Download or read book Numerical Simulations of Crystal Growth of an Alloy Under Microgravity Conditions written by James E. Simpson and published by BiblioGov. This book was released on 2013-08 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The directional solidification of a dilute binary alloy (Bi-1.0 at.%Sn)is investigated. Results are obtained at a gravity level of I pg. Computations are performed in two dimensions with a fixed, non-uniform grid. The simulation involves a solution of the species concentration equation (modified to account for solute rejection at the interface) and energy equation (modified to account for phase-change) for both the solid and liquid phases, in addition to the constitutive equations for describing convective flow in the melt. The effects of conductive heat transfer in the ampoule and in a capillary tube in the sample are included. To gauge the effects of including this growth capillary tube in the apparatus, simulations both with and without the capillary tube are presented and compared. Fully transient simulations have been performed; no simplifying steady-state approximations are used, however, the influence of solute on the melting temperature at the interface is not included. Both thermal and solutal convective cells are seen to form. Convective velocities are significantly damped inside the capillary, causing less segregation due to convection. As solidification proceeds beyond the capillary tube, longitudinal segregation arises as a result of the change in cross-sectional area of solidifying material. The magnitudes of the velocities in this cell increase significantly once the solid/liquid front passes beyond the end of the capillary tube; this causes a corresponding increase in the level of radial solute segregation in the solidified material.
Download or read book Fluids Materials and Microgravity written by Marcello Lappa and published by Elsevier. This book was released on 2004-12-09 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: Each year, universities and research centres – most particularly the major space agencies such as NASA, ESA, and NASDA – devote a vast amount of time and money into the research of materials behaviour and production in microgravity. Recently, the possibility of creating special alloys, inorganic and organic crystals, as well as biological (living) tissues in this condition has been investigated. Fluids, Materials and Microgravity provides a solid basis of established knowledge – through literature, fundamental studies, experimental methods, numerical (basic and sophisticated) techniques – as well as the latest in research advancements. Important for the prediction of material behaviour when exposed to the environment of space, this book explores the new knowledge provided by microgravity-based studies in producing unique inorganic, and organic materials on Earth (and in designing related new technological processes). A vital resource for any scientists interested in the understanding and modelling of the new important physical mechanisms disclosed by microgravity research, and in their possible effect on the production and behaviour of materials both in space and on Earth. A vital resource for any scientists interested in the effect of microgravity on the production and behaviour of materials. Covers typical fluid-dynamic disturbances which can affect the behaviour and final quality of materials both in space and on Earth, and possible strategies to contain their effects Thorough attention is devoted to the most promising and innovative technological processes provided by microgravity experimentation Information is provided through application-based engineering models, as well as mathematical frameworks, to facilitate a deeper understanding of physical mechanisms
Download or read book Numerical Simulation of Crystal Growth by Physical Vapor Transport in Microgravity Environments written by Ning Zhou and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microgravity Science and Applications Bibliography 1991 Revision written by United States. Office of Space Science and Applications and published by . This book was released on 1992 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulk Crystal Growth of Electronic Optical and Optoelectronic Materials written by Peter Capper and published by John Wiley & Sons. This book was released on 2005-10-31 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: A valuable, timely book for the crystal growth community, edited by one of the most respected members in the field. Contents cover all the important materials from silicon through the III-V and II-IV compounds to oxides, nitrides, fluorides, carbides and diamonds International group of contributors from academia and industry provide a balanced treatment Includes global interest with particular relevance to: USA, Canada, UK, France, Germany, Netherlands, Belgium, Italy, Spain, Switzerland, Japan, Korea, Taiwan, China, Australia and South Africa
Download or read book Physics of Fluids in Microgravity written by Rodolfo Monti and published by CRC Press. This book was released on 2002-01-10 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a microgravity experiment, the conditions prevalent in fluid phases can be substantially different from those on the ground and can be exploited to improve different processes. Fluid physics research in microgravity is important for the advancement of all microgravity scients: life, material, and engineering. Space flight provides a unique laboratory that allows scientists to improve their understanding of the behaviour of fluids in low gravity, allowing the investigation of phenomena and processes normally masked by the effects of gravity and thus difficult to study on Earth. Physics of Fluids in Microgravity provides a clear view of recent research and progress in the different fields of fluid research in space. The topics presented include bubles and drops dynamics, Maragoni flows, diffustion and thermodiffusion, solidfication,a nd crystal growth. The results obtained so far are, in some cases, to be confirmed by extensive research activities on the International Space station, where basic and applied microgravity experimentation will take place in the years to come.
Download or read book Turbulent Bubble Suspensions and Crystal Growth in Microgravity written by Pau Bitlloch Puigvert and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physical Science Under Microgravity Experiments on Board the SJ 10 Recoverable Satellite written by Wenrui Hu and published by Springer Nature. This book was released on 2019-10-16 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the physical science experiments in a space microgravity environment conducted on board the SJ-10 recoverable satellite, which was launched on April 6th, 2016 and recovered on April 18th, 2016. The experiments described were selected from ~100 proposals from various institutions in China and around the world, and have never previously been conducted in the respective fields. They involve fluid physics and materials science, and primarily investigate the kinetic properties of matter in a space microgravity environment. The book provides a comprehensive review of these experiments, as well as the mission’s execution, data collection, and scientific outcomes.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Simulation of Heat and Mass Transport During Space Crystal Growth with MEPHISTO written by and published by . This book was released on 1995 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fourth United States Microgravity Payload written by and published by . This book was released on 1999 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulk Crystal Growth written by D. T. J. Hurle and published by Elsevier. This book was released on 2016-06-06 with total page 671 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 2 is divided into 2 parts. Part A reviews the principal techniques used for bulk single crystal growth from melt, solution and vapour and for industrial mass crystallisation starting, in chapter 1, with nature's techniques. The growth of synthetic crystals of a wide range of materials for research and commercial use is covered in depth, with emphasis placed on those techniques which are of current importance: techniques of only historical interest have not been included. Part B covers the basic mechanisms and dynamics of melt and solution growth covering segregation, melt convection, stress in the cooling crystal, polyphase solidification, growth in gels, spherulitic crystallisation and the numerical modelling of Bridgman and Czochralski growth processes.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1996 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Springer Handbook of Crystal Growth written by Govindhan Dhanaraj and published by Springer Science & Business Media. This book was released on 2010-10-20 with total page 1823 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the years, many successful attempts have been chapters in this part describe the well-known processes made to describe the art and science of crystal growth, such as Czochralski, Kyropoulos, Bridgman, and o- and many review articles, monographs, symposium v- ing zone, and focus speci cally on recent advances in umes, and handbooks have been published to present improving these methodologies such as application of comprehensive reviews of the advances made in this magnetic elds, orientation of the growth axis, intro- eld. These publications are testament to the grow- duction of a pedestal, and shaped growth. They also ing interest in both bulk and thin- lm crystals because cover a wide range of materials from silicon and III–V of their electronic, optical, mechanical, microstructural, compounds to oxides and uorides. and other properties, and their diverse scienti c and The third part, Part C of the book, focuses on - technological applications. Indeed, most modern ad- lution growth. The various aspects of hydrothermal vances in semiconductor and optical devices would growth are discussed in two chapters, while three other not have been possible without the development of chapters present an overview of the nonlinear and laser many elemental, binary, ternary, and other compound crystals, KTP and KDP. The knowledge on the effect of crystals of varying properties and large sizes. The gravity on solution growth is presented through a c- literature devoted to basic understanding of growth parison of growth on Earth versus in a microgravity mechanisms, defect formation, and growth processes environment.
Download or read book Modelling of Transport Phenomena in Crystal Growth written by Janusz S. Szmyd and published by Computational Mechanics. This book was released on 2000 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The large crystals of semiconducting and superconducting materials used for electronic and optical devices are usually grown from the melt by Czochralski or Bridgman method and their quality is significantly affected by the melt flow and related heat and mass transfer. Recent intensive research activities in this area covering crystal growth in microgravity, crystal growth of superconducting materials, crystal growth in high pressure, the commercial development of pullers that can produce crystals with large diameters etc. have substantially raised the expectation for numerous new practical applications.
Download or read book Numerical Simulations of Crystal Growth written by Bayard K. Johnson and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
