Download or read book Measurements of the Heat Transfer Coefficient Distribution on Flat and Ribbed Surfaces with Interrupted Heating Using Thermochromic Liquid Crystals written by Jason D. Wolf and published by . This book was released on 1998 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of the heat transfer coefficient distribution on flat and ribbed surfaces with interrupted heating are presented. One application of this type of thermal boundary condition is the cooling of surface mounted modules in electronic packaging. Heating occurs at the modules, with no heating between the modules. The heat transfer measurements in the present study are made using the heated-coating method with a thermochromic liquid crystal (TLC). The "coating" is vacuum-deposited gold on a plastic sheet, which is mounted on a Styrofoam surface. The gold film is electrically heated to produce the surface heat flux. The surface temperature is measured by capturing color images of the TLC, using the hue technique. These surface temperature plots are transformed into heat transfer coefficient distributions on the surface of the models. Interrupted heating on the flat surface is obtained by heating strips perpendicular to the freestream flow, with insulated spaces between the strips. The ribbed surface is heated on the top of the ribs only, with insulated unheated cavities in-between. The results show that, as expected, the local heat transfer coefficient is higher on the heated strips of the flat surface interrupted heating case, than would be present at the same locations with a uniform heat flux. The interruption of the thermal boundary layer at each unheated section allows it to "reset", thereby causing the higher heat transfer on the following heated section. The ribbed model shows a slight increase in heat transfer on the ribs above that of the flat plate interrupted heating model. The cavities appear to introduce mixing that causes this change. The increase in h due to the ribs is small, however, when compared to the effect of the interrupted heating.
Download or read book Measurement of the Heat Transfer Coefficient Distribution on Flat and Ribbed Surface with Interrupted Healing Using Thermoelectronic Liquid Crystals written by J. D. Wolf and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of 3rd Electronics Packaging Technology Conference EPTC 2000 written by Thiam Beng Lim and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 2000 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: Topics covered by this title include: packaging materials; packaging trends; thermal design and modelling; solder joint metallurgy; process and reliability modelling; thermal characterization; materials characterization techniques; and assembly/manufacturing technologies.
Download or read book A New Technique for Dynamic Flow Visualization and Heat Transfer Measurement Using Liquid Crystal Thermography written by Agustin David Ochoa and published by . This book was released on 2004 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurements in Heat Transfer written by Ernst R. G. Eckert and published by Taylor & Francis. This book was released on 1976 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Application of the Transient Heat Transfer Measurement Technique Using Thermochromic Liquid Crystals in Networks of Intersecting Circular Passages written by Anika Steurer and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A System for Making Temperature Measurements Using Thermochromic Liquid Crystals written by Dino John Farina and published by . This book was released on 1994 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transient Liquid crystal Technique Used to Produce High resolution Convective Heat transfer coefficient Maps written by and published by . This book was released on 1993 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Use of Image Processing Techniques for Heat Transfer Measurements Using Thermochromic Liquid Crystals written by and published by . This book was released on 1994 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Macintosh-based image processing code has been developed for use in making continuous temperature profile measurements using thermochromic liquid crystals. This software is the result of extensive modifications to the public domain software, NIH Image developed by the National Institutes of Health. These modifications primarily include routines to quantify the TLC color changes as temperature measurements while providing a simple user interface. Using these techniques, one can perform literally thousands of temperature measurements over a small area (307,200 temperature measurements in a 640*480 image), thus making continuous profile measurement possible. This technique was developed in support of the Advanced Neutron Source Reactor (a new nuclear fission research reactor being developed at Oak Ridge National Lab.) for use in experiments designed to study the impact of a flow blockage at the inlet to the reactor core.
Download or read book An Investigation of the Use of Thermochromic Liquid Crystals for Heat Transfer Measurements in a Square Duct written by F. Shemirani and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Determination of Heat Transfer Coefficients for Electrical Blankets in Contact with Human Skin Using Thermochromic Liquid Crystals written by Peter Tonn and published by . This book was released on 2006 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Use of Thermochromic Liquid Crystals for Heat Transfer Measurement in Short Duration Hypersonic Wind Tunnel Facilities written by G. T. Roberts 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 Determination of Heat Transfer Coefficients Over Ribbed Surfaces with Infrared Thermography written by Francisco Brojo and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented at the ASME ASIA '97 Congress & Exhibition, Singapore, Sep 30 - Oct 2, 1997.
Download or read book Springer Handbook of Experimental Fluid Mechanics written by Cameron Tropea and published by Springer Science & Business Media. This book was released on 2007-10-09 with total page 1570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accompanying DVD-ROM contains ... "all chapters of the Springer Handbook."--Page 3 of cover.
Download or read book Introduction to Heat Transfer written by Bengt Sundén and published by WIT Press. This book was released on 2012 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting the basic mechanisms for transfer of heat, this book gives a deeper and more comprehensive view than existing titles on the subject. Derivation and presentation of analytical and empirical methods are provided for calculation of heat transfer rates and temperature fields as well as pressure drop. The book covers thermal conduction, forced and natural laminar and turbulent convective heat transfer, thermal radiation including participating media, condensation, evaporation and heat exchangers. This book is aimed to be used in both undergraduate and graduate courses in heat transfer and thermal engineering. It can successfully be used in R & D work and thermal engineering design in industry and by consultancy firms
Download or read book Principles of Enhanced Heat Transfer written by Ralph L. Webb and published by Wiley-Interscience. This book was released on 1994-03-28 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indeed, today "second generation" enhancement concepts are routing in the automotive and refrigeration industries to obtain lower cost, smaller heat exchanger size, and higher energy efficiency in system operation. And the aerospace, process, and power generation industries are not far behind.
Download or read book Cooling of Electronic Systems written by Sadik Kakaç and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 953 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electronic technology is developing rapidly and, with it, the problems associated with the cooling of microelectronic equipment are becoming increasingly complex. So much so that it is necessary for experts in the fluid and thermal sciences to become involved with the cooling problem. Such thoughts as these led to an approach to leading specialists with a request to contribute to the present book. Cooling of Electronic Systems presents the technical progress achieved in the fundamentals of the thermal management of electronic systems and thermal strategies for the design of microelectronic equipment. The book starts with an introduction to the cooling of electronic systems, involving such topics as trends in computer system cooling, the cooling of high performance computers, thermal design of microelectronic components, natural and forced convection cooling, cooling by impinging air and liquid jets, thermal control systems for high speed computers, together with a detailed review of advances in manufacturing and assembly technology. Following this, practical methods for the determination of the parameters required for the thermal analysis of electronic systems and the accurate prediction of temperature in consumer electronics. Cooling of Electronic Systems is currently the most up-to-date book on the thermal management of electronic and microelectronic equipment, and the subject is presented by eminent scientists and experts in the field. Vital reading for all designers of modern, high-speed computers.
