets. A simple energy conservation model was used to estimate the thermal contact resistance between the droplet and surface. Increasing surface roughness was found to increase thermal contact resistance. Increasing surface roughness reduced the number of fingers while increasing their size. When one droplet lands on another, the final splat shape depends on the distance between droplet centers.
Download or read book Impact and Freezing of Molten Tin Droplets on a Solid Surface written by Rabindra Bhola and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collision and freezing of molten tin droplets on a surface was studied. The objectives of this work were: first to examine the effect of substrate temperature, substrate material, and substrate geometry on droplet impact dynamics; second, to measure surface temperature variation during impact to estimate the thermal contact resistance at the droplet/substrate interface; and finally, to propose an analytical model to estimate solidification effect on the maximum droplet spread. Impacts on a stainless steel surface set at different temperatures showed significant effect of solidification on droplet impact; solidification restricted droplet motion, particularly in recoil. Substrate material had a less dramatic effect on droplet impact dynamics. The model of maximum spread with the effect of solidification agreed well with the experiments. Results of the images impacting on the step and incline surfaces showed complex fluid flow which can only be simulated by a numerical model.
Download or read book Drop Surface Interactions written by Martin Rein and published by Springer. This book was released on 2014-05-04 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive overview of fluid mechanical, thermal and physico-chemical aspects of drop-surface interactions. Basic physical mechanisms pertaining to free-surface flow phenomena characteristic of drop impact on solid and liquid surfaces are explained emphasizing the importance of scaling. Moreover, physico-chemical fundamentals relating to a forced spreading of complex solutions, analytical tools for calculating compressibility effects, and heat transfer and phase change phenomena occurring during solidification and evaporation processes, respectively, are introduced in detail. Finally, numerical approaches particularly suited for modeling drop-surface interactions are consisely surveyed with a particular emphasis on boundary integral methods and Navier-Stokes algorithms (volume of fluid, level set and front tracking algorithms). The book is closed by contributions to a workshop on Drop-Surface Interactions held at the International Centre of Mechanical Sciences.
Download or read book Blast Cleaning Technology written by A. Momber and published by Springer Science & Business Media. This book was released on 2007-12-15 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive monograph in blast cleaning technology, this book provides a comprehensive review of the technology, with an emphasis on practical applications. The author first systematically and critically reviews the theory behind the technology. Next you’ll learn about the state of current blast cleaning, surface quality aspects, and the effects of blast cleaning on the performance of applied coatings. You’ll also discover many of today’s cutting-edge applications, including micro-machining, polishing, maintenance, and surface preparation for coating applications. Finally, the author describes recent advanced applications in the machining industry, including blast cleaning-assisted laser milling.
Download or read book Spreading Solidification and Remelting Behavior of Liquid Metal Droplets Sequentially Impinging Onto a Metal Substrate written by Lister Manohar Pinto and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The fluid dynamics and simultaneous solidification of two successive molten metal droplets impacting a flat substrate is investigated numerically. The primary objective is to investigate the effects of initial droplet and substrate temperature, and the latent heat of substrate material, on the spreading, solidification and remelting of molten tin droplets impacting a substrate of the same material. A robust fluid-flow solver that is capable of modeling rapidly deforming free surfaces involving a moving phase-change boundary is employed in the study. The Navier-Stokes equations are solved using a finite volume formulation. A two-step projection method is used to solve for incompressible flow. The free surfaces of the droplets are tracked by the volume-of-fluid method with a second order accurate piecewise linear scheme. The surface tension force is modeled by the continuum surface flow model. The energy equation is modeled using an enthalpy-based formulation. The predictive model used in this study enables the optimization of operating parameters to reveal impinging droplet temperatures and initial substrate temperatures that promote substrate remelting, possess good flow characteristics and yet, minimize thermally induced stresses and excessive remelting of previously deposited material. The results of this investigation are relevant to droplet deposition technologies involving large diameter droplets at low velocities.
Download or read book Proceedings of the 2002 ASME Joint U S European Fluids Engineering Conference written by Upendra S. Rohatgi and published by . This book was released on 2002 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1992 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metal Sprays and Spray Deposition written by Hani Henein and published by Springer. This book was released on 2017-07-22 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes and illustrates metal spray and spray deposition from the process engineering, metallurgical, and application viewpoints. The authors include step-by-step fundamental information for the metal spray process and detail current engineering developments and applications. They offer industry insight on non-equilibrium solidification processes for yielding stable metal structures and properties.
Download or read book Advances in Materials Mechanics and Manufacturing written by Fakher Chaari and published by Springer Nature. This book was released on 2019-09-17 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports on cutting-edge findings concerning characterization of material behavior, material modeling and simulation, and applications in the field of manufacturing. Based on the second International Conference on Advanced Materials Mechanics & Manufacturing, A3M2018, organized by the Laboratory of Mechanics, Modeling and Manufacturing (LA2MP) of the National School of Engineers of Sfax, Tunisia, the book covers a variety of topics, such as experimental analysis of material plasticity and fatigue, numerical simulation of material behavior, and optimization of manufacturing processes, such as cutting and injection, among others. It offers a timely snapshot on current research and applications, offering a bridge to facilitate communication and collaboration between academic and industrial researchers.
Download or read book Impact Velocity and Surface Temperature Effects on the Collision of a Molten Tin Droplet on a Solid Surface written by Shiraz Dean Aziz and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation was performed on the splashing and freezing of molten tin droplets on a stainless steel surface. The diameter of the droplets was 2.7 mm, and the impact velocity ranged from 1.0 m/s to 4.0 m/s. The substrate temperature was varied from 25$\sp\circ$C to 240$\sp\circ$C. Droplet impact was photographed using a 35 mm camera; both the splat diameter and liquid-solid contact angle were measured from these photographs. The substrate temperature under the impacting droplet was measured using a fast response thermocouple. The heat transfer coefficient during the first 0.5 ms of impact was obtained by matching measured surface temperature variation with an analytical solution. A simple energy conservation model was used to predict the maximum spreading of the droplet during impact. The predictions agreed well with experimental values. Instabilities were observed on the periphery of the droplet, which led to the formation of a finger pattern at velocities above 1.0 m/s. A model based on the Rayleigh-Taylor instability was used to predict the number of fingers around the periphery of the droplet.
Download or read book Numerical Modeling and Experimental Testing of Metal Droplet Deposition Heat Transfer with Substrate Remelting as Applied to the Microcasting Deposition Process written by Cristina H. Amon and published by . This book was released on 1994 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "A combined analytical, numerical and experimental study is reported on the solidification of metal droplets impacting on a similar substrate. This study supports a novel, thermal shape deposition process, referred to as microcasting, capable of rapidly forming near net- shape objects. Key factors in the production of high quality, metal objects are the creation of metallurgical bonding through substrate remelting, the control of cooling rates of both the substrate and the deposited material, and the minimization of residual stresses resulting from temperature gradients during deposition. The primary goal is to minimize droplet size and impact superheat, while achieving superficial substrate remelting. A mixed Lagrangian-Eulerian numerical model calculates substrate remelting and deposition temperature histories to investigate the required deposition temperatures and the effect of operating conditions on remelting. An order of magnitude analysis of the time scales involved in the deposition and solidification processes is presented to justify model simplifications. Modeled results are compared with analytical solutions during the initial stages of droplet deposition and substrate remelting. Experiments are conducted with molten, low carbon, manganese steel droplets, generated by the microcasting process, impinging on a carbon steel substrate, and with stainless steel droplets impinging on a stainless steel substrate. The experiments, which complement the analytical solutions by providing comparative results later in the deposition cooling process, verify the model by directly measuring cooling rates through thermocouple measurements, and indirectly measuring remelting depth with metallographic examinations. Numerical results indicate that the heat transfer from the droplet to the substrate dominates the solidification and cooling process. In addition, the heat transfer coefficient at the droplet/substrate interface is found to be strongly time dependent during substrate remelting and solidification. Thus, accurate predictions of the remelting phenomenon and cooling rates necessary for optimizing object properties require a detailed understanding of the interface heat transfer process and combined modeling of the droplet and substrate."
Download or read book Thermal Spray 2007 Global Coating Solutions Proceedings of the 2007 International Thermal Spray Conference written by Edited by Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, Ghislain Montavon and published by ASM International. This book was released on with total page 1246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Micro Process and Quality Control of Plasma Spraying written by Guozheng Ma and published by Springer Nature. This book was released on 2022-09-08 with total page 679 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the basic physical process and chemical reaction of plasma spraying particle melting, flight and deposition. It introduces the basic scientific contents such as the basic characteristics and spraying principle of plasma arc, the interaction between spraying particles in flight section and plasma jet, the spreading and solidification behavior of single droplet and the performance test of flat particles, macro performance evaluation and quality optimization of coating. The typical applications of plasma spraying coating and the new developing direction of plasma spraying technology are summarized. This book will be helpful for the graduate students, researchers, as well as engineers in the field of plasma spray.
Download or read book Advances in Heat Transfer written by James P. Hartnett and published by Elsevier. This book was released on 2007-10-09 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Heat Transfer fills the information gap between regularly scheduled journals and university-level textbooks by providing wide-ranging and in-depth review articles. Put simply, this book is essential reading for all mechanical, chemical and industrial engineers working in the field of heat transfer in graduate schools or industry. The articles, which serve as a broad review for experts in the field, will also be of great interest to non-specialists who need to keep up-to-date with the results of the latest research. - Provides an overview of review articles on topics of current interest - Bridges the gap between academic researchers and practitioners in industry - A long-running and prestigious series
Download or read book Wettability at High Temperatures written by N. Eustathopoulos and published by Elsevier. This book was released on 1999-11-24 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this book is to bring together current scientific understanding of wetting behaviour that has been gained from theoretical models and quantitative experimental observations. The materials considered are liquid metals or inorganic glasses in contact with solid metals or ceramics at temperatures of 200-2000oC. Wetting has been a significant scientific concern for the last two centuries and reference will be made to classical work by nineteenth century scientists such as Dupré, Laplace and Young that was validated by observations of the behaviour of chemically inert ambient temperature systems.In attempting to achieve the aims of the book, the text has been divided into ten Chapters that can be grouped into four stages of presentation. The first stage comprises two Chapters that review established and newly developed models for their relevance to wetting behaviour at high temperatures, including recent models that encompass the role of chemical reactions at the solid/liquid interfaces. Attention is paid both to equilibrium wetting behaviour (Chapter 1) and to the factors that control the approach to equilibrium (Chapter 2). Then follow Chapters concerned with experimental techniques for scientific measurement of the extent of wetting (Chapter 3) and with the surface energy data for both metals and non-metals that are essential for quantitative interpretation of wetting behaviour (Chapter 4). Descriptions of experimentally determined and quantified wetting behaviour are presented and interpreted in the third part comprising five Chapters dealing with the characteristics of metal/metal, metal/oxide, metal/non-oxide, metal/carbon and molten glass/solid systems. The book concludes with a Chapter commenting on the role of wetting behaviour in joining similar and dissimilar materials by liquid route techniques.
Download or read book A Study of Splashes written by A.M. Worthington and published by BoD – Books on Demand. This book was released on 2018-04-05 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reproduction of the original: A Study of Splashes by A.M. Worthington
