Download or read book A Study of Directional Solidification of Facted Bi Sn Alloys in Microgravity written by R. Abbaschian 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 Morphological Stability of Faceted Bi Sn Alloys During Directional Solidification written by Dennis M. Gadonniex and published by . This book was released on 1995 with total page 386 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 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 Research Technology 1998 written by and published by DIANE Publishing. This book was released on with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Conference Publication written by and published by . This book was released on 1999 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Use of Solid state Seebeck Measurement as a Diagnostic Technique for the Study of Solidification of Bi 1atom Sn Alloy written by Yunfei Lian and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: This work on modeling of the structural Seebeck of Bi-Sn alloy is part of the NASA-MEPHISTO research program for the unidirectional solidification behavior of faceted Bi-1%Sn alloy grown under microgravity conditions. For the space experiments, Seebeck technique was used to measure the interface temperature from the Seebeck voltage generated across two solid-liquid interfaces during solidification. However, the total Seebeck voltage measured represents three components of kinetic, compositional and structural Seebeck voltage. A series of experiments were thus conducted to measure the structural Seebeck voltage generated by the sample solidified in space. Numerical simulations are used to determine the structural Seebeck coefficient. For planar growth at low velocities, the Seebeck coefficients were found to be -0.055 mv/K, and the Seebeck coefficients vary from -0.03 mv/K to -0.01 mv/K with the increase in the growth rate and formation of cellular structure. The finer the cell spacings are in the sample, the smaller the absolute value of the Seebeck coefficient. These structural Seebeck coefficients were then used to determine the structural Seebeck voltage generated behind the interface during the solidification in the space experiments. The results show that the structural Seebeck contributes greatly to the overall voltage measured during solidification. The results were finally used to obtain an estimate for the kinetic undercooling for the Bi-Sn binary alloy during unidirectional solidification.
Download or read book Encyclopedia of Chemical Processing written by Sunggyu Lee and published by Taylor & Francis US. This book was released on 2006 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collecting information of vital interest to chemical, polymer, mechanical, electrical, and civil engineers, as well as chemists and chemical researchers, this "Encyclopedia "supplies nearly 350 articles on current design, engineering, science, and manufacturing practices-offering expertly written articles on technologies at the forefront of the field to maximize and enhance the research and production phases of current and emerging chemical manufacturing practices and techniques.
Download or read book Solidification and Microgravity written by P. Bárczy and published by . This book was released on 1991 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volume presents invited papers on topics of current interest.
Download or read book NASA Microgravity Materials Science Conference written by and published by . This book was released on 1999 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 33rd Aerospace Sciences Meeting Exhibit written by and published by . This book was released on 1995 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shuttle Flight Experiment on USMP 4 In Situ Monitoring of Crystal Growth Using MEPHISTO written by and published by . This book was released on 2001 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Modeling of Solidification in Space With MEPHISTO 4 written by and published by . This book was released on 1998 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASME Proceedings of the 7th AIAA ASME Joint Thermophysics and Heat Transfer Conference Heat and mass transfer in energy systems Heat transfer in turbomachinery Transport phenomena in manufacturing and materials processing Thermal management of electronics Advances in high heat flux heat transfer for electronics written by and published by . This book was released on 1998 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solidification Science and Processing written by I. Ohnaka and published by Minerals, Metals, & Materials Society. This book was released on 1996 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of selected and refereed papers presented in the Solidification Science and Processing Symposium of the International Symposia on Advanced Materials and Technology for the 21st Century held in Honolulu, Hawaii, December 13-15, 1995.
Download or read book Directional Solidification Studies of Pb Bi Peritectic Alloys written by Bor-Ching Fuh and published by . This book was released on 1984 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
